diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +them if you wish), that you receive source code or can get it if you +want it, that you can change the software or use pieces of it in new +free programs, and that you know you can do these things. + + To protect your rights, we need to prevent others from denying you +these rights or asking you to surrender the rights. Therefore, you have +certain responsibilities if you distribute copies of the software, or if +you modify it: responsibilities to respect the freedom of others. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must pass on to the recipients the same +freedoms that you received. You must make sure that they, too, receive +or can get the source code. And you must show them these terms so they +know their rights. + + Developers that use the GNU GPL protect your rights with two steps: +(1) assert copyright on the software, and (2) offer you this License +giving you legal permission to copy, distribute and/or modify it. + + For the developers' and authors' protection, the GPL clearly explains +that there is no warranty for this free software. For both users' and +authors' sake, the GPL requires that modified versions be marked as +changed, so that their problems will not be attributed erroneously to +authors of previous versions. + + Some devices are designed to deny users access to install or run +modified versions of the software inside them, although the manufacturer +can do so. This is fundamentally incompatible with the aim of +protecting users' freedom to change the software. The systematic +pattern of such abuse occurs in the area of products for individuals to +use, which is precisely where it is most unacceptable. Therefore, we +have designed this version of the GPL to prohibit the practice for those +products. If such problems arise substantially in other domains, we +stand ready to extend this provision to those domains in future versions +of the GPL, as needed to protect the freedom of users. + + Finally, every program is threatened constantly by software patents. +States should not allow patents to restrict development and use of +software on general-purpose computers, but in those that do, we wish to +avoid the special danger that patents applied to a free program could +make it effectively proprietary. To prevent this, the GPL assures that +patents cannot be used to render the program non-free. + + The precise terms and conditions for copying, distribution and +modification follow. + + TERMS AND CONDITIONS + + 0. Definitions. + + "This License" refers to version 3 of the GNU General Public License. + + "Copyright" also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + "The Program" refers to any copyrightable work licensed under this +License. Each licensee is addressed as "you". "Licensees" and +"recipients" may be individuals or organizations. + + To "modify" a work means to copy from or adapt all or part of the work +in a fashion requiring copyright permission, other than the making of an +exact copy. The resulting work is called a "modified version" of the +earlier work or a work "based on" the earlier work. + + A "covered work" means either the unmodified Program or a work based +on the Program. + + To "propagate" a work means to do anything with it that, without +permission, would make you directly or secondarily liable for +infringement under applicable copyright law, except executing it on a +computer or modifying a private copy. Propagation includes copying, +distribution (with or without modification), making available to the +public, and in some countries other activities as well. + + To "convey" a work means any kind of propagation that enables other +parties to make or receive copies. Mere interaction with a user through +a computer network, with no transfer of a copy, is not conveying. + + An interactive user interface displays "Appropriate Legal Notices" +to the extent that it includes a convenient and prominently visible +feature that (1) displays an appropriate copyright notice, and (2) +tells the user that there is no warranty for the work (except to the +extent that warranties are provided), that licensees may convey the +work under this License, and how to view a copy of this License. If +the interface presents a list of user commands or options, such as a +menu, a prominent item in the list meets this criterion. + + 1. Source Code. + + The "source code" for a work means the preferred form of the work +for making modifications to it. "Object code" means any non-source +form of a work. + + A "Standard Interface" means an interface that either is an official +standard defined by a recognized standards body, or, in the case of +interfaces specified for a particular programming language, one that +is widely used among developers working in that language. + + The "System Libraries" of an executable work include anything, other +than the work as a whole, that (a) is included in the normal form of +packaging a Major Component, but which is not part of that Major +Component, and (b) serves only to enable use of the work with that +Major Component, or to implement a Standard Interface for which an +implementation is available to the public in source code form. A +"Major Component", in this context, means a major essential component +(kernel, window system, and so on) of the specific operating system +(if any) on which the executable work runs, or a compiler used to +produce the work, or an object code interpreter used to run it. + + The "Corresponding Source" for a work in object code form means all +the source code needed to generate, install, and (for an executable +work) run the object code and to modify the work, including scripts to +control those activities. However, it does not include the work's +System Libraries, or general-purpose tools or generally available free +programs which