Kodak I1400 Image Processing Manual page 74

Contrast ⎯ adjusts the difference between black and white, thereby
making an image sharper or softer.
The difference between black and white is small with a low contrast
setting, so the image is softer. With a high contrast setting, the
difference between black and white is large, so the image is clearer.
Select a contrast value from -50 to 50. The default is 50.
A-61623 July 2008
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