Why preprocessing of Sentinel2 clipped images is resulting in blank white images ?

[rvrmohan]

I downloaded Sentinel2 images (except 1,9 & 10 bands) and clipped them to the study area. Then, I preprocessed them. When they are loaded in QGIS, they appear as blank white images. When I see these preprocessed bands in the folder, they are normal and visible properly. What could be the reason for this ?

[semiautomaticgit]

Hello, it is an issue related to nodata. You can simply set the stretching of raster in the layer properties setting minimum and maximum values as 0 and 1 respectively

[rvrmohan]

Thanks a lot for your prompt reply. I want to try using the SCP with higher resolution images. I recently downloaded Resourcesat LISS III images for my study area from BHUVAN ( https://bhuvan-app3.nrsc.gov.in/data/download/index.php) but could not figureout how to preprocess and convert them. The Metadata file does not contain such information. Please suggest. Thanks, Ramamohan

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On Thu, 8 Dec 2022, 16:49 Luca Congedo, ***@***.***> wrote: Hello, it is an issue related to nodata. You can simply set the stretching of raster in the layer properties setting minimum and maximum values as 0 and 1 respectively — Reply to this email directly, view it on GitHub <#245 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AZBAAWQEW6IJWRLZXNXKZY3WMG73XANCNFSM6AAAAAASVLRCKU> . You are receiving this because you authored the thread.Message ID: <semiautomaticgit/SemiAutomaticClassificationPlugin/repo-discussions/245/comments/4342315 @github.com>

[semiautomaticgit]

You are welcome @rvrmohan .

Unfortunately there are not specific tools for LISS III images, however you can use the tool Band calc to preprocess images knowing the calibration parameters.
Please read this tutorial as reference https://fromgistors.blogspot.com/2021/08/image-conversion-to-reflectance.html