are used unmodified in performing those activities but +which are not part of the work. For example, Corresponding Source +includes interface definition files associated with source files for +the work, and the source code for shared libraries and dynamically +linked subprograms that the work is specifically designed to require, +such as by intimate data communication or control flow between those +subprograms and other parts of the work. + + The Corresponding Source need not include anything that users +can regenerate automatically from other parts of the Corresponding +Source. + + The Corresponding Source for a work in source code form is that +same work. + + 2. Basic Permissions. + + All rights granted under this License are granted for the term of +copyright on the Program, and are irrevocable provided the stated +conditions are met. This License explicitly affirms your unlimited +permission to run the unmodified Program. The output from running a +covered work is covered by this License only if the output, given its +content, constitutes a covered work. This License acknowledges your +rights of fair use or other equivalent, as provided by copyright law. + + You may make, run and propagate covered works that you do not +convey, without conditions so long as your license otherwise remains +in force. You may convey covered works to others for the sole purpose +of having them make modifications exclusively for you, or provide you +with facilities for running those works, provided that you comply with +the terms of this License in conveying all material for which you do +not control copyright. Those thus making or running the covered works +for you must do so exclusively on your behalf, under your direction +and control, on terms that prohibit them from making any copies of +your copyrighted material outside their relationship with you. + + Conveying under any other circumstances is permitted solely under +the conditions stated below. Sublicensing is not allowed; section 10 +makes it unnecessary. + + 3. Protecting Users' Legal Rights From Anti-Circumvention Law. + + No covered work shall be deemed part of an effective technological +measure under any applicable law fulfilling obligations under article +11 of the WIPO copyright treaty adopted on 20 December 1996, or +similar laws prohibiting or restricting circumvention of such +measures. + + When you convey a covered work, you waive any legal power to forbid +circumvention of technological measures to the extent such circumvention +is effected by exercising rights under this License with respect to +the covered work, and you disclaim any intention to limit operation or +modification of the work as a means of enforcing, against the work's +users, your or third parties' legal rights to forbid circumvention of +technological measures. + + 4. Conveying Verbatim Copies. + + You may convey verbatim copies of the Program's source code as you +receive it, in any medium, provided that you conspicuously and +appropriately publish on each copy an appropriate copyright notice; +keep intact all notices stating that this License and any +non-permissive terms added in accord with section 7 apply to the code; +keep intact all notices of the absence of any warranty; and give all +recipients a copy of this License along with the Program. + + You may charge any price or no price for each copy that you convey, +and you may offer support or warranty protection for a fee. + + 5. Conveying Modified Source Versions. + + You may convey a work based on the Program, or the modifications to +produce it from the Program, in the form of source code under the +terms of section 4, provided that you also meet all of these conditions: + + a) The work must carry prominent notices stating that you modified + it, and giving a relevant date. + + b) The work must carry prominent notices stating that it is + released under this License and any conditions added under section + 7. This requirement modifies the requirement in section 4 to + "keep intact all notices". + + c) You must license the entire work, as a whole, under this + License to anyone who comes into possession of a copy. This + License will therefore apply, along with any applicable section 7 + additional terms, to the whole of the work, and all its parts, + regardless of how they are packaged. This License gives no + permission to license the work in any other way, but it does not + invalidate such permission if you have separately received it. + + d) If the work has interactive user interfaces, each must display + Appropriate Legal Notices; however, if the Program has interactive + interfaces that do not display Appropriate Legal Notices, your + work need not make them do so. + + A compilation of a covered work with other separate and independent +works, which are not by their nature extensions of the covered work, +and which are not combined with it such as to form a larger program, +in or on a volume of a storage or distribution medium, is called an +"aggregate" if the compilation and its resulting copyright are not +used to limit the access or legal rights of the compilation's users +beyond what the individual works permit. Inclusion of a covered work +in an aggregate does not cause this License to apply to the other +parts of the aggregate. + + 6. Conveying Non-Source Forms. + + You may convey a covered work in object code form under the terms +of sections 4 and 5, provided that you also convey the +machine-readable Corresponding Source under the terms of this License, +in one of these ways: + + a) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by the + Corresponding Source fixed on a durable physical medium + customarily used for software interchange. + + b) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by a + written offer, valid for at least three years and valid for as + long as you offer