Hi, what the scanner adjustments do depends very much on the scanner. The selection of colour/grayscale/lineart affects the sampling and scanning speed on practically all scanners. Adjustments of brightness, contrast, colour hues are used to fine-tune the signal amplifiers on many scanners, but there are some where the adjustments are done by software after the scan.
If your scanner produces 3x8 bit RGB data only, you can expect that it does its adjustments by hardware, for otherwise you would lose too much quality (e.g., a too dim picture using pixel values between 0 and 63 can be "lit up" by software to use the full range, 0 to 255, but then you would still have merely 64 shades of colour instead of 255). If your scanner produces 3x12 or 3x16 bit RGB data, it is possible that the signal amplifiers work with fixed settings, and corrections are done by software. Regards, Ulrich Deiters -- Prof. Dr. Ulrich K. Deiters ______________________________________ Institut f. Physikalische Chemie \ Luxemburger Str. 116, D-50939 Koeln Universitaet zu Koeln /\/\... \ Tel. +49 (0)221 470-4543, Fax -4900 _______________________L|L|__|_____\ http://www.uni-koeln.de/deiters/
