Are the HRSC images ‘doctored’ in any way?
No, the images are not ‘doctored’. We use standard techniques for radiometric and geometric calibration but this is not ‘doctoring’. Nobody wants to see the raw image data as they are received, but even these will become accessible to the public, normally after six months. If, by chance, we received images suffering from, for example, ‘salt and pepper’ effects, or oversaturated pixels, they are ‘recovered’ using filter techniques from standard systematic processing procedures. These techniques have been used since the early days of image processing.