spare parts or customer support for that product + model, to give anyone who possesses the object code either (1) a + copy of the Corresponding Source for all the software in the + product that is covered by this License, on a durable physical + medium customarily used for software interchange, for a price no + more than your reasonable cost of physically performing this + conveying of source, or (2) access to copy the + Corresponding Source from a network server at no charge. + + c) Convey individual copies of the object code with a copy of the + written offer to provide the Corresponding Source. This + alternative is allowed only occasionally and noncommercially, and + only if you received the object code with such an offer, in accord + with subsection 6b. + + d) Convey the object code by offering access from a designated + place (gratis or for a charge), and offer equivalent access to the + Corresponding Source in the same way through the same place at no + further charge. You need not require recipients to copy the + Corresponding Source along with the object code. If the place to + copy the object code is a network server, the Corresponding Source + may be on a different server (operated by you or a third party) + that supports equivalent copying facilities, provided you maintain + clear directions next to the object code saying where to find the + Corresponding Source. Regardless of what server hosts the + Corresponding Source, you remain obligated to ensure that it is + available for as long as needed to satisfy these requirements. + + e) Convey the object code using peer-to-peer transmission, provided + you inform other peers where the object code and Corresponding + Source of the work are being offered to the general public at no + charge under subsection 6d. + + A separable portion of the object code, whose source code is excluded +from the Corresponding Source as a System Library, need not be +included in conveying the object code work. + + A "User Product" is either (1) a "consumer product", which means any +tangible personal property which is normally used for personal, family, +or household purposes, or (2) anything designed or sold for incorporation +into a dwelling. In determining whether a product is a consumer product, +doubtful cases shall be resolved in favor of coverage. For a particular +product received by a particular user, "normally used" refers to a +typical or common use of that class of product, regardless of the status +of the particular user or of the way in which the particular user +actually uses, or expects or is expected to use, the product. A product +is a consumer product regardless of whether the product has substantial +commercial, industrial or non-consumer uses, unless such uses represent +the only significant mode of use of the product. + + "Installation Information" for a User Product means any methods, +procedures, authorization keys, or other information required to install +and execute modified versions of a covered work in that User Product from +a modified version of its Corresponding Source. The information must +suffice to ensure that the continued functioning of the modified object +code is in no case prevented or interfered with solely because +modification has been made. + + If you convey an object code work under this section in, or with, or +specifically for use in, a User Product, and the conveying occurs as +part of a transaction in which the right of possession and use of the +User Product is transferred to the recipient in perpetuity or for a +fixed term (regardless of how the transaction is characterized), the +Corresponding Source conveyed under this section must be accompanied +by the Installation Information. But this requirement does not apply +if neither you nor any third party retains the ability to install +modified object code on the User Product (for example, the work has +been installed in ROM). + + The requirement to provide Installation Information does not include a +requirement to continue to provide support service, warranty, or updates +for a work that has been modified or installed by the recipient, or for +the User Product in which it has been modified or installed. Access to a +network may be denied when the modification itself materially and +adversely affects the operation of the network or violates the rules and +protocols for communication across the network. + + Corresponding Source conveyed, and Installation Information provided, +in accord with this section must be in a format that is publicly +documented (and with an implementation available to the public in +source code form), and must require no special password or key for +unpacking, reading or copying. + + 7. Additional Terms. + + "Additional permissions" are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. +Additional permissions that are applicable to the entire Program shall +be treated as though they were included in this License, to the extent +that they are valid under applicable law. If additional permissions +apply only to part of the Program, that part may be used separately +under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + + When you convey a copy of a covered work, you may at your option +remove any additional permissions from that copy, or from any part of +it. (Additional permissions may be written to require their own +removal in certain cases when you modify the work.) You may place +additional permissions on material, added by you to a covered work, +for which you have or can give appropriate copyright permission. + + Notwithstanding any other provision of this License, for material you +add to a covered work, you may (if authorized by the copyright holders of +that material) supplement the terms of this License with terms: + + a) Disclaiming warranty or limiting liability differently from the + terms of sections 15 and 