[Gdal-dev] Subtracting images

[Morten Nielsen]

Is it possible to subtract two images from each other using GDAL?

 

I have a large virtual raster covering a wide area, and several smaller
base-images.

I want to create a difference image where the part of the virtual raster
that covers the base-image is subtracted from the base-image. Output
should be the absolute difference in each band. The images are all
georeferenced and have the same resolution. Are there any commandline
tools available for this?

 

Any help is appreciated.

 

Best regards

/Morten

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