NoteShrink

This project makes scans and handwritten notes more beautiful! The program clears synopses and scans from "dirt", improves their readability and reduces the size of the image up to 10,000 times(!).

Tasks

• Create an algoritm and console app
• Create GUI
• Add scan and print feature
• Add notes drawing and editing features
  • Add a pen tool
  • Add a text tool
  • Add an eraser tool
• Add the ability to add more than one page (30%)
• Add the ability to save to PDF
• Add support for multi-thread processing
• Translate Python to C/C++ (25%)
• Maybe redraw GUI
• Create a web site with the same functionality

Example

Input [4.33 Mb]

Output [44.1 Kb]

See more examples at here

Building

Python

If you want to use the console version you may use only Python module. You can compile it to win32 EXE file with cx_Freeze (How convert a .py to .exe). You may find a python script here.

Requirements for python

• Python 3
• NumPy 1.10 or later
• SciPy
• ImageMagick
• Image module Pillow

Usage

./noteshrink.py IMAGE1 [IMAGE2 ...]

or

convert scanned, hand-written notes to PDF

positional arguments:
  IMAGE               files to convert

optional arguments:
  -h, --help          show this help message and exit
  -q                  reduce program output
  -b BASENAME         output PNG filename base (default page)
  -o PDF              output PDF filename (default output.pdf)
  -v PERCENT          background value threshold % (default 25)
  -s PERCENT          background saturation threshold % (default 20)
  -n NUM_COLORS       number of output colors (default 8)
  -p PERCENT          % of pixels to sample (default 5)
  -w                  make background white
  -g                  use one global palette for all pages
  -S                  do not saturate colors
  -K                  keep filenames ordered as specified; use if you *really*
                      want IMG_10.png to precede IMG_2.png
  -P POSTPROCESS_CMD  set postprocessing command (see -O, -C, -Q)
  -e POSTPROCESS_EXT  filename suffix/extension for postprocessing command
  -O                  same as -P "optipng -silent %i -out %o"
  -C                  same as -P "pngcrush -q %i %o"
  -Q                  same as -P "pngquant --ext %e %i"
  -c COMMAND          PDF command (default "convert %i %o")

CShrp

1. Compile Python to EXE
2. Build C# project
3. Copy a Python exe, dll file and lib folder to \bin\Debug\ or \bin\Release\ directory (I'm sorry for this, but I promise I will fix it soon).

Requirements for CSharp

• Microsoft Visual C++ 2017 Redistributable Package

license

This project based on https://github.com/mzucker/noteshrink