16 of this License; or + + b) Requiring preservation of specified reasonable legal notices or + author attributions in that material or in the Appropriate Legal + Notices displayed by works containing it; or + + c) Prohibiting misrepresentation of the origin of that material, or + requiring that modified versions of such material be marked in + reasonable ways as different from the original version; or + + d) Limiting the use for publicity purposes of names of licensors or + authors of the material; or + + e) Declining to grant rights under trademark law for use of some + trade names, trademarks, or service marks; or + + f) Requiring indemnification of licensors and authors of that + material by anyone who conveys the material (or modified versions of + it) with contractual assumptions of liability to the recipient, for + any liability that these contractual assumptions directly impose on + those licensors and authors. + + All other non-permissive additional terms are considered "further +restrictions" within the meaning of section 10. If the Program as you +received it, or any part of it, contains a notice stating that it is +governed by this License along with a term that is a further +restriction, you may remove that term. If a license document contains +a further restriction but permits relicensing or conveying under this +License, you may add to a covered work material governed by the terms +of that license document, provided that the further restriction does +not survive such relicensing or conveying. + + If you add terms to a covered work in accord with this section, you +must place, in the relevant source files, a statement of the +additional terms that apply to those files, or a notice indicating +where to find the applicable terms. + + Additional terms, permissive or non-permissive, may be stated in the +form of a separately written license, or stated as exceptions; +the above requirements apply either way. + + 8. Termination. + + You may not propagate or modify a covered work except as expressly +provided under this License. Any attempt otherwise to propagate or +modify it is void, and will automatically terminate your rights under +this License (including any patent licenses granted under the third +paragraph of section 11). + + However, if you cease all violation of this License, then your +license from a particular copyright holder is reinstated (a) +provisionally, unless and until the copyright holder explicitly and +finally terminates your license, and (b) permanently, if the copyright +holder fails to notify you of the violation by some reasonable means +prior to 60 days after the cessation. + + Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + + Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, you do not qualify to receive new licenses for the same +material under section 10. + + 9. Acceptance Not Required for Having Copies. + + You are not required to accept this License in order to receive or +run a copy of the Program. Ancillary propagation of a covered work +occurring solely as a consequence of using peer-to-peer transmission +to receive a copy likewise does not require acceptance. However, +nothing other than this License grants you permission to propagate or +modify any covered work. These actions infringe copyright if you do +not accept this License. Therefore, by modifying or propagating a +covered work, you indicate your acceptance of this License to do so. + + 10. Automatic Licensing of Downstream Recipients. + + Each time you convey a covered work, the recipient automatically +receives a license from the original licensors, to run, modify and +propagate that work, subject to this License. You are not responsible +for enforcing compliance by third parties with this License. + + An "entity transaction" is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an +organization, or merging organizations. If propagation of a covered +work results from an entity transaction, each party to that +transaction who receives a copy of the work also receives whatever +licenses to the work the party's predecessor in interest had or could +give under the previous paragraph, plus a right to possession of the +Corresponding Source of the work from the predecessor in interest, if +the predecessor has it or can get it with reasonable efforts. + + You may not impose any further restrictions on the exercise of the +rights granted or affirmed under this License. For example, you may +not impose a license fee, royalty, or other charge for exercise of +rights granted under this License, and you may not initiate litigation +(including a cross-claim or counterclaim in a lawsuit) alleging that +any patent claim is infringed by making, using, selling, offering for +sale, or importing the Program or any portion of it. + + 11. Patents. + + A "contributor" is a copyright holder who authorizes use under this +License of the Program or a work on which the Program is based. The +work thus licensed is called the contributor's "contributor version". + + A contributor's "essential patent claims" are all patent claims +owned or controlled by the contributor, whether already acquired or +hereafter acquired, that would be infringed by some manner, permitted +by this License, of making, using, or selling its contributor version, +but do not include claims that would be infringed only as a +consequence of further modification of the contributor version. For +purposes of this definition, "control" includes the right to grant +patent sublicenses in a manner consistent with the requirements of +this License. + + Each contributor grants you a non-exclusive, worldwide, royalty-free +patent license under the contributor's essential patent claims, to +make, use, sell, offer for sale, import and otherwise run, modify and +propagate the contents of its contributor version. + + In the following three