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. Contrast values range from -50 to 50. The default is 0.

Threshold — controls the level at which a pixel is considered black or white (1 bit/pixel). A low threshold value produces a lighter image, