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Hello,
I am scanning TEM (transmission electron microscopy) negatives using PS CS and Epson Perfection Photo 4990. In these negatives, there is a small rectangular area on the bottom which has some information like micron bar, etc. This area is in complete contrast with the remaining part of the image. For a long time, I would scan negatives and everytime it would give me different results (image contrast). I just realized that it was doing so because it has some kind of auto contrast, which would change the image depending upon the area I select with the marquee during scanning. If I select only a part of the film (without the transparent area in the bottom), it would give me results as expected.
Is there a way to disable this auto contrast? I went into configurations and tried a few things but could not fix the problem. It is important for me to scan the whole film as it is, including the bar in the bottom.
Alpesh
I am scanning TEM (transmission electron microscopy) negatives using PS CS and Epson Perfection Photo 4990. In these negatives, there is a small rectangular area on the bottom which has some information like micron bar, etc. This area is in complete contrast with the remaining part of the image. For a long time, I would scan negatives and everytime it would give me different results (image contrast). I just realized that it was doing so because it has some kind of auto contrast, which would change the image depending upon the area I select with the marquee during scanning. If I select only a part of the film (without the transparent area in the bottom), it would give me results as expected.
Is there a way to disable this auto contrast? I went into configurations and tried a few things but could not fix the problem. It is important for me to scan the whole film as it is, including the bar in the bottom.
Alpesh
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