paragraphs, a "patent license" is any express +agreement or commitment, however denominated, not to enforce a patent +(such as an express permission to practice a patent or covenant not to +sue for patent infringement). To "grant" such a patent license to a +party means to make such an agreement or commitment not to enforce a +patent against the party. + + If you convey a covered work, knowingly relying on a patent license, +and the Corresponding Source of the work is not available for anyone +to copy, free of charge and under the terms of this License, through a +publicly available network server or other readily accessible means, +then you must either (1) cause the Corresponding Source to be so +available, or (2) arrange to deprive yourself of the benefit of the +patent license for this particular work, or (3) arrange, in a manner +consistent with the requirements of this License, to extend the patent +license to downstream recipients. "Knowingly relying" means you have +actual knowledge that, but for the patent license, your conveying the +covered work in a country, or your recipient's use of the covered work +in a country, would infringe one or more identifiable patents in that +country that you have reason to believe are valid. + + If, pursuant to or in connection with a single transaction or +arrangement, you convey, or propagate by procuring conveyance of, a +covered work, and grant a patent license to some of the parties +receiving the covered work authorizing them to use, propagate, modify +or convey a specific copy of the covered work, then the patent license +you grant is automatically extended to all recipients of the covered +work and works based on it. + + A patent license is "discriminatory" if it does not include within +the scope of its coverage, prohibits the exercise of, or is +conditioned on the non-exercise of one or more of the rights that are +specifically granted under this License. You may not convey a covered +work if you are a party to an arrangement with a third party that is +in the business of distributing software, under which you make payment +to the third party based on the extent of your activity of conveying +the work, and under which the third party grants, to any of the +parties who would receive the covered work from you, a discriminatory +patent license (a) in connection with copies of the covered work +conveyed by you (or copies made from those copies), or (b) primarily +for and in connection with specific products or compilations that +contain the covered work, unless you entered into that arrangement, +or that patent license was granted, prior to 28 March 2007. + + Nothing in this License shall be construed as excluding or limiting +any implied license or other defenses to infringement that may +otherwise be available to you under applicable patent law. + + 12. No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Use with the GNU Affero General Public License. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU Affero General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the special requirements of the GNU Affero General Public License, +section 13, concerning interaction through a network will apply to the +combination as such. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + + Each version is given a distinguishing version number. If the +Program specifies that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..d00c5ac --- /dev/null +++ b/Makefile @@ -0,0 +1,38 @@ +# Use gimptool-2.0 to sett these variables +GIMPTOOL=gimptool-2.0 +PLUGIN_BUILD=$(GIMPTOOL) --build +PLUGIN_INSTALL=$(GIMPTOOL) --install-bin +GCC=g++ +LIBS=$(shell pkg-config fftw3 gimp-2.0 --libs) +CFLAGS=-O2 $(shell pkg-config fftw3 gimp-2.0 --cflags) +VERSION=0.4.1 +DIR=fourier-$(VERSION) + +export + +FILES= \ + fourier.c \ + Makefile \ + Makefile.win \ + README \ + README.Moire \ + fourier.dev + +all: fourier + +# Use of pkg-config is the recommended way +fourier: fourier.c + $(GCC) $(CFLAGS) $(LIBS) -o fourier fourier.c + +# To avoid gimptool use, just copy the fourier in the directory you want +install: fourier + $(PLUGIN_INSTALL) fourier + +dist: + mkdir $(DIR) + cp $(FILES) $(DIR) + tar czf "$(DIR).tar.gz" $(DIR) + rm -Rf $(DIR) + +clean: + rm -f fourier diff --git a/Makefile.win b/Makefile.win new file mode 100644 index 0000000..1e0e508 --- /dev/null +++ b/Makefile.win @@ -0,0 +1,29 @@ +# Project: Fourier +# Makefile created by Dev-C++ 4.9.9.0 + +CPP = g++.exe +CC = gcc.exe +WINDRES = windres.exe +RES = +OBJ = fourier.o $(RES) +LINKOBJ = fourier.o $(RES) +LIBS = -L"C:/Program Files/Dev-cpp/lib" -mwindows -lgimpui-2.0 -lgimpwidgets-2.0 -lgimp-2.0 -lgimpcolor-2.0 -lgimpmath-2.0 -lgimpbase-2.0 -lgtk-win32-2.0 -lgdk-win32-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpango-1.0 -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lfftw3 -fmessage-length=0 +INCS = -I"C:/Program Files/Dev-cpp/include" -I"C:/Program Files/Dev-Cpp/include/gtk-2.0" -I"C:/Program Files/Dev-Cpp/include/glib-2.0" -I"C:/Program Files/Dev-Cpp/lib/glib-2.0/include" -I"C:/Program Files/Dev-Cpp/lib/gtk-2.0/include" +CXXINCS = -I"C:/Program Files/Dev-cpp/include/c++/3.3.1" -I"C:/Program Files/Dev-cpp/include/c++/3.3.1/mingw32" -I"C:/Program Files/Dev-cpp/include/c++/3.3.1/backward" -I"C:/Program Files/Dev-cpp/lib/gcc-lib/mingw32/3.3.1/include" -I"C:/Program Files/Dev-cpp/include" -I"C:/Program Files/Dev-Cpp/include/gtk-2.0" -I"C:/Program Files/Dev-Cpp/include/glib-2.0" -I"C:/Program Files/Dev-Cpp/lib/glib-2.0/include" -I"C:/Program Files/Dev-Cpp/lib/gtk-2.0/include" +BIN = Fourier.exe +CXXFLAGS = $(CXXINCS) -I"C:\Program Files\Dev-Cpp\include\fftw" -fmessage-length=0 +CFLAGS = $(INCS) -fmessage-length=0 + +.PHONY: all all-before all-after clean clean-custom + +all: all-before Fourier.exe all-after + + +clean: clean-custom + rm -f $(OBJ) $(BIN) + +$(BIN): $(OBJ) + $(CPP) $(LINKOBJ) -o "Fourier.exe" $(LIBS) + +fourier.o: fourier.c + $(CPP) -c fourier.c -o fourier.o $(CXXFLAGS) diff --git a/README b/README new file mode 100644 index 0000000..abd760a --- /dev/null +++ b/README @@ -0,0 +1,64 @@ +Plugin GIMP : Fourier Transform + +I. What it does + + It does a direct and reverse Fourier Transform. + It allows you to work in the frequency domain. + For instance, it can be used to remove moiré patterns from +images scanned from books. (See README.Moire) + +II. Use + + It adds menu items : + Filters/Generic/Foward FFT + Filters/Generic/Inverse FFT + +III. Installation + + Linux: + make + make install + + You will need the fftw3 package, and the development packages + of gimp, fftw3, and glib. + + Win32: + + Binaries for win32 are provided (in a separate package), just copy the files + in the plugins directory of : + your personal gimp directory (ex: .gimp-2.2\plug-ins), + or in the global directory (C:\Program Files\GIMP-2.2\lib\gimp\2.0\plug-ins) + + If you don't have fftw3 installed on your system, you must download + the provided fftw3.dll, and copy it where you stored the plugin. + + You can compile it with the free environment DevCPP (mingw compiler). + You will need several DevPak : fftw3, GTK and gimp-dev (available on + devpaks.org). gimp-dev is designed to work with binaries version of + +History : + v0.1.1 : First release of this plugin + v0.1.2 : BugFixes by Mogens Kjaer , May 5, 2002 + v0.1.3 : Converted to Gimp 2.0 (dirty conversion) + v0.2.0 : Many improvements from Mogens Kjaer , Mar 16, 2005 + * Moved to gimp-2.2 + * Handles RGB and grayscale images + * Scale factors stored as parasite information + * Columns are swapped + v0.3.0 : Great Improvement from Alex Fernández with dynamic boosting : + * Dynamic boosted normalization : + fft/inverse loss of quality is now un-noticeable + * Removed the need of parasite information + v0.3.1 : Zero initialize padding (patch provided by Rene Rebe) + v0.3.2 : GPL, Fixed Makefile with pkg-config + v0.4.0 : Patch by Edgar Bonet : + * Reordered the data in a more natural way + * No Fourier coefficient is lost + +Many thanks to Mogens Kjaer, Alex Fernández, Rene Rebe and Edgar Bonet +for their contributions. + +-- +Rémi Peyronnet +remi.peyronnet@via.ecp.fr +http://www.via.ecp.fr/~remi diff --git a/README.Moire b/README.Moire new file mode 100644 index 0000000..8dae7b2 --- /dev/null +++ b/README.Moire @@ -0,0 +1,46 @@ +This plug-in to Gimp does a FFT of an image. + +I've used this with success to remove moiré patterns from +images scanned from books: + +The image should be in RGB. Remove the alpha layer, +this makes it easier (Layers|Flatten image). + +Select Filters|Render|FFT directe + +In the Layers window, select the layer, and "Duplicate Layer". + +Select Image|Colors|Brightness-Contrast. Increase Contrast so +you can see the patterns. + +The area in the upper left and upper right is the FFT of the +real image; don't modify this. The FFT of the moiré pattern +is outside these regions. Use the Rectangular Selection or +Elliptical Selection tools to select these regions. + +Remove the copy layer: This will leave the original FFT +image with the selections. + +Choose (128,128,128) as the background color. + +Select Edit|Fill with BG color. + +Remove the selections from the image. + +Select Filters|Render|FFT inverse + +Voilà, now you have an image without the moiré pattern! + +It was originally written by Rémi Peyronnet , +I have corrected a few bugs in it. + +Files: + +gpplugin.tar.gz: Contains these files: +gpplugin.c: The source code +Makefile: The Makefile +README: This file + +Mogens Kjaer +mk@crc.dk +May 5, 2002 diff --git a/fourier.c b/fourier.c new file mode 100644 index 0000000..137e73e --- /dev/null +++ b/fourier.c @@ -0,0 +1,394 @@ +/** + * (c) 2002-2009 - Remi Peyronnet + * + * Plugin GIMP : Fourier Transform + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see + * + * Jan 2010: Select Gray after transform + doc (patch by Martin Ramshaw) + * Oct 2009: Reordered the data in a more natural way: + * no Fourier coefficient is lost (patch by Edgar Bonet) + * Feb 2009: Fixed Makefile by using pkg-config instead of gimptool + * Jan 2009: Officialized distribution under GPL + * Dec 2007: Zero initialize padding (patch by Rene Rebe) + * Mar 2005: Windows compatibility, inverse remove parasite, cosmetics + * Aug 2005: Normalization by alejandrofer at google mail.com + * Remove parasite, normalize by a power function + * Mar 2005: Moved to gimp-2.2 by mk@crc.dk: + * Handles RGB and grayscale images + * Scale factors stored as parasite information + * Columns are swapped + * Oct 2004: Moved to gimp-2.0 (Linux only) + * May 2002: Minor modifications by mk@crc.dk + * + * You'll need to install fftw version 3 + * + * To install, run: + * + * CFLAGS="-O2" LIBS="-L/usr/local/lib -lfftw3" gimptool --install gpplugin.c + * + */ + +#include +#include +#include +#include +#include +#include + +// Uses the brillant fftw lib +#include + +/** Defines ******************************************************************/ + +#define PLUG_IN_NAME "plug_in_fft" +#define PLUG_IN_VERSION "Jan. 2010, 0.4.1" + +/** Plugin interface *********************************************************/ + +static void query(void); +static void run (const gchar *name, + gint nparams, + const GimpParam *param, + gint *nreturn_vals, + GimpParam **return_vals); + +GimpPlugInInfo PLUG_IN_INFO = { + NULL, /* init_proc */ + NULL, /* quit_proc */ + query, /* query_proc */ + run /* run_proc */ +}; + +/** Conversion functions *****************************************************/ + +inline gint round_gint (double value) +{ + double floored = floor (value); + if (value - floored > 0.5) + { + return (gint)(floored + 1); + } + return (gint)floored; +} + +inline gint boost (double value) +{ + double bounded = fabs (value / 160.0); + gint boosted = round_gint (128.0 * sqrt (bounded)); + boosted = (value > 0) ? boosted : -boosted; + return boosted; +} + +inline double unboost (double value) +{ + double bounded = fabs (value / 128.0); + double unboosted = 160.0 * bounded * bounded; + unboosted = (value > 0) ? unboosted : -unboosted; + return unboosted; +} + +inline guchar get_guchar (gint x, gint y, double d) +{ + gint i = round_gint (d); + //if (i > 255 || i < 0) { printf(" (%d, %d: %d) ", x, y, i); } + return (guchar) (i>=255)?255:((i<0)?0:i); +} + +inline guchar get_gchar128 (gint x, gint y, gint i) +{ + //if (i > 127 || i < -128) { printf(" (%d, %d: %d) ", x, y, i); } + return (guchar) (i>=(gint)128)?255:((i<=(gint)-128)?0:i+128); +} + +inline double get_double128 (gint x, gint y, guchar c) +{ + return (double)(c) - 128.0; +} + +/* Should pixel store imaginary part? */ +static inline gint pixel_imag(gint row, gint col, gint h, gint w) +{ + if (row==0 && h%2==0 || row==h/2) return col>w/2; + else return row>h/2; +} + +/* + * Map images coordinates (row, col) into Fourier array indices (row2, col2). + */ +static inline void map(gint row, gint col, gint h, gint w, + gint *row2, gint *col2) +{ + *row2 = (row+(h+1)/2) % h; /* shift origin */ + *col2 = (col+(w+1)/2) % w; + if (*col2 > w/2) { /* wrap */ + *row2 = (h-*row2)%h; + *col2 = w-*col2; + } + *col2 *= 2; /* unit = real number */ + if (pixel_imag(row, col, h, w)) (*col2)++; /* take imaginary part */ +} + +inline double normalize (gint x, gint y, gint width, gint height) +{ + double cx = (double)abs(x - width/2); + double cy = (double)abs(y - height/2); + double energy = (sqrt(cx)+sqrt(cy)); + return energy*energy; +} + +/** Main GIMP functions ******************************************************/ + +MAIN() + +void query(void) +{ + /* Definition of parameters */ + static GimpParamDef args[] = { + { GIMP_PDB_INT32, (gchar *)"run_mode", (gchar *)"Interactive, non-interactive" }, + { GIMP_PDB_IMAGE, (gchar *)"image", (gchar *)"Input image (unused)" }, + { GIMP_PDB_DRAWABLE, (gchar *)"drawable", (gchar *)"Input drawable" } + }; + + /* Forward FFT */ + gimp_install_procedure( + "plug_in_fft_dir", + "Apply an FFT to the image. This can remove (for example) moire patterns from images scanned from books:\n\n The image should be RGB (Image|Mode|RGB)\n\n Remove the alpha layer, if present (Image|Flatten Image)\n\n Select Filters|Generic|FFT Forward\n\n Use the preselected neutral grey to effectively remove any moir patterns from the image. Either paint over any patterns or\n\n - In the Layers window, select the layer, and 'Duplicate Layer'\n - Select Colours|Brightness-Contrast. Increase the Contrast to see any patterns.\n - Use the Rectangular and/or Elliptical Selection tools to select any patterns on the contrast layer.\n - Then remove the contrast layer leaving the original FFT layer with the selections.\n - Then select Edit|Fill with FG colour, remembering to cancel the Selection afterwards!\n\n Select Filters|Generic|FFT Inverse\n\nVoila, an image without the moire pattern!", + "This plug-in applies a FFT to the image, for educationnal or effects purpose.", + "Remi Peyronnet", + "Remi Peyronnet", + PLUG_IN_VERSION, + "FFT Forward", + "RGB*, GRAY*", + GIMP_PLUGIN, + G_N_ELEMENTS (args), 0, + args, NULL); + gimp_plugin_menu_register ("plug_in_fft_dir", "/Filters/Generic"); + + /* Inverse FFT */ + gimp_install_procedure( + "plug_in_fft_inv", + "Apply an inverse FFT to the image, effectively restoring the original image (plus changes).", + "This plug-in applies a FFT to the image, for educationnal or effects purpose.", + "Remi Peyronnet", + "Remi Peyronnet", + PLUG_IN_VERSION, + "FFT Inverse", + "RGB*, GRAY*", + GIMP_PLUGIN, + G_N_ELEMENTS (args), 0, + args, NULL); + gimp_plugin_menu_register ("plug_in_fft_inv", "/Filters/Generic"); +} + +static void +run (const gchar *name, + gint nparams, + const GimpParam *param, + gint *nreturn_vals, + GimpParam **return_vals) +{ + /* Return values */ + static GimpParam values[1]; + + gint sel_x1, sel_y1, sel_x2, sel_y2, w, h, padding; + gint img_height, img_width, img_bpp, cur_bpp, img_has_alpha; + + GimpDrawable *drawable; + GimpPixelRgn region; + GimpRunMode run_mode; + GimpPDBStatusType status; + + gint progress, max_progress; + + gint row, col, row2, col2, bounded; + + fftw_plan p; + double v, norm; + double *fft_real; + + int fft_inv=0; + + if (strcmp(name,"plug_in_fft_inv") == 0) { fft_inv = 1; } + + *nreturn_vals = 1; + *return_vals = values; + + status = GIMP_PDB_SUCCESS; + + if (param[0].type!= GIMP_PDB_INT32) status=GIMP_PDB_CALLING_ERROR; + if (param[2].type!=GIMP_PDB_DRAWABLE) status=GIMP_PDB_CALLING_ERROR; + + run_mode = (GimpRunMode) param[0].data.d_int32; + + drawable = gimp_drawable_get(param[2].data.d_drawable); + + img_width = gimp_drawable_width(drawable->drawable_id); + img_height = gimp_drawable_height(drawable->drawable_id); + img_bpp = gimp_drawable_bpp(drawable->drawable_id); + img_has_alpha = gimp_drawable_has_alpha(drawable->drawable_id); + gimp_drawable_mask_bounds(drawable->drawable_id, &sel_x1, &sel_y1, &sel_x2, &sel_y2); + // printf("img_width: %d\n", img_width); + // printf("img_height: %d\n", img_height); + // printf("img_bpp: %d\n", img_bpp); + // printf("img_has_alpha: %d\n", img_has_alpha); + + w = sel_x2 - sel_x1; + h = sel_y2 - sel_y1; + + if (status == GIMP_PDB_SUCCESS) + { + guchar * img_pixels; + + gimp_tile_cache_ntiles((drawable->width + gimp_tile_width() - 1) / gimp_tile_width()); + + gimp_progress_init(fft_inv?"Apply inverse Fourier transform...":"Apply Fourier transform..."); + + // Process + gimp_pixel_rgn_init (®ion, drawable, sel_x1, sel_y1, w, h, FALSE, FALSE); + img_pixels = g_new (guchar, w * h * img_bpp ); + gimp_pixel_rgn_get_rect(®ion, img_pixels, sel_x1, sel_y1, w, h); + + gimp_pixel_rgn_init (®ion, drawable, sel_x1, sel_y1, w, h, TRUE, TRUE); + + // FFT ! + padding = (w&1) ? 1 : 2; + + fft_real = g_new(double, (w+padding) * h); + + max_progress = /*w*h*/img_bpp*3; + + // printf("Making plans...\n"); + if (fft_inv == 0) + { + p = fftw_plan_dft_r2c_2d(h, w, fft_real, (fftw_complex *) fft_real, FFTW_ESTIMATE); + } + else + { + p = fftw_plan_dft_c2r_2d(h, w, (fftw_complex *) fft_real, fft_real, FFTW_ESTIMATE); + } + // printf("Done!\n"); + + progress = 0; + + for(cur_bpp=0;cur_bppdrawable_id, TRUE); + gimp_drawable_update (drawable->drawable_id, sel_x1, sel_y1, (sel_x2-sel_x1), (sel_y2-sel_y1)); + gimp_displays_flush(); + + // set FG to neutral grey; used to mask moire patterns, etc + if (fft_inv == 0) + { + GimpRGB neutral_grey; + gimp_rgba_set_uchar(&neutral_grey, 128, 128, 128, 1); + gimp_context_set_foreground(&neutral_grey); + } + + } + + values[0].type = GIMP_PDB_STATUS; + values[0].data.d_status = status; + gimp_drawable_detach(drawable); + +} diff --git a/fourier.dev b/fourier.dev new file mode 100644 index 0000000..4948aed --- /dev/null +++ b/fourier.dev @@ -0,0 +1,59 @@ +[Project] +FileName=Fourier.dev +Name=Fourier +UnitCount=1 +Type=0 +Ver=1 +ObjFiles= +Includes="C:\Program Files\Dev-Cpp\include\gtk-2.0";"C:\Program Files\Dev-Cpp\include\glib-2.0";"C:\Program Files\Dev-Cpp\lib\glib-2.0\include";"C:\Program Files\Dev-Cpp\lib\gtk-2.0\include" +Libs= +PrivateResource= +ResourceIncludes= +MakeIncludes= +Compiler= +CppCompiler=-I"C:\Program Files\Dev-Cpp\include\fftw"_@@_ +Linker=-lgimpui-2.0 _@@_-lgimpwidgets-2.0 _@@_-lgimp-2.0 _@@_-lgimpcolor-2.0 _@@_-lgimpmath-2.0 _@@_-lgimpbase-2.0 _@@_-lgtk-win32-2.0_@@_-lgdk-win32-2.0 _@@_-latk-1.0 _@@_-lgdk_pixbuf-2.0 _@@_-lpango-1.0 _@@_-lgobject-2.0 _@@_-lgmodule-2.0 _@@_-lglib-2.0_@@_-lfftw3_@@_ +IsCpp=1 +Icon= +ExeOutput= +ObjectOutput= +OverrideOutput=0 +OverrideOutputName=Fourier.exe +HostApplication= +Folders= +CommandLine= +UseCustomMakefile=0 +CustomMakefile= +IncludeVersionInfo=0 +SupportXPThemes=0 +CompilerSet=0 +CompilerSettings=0000000000000000001000 + +[Unit1] +FileName=fourier.c +CompileCpp=1 +Folder=Fourier +Compile=1 +Link=1 +Priority=1000 +OverrideBuildCmd=0 +BuildCmd= + +[VersionInfo] +Major=0 +Minor=1 +Release=1 +Build=1 +LanguageID=1033 +CharsetID=1252 +CompanyName= +FileVersion= +FileDescription=Developed using the Dev-C++ IDE +InternalName= +LegalCopyright= +LegalTrademarks= +OriginalFilename= +ProductName= +ProductVersion= +AutoIncBuildNr=0 + diff --git a/scripts/descreen.scm b/scripts/descreen.scm new file mode 100644 index 0000000..02bcafd --- /dev/null +++ b/scripts/descreen.scm @@ -0,0 +1,112 @@ +; Descreen v1.0 +; Tested on Gimp v2.6.8 +(define (script-fu-descreen image drawable sensitivity selectiongrowth despeckle middle-ratio) + ; This script requires the FFT plug-in which provides FFT forward and FFT inverse filter + (if (not (defined? 'plug-in-fft-dir)) + (begin + ; Display an error message + (gimp-message "This script requires the FFT plug-in") + + ; Abort the script + (quit) + ) + ) + + ; Start an undo group + (gimp-image-undo-group-start image) + + ; Save the context (FFT plug-in change the foreground color) + (gimp-context-push) + + ; Ensure the layer has no alpha channel (FFT plug-in does not work well with them) + (gimp-layer-flatten drawable) + + ; Apply the FFT forward filter + (plug-in-fft-dir RUN-NONINTERACTIVE image drawable) + + (let* ( + ; Duplicate the layer containing the image FFTed + (detection (car (gimp-layer-copy drawable FALSE))) + + ; Add the new layer to the image + (exec (gimp-image-add-layer image detection -1)) + + ; Calculate the low threshold given the sensitivity (low-threshold=256-sensitivity) + (low-threshold (- 256 sensitivity)) + + ; Determine the dimensions of the middle zone that should remain untouched + (middle-width (/ (car (gimp-image-width image)) middle-ratio)) + (middle-height (/ (car (gimp-image-height image)) middle-ratio)) + + ; Calculate the middle of the picture + (middle-x (/ (car (gimp-image-width image)) 2)) + (middle-y (/ (car (gimp-image-height image)) 2)) + + ; gimp-ellipse-select needs the upper left coordinates of the ellipse + (middle-x (- middle-x (/ middle-width 2))) + (middle-y (- middle-y (/ middle-height 2)))) + + ; Keep only strong frequencies + (gimp-threshold detection low-threshold 255) + + ; Select the points + (gimp-by-color-select detection '(255 255 255) 0 0 0 FALSE 0 FALSE) + + ; Grow the selection + (gimp-selection-grow image selectiongrowth) + + ; Remove the middle of the picture from the selection + (gimp-ellipse-select image middle-x middle-y middle-width middle-height 1 FALSE FALSE 0) + + ; Fill the picture according to the selection. + ; Foreground color has been set by the FFT plugin to #808080 + (gimp-edit-fill drawable 0) + + ; Delete the detection layer + (gimp-image-remove-layer image detection) + + ; Unselect + (gimp-selection-none image) + ) + + ; Do an FFT inverse on the picture + (plug-in-fft-inv RUN-NONINTERACTIVE image drawable) + + ; Check if despeckle has been selected + (if despeckle + ; Do a last despeckle to remove small points + (plug-in-despeckle RUN-NONINTERACTIVE image drawable 1 0 -1 256) + ) + + ; Restore the original context + (gimp-context-pop) + + ; End the undo group + (gimp-image-undo-group-end image) +) + +(script-fu-register "script-fu-descreen" + "/Filters/Enhance/Descreen" + "Descreen filter" + "Frédéric BISSON" + "Frédéric BISSON" + "01/05/2010" + "RGB*" + SF-IMAGE "Image" 0 + SF-DRAWABLE "Drawable" 0 + + ; Sensitivity to frequency level : + ; 1=nearly insensitive, 128=sensitive to any frequency level + SF-ADJUSTMENT "Sensitivity" '(72 1 128 1 16 0 SF-ROLLBOX) + + ; After the frequency level detection, the filter will affect + ; everything within the range of the growth + SF-VALUE "Selection growth" "16" + + ; Do a final despeckle before ending the filter + SF-TOGGLE "Despeckle" TRUE + + ; Consider the middle of the picture to be a ratio of the + ; image dimensions. + SF-VALUE "Ratio for middle preservation" "5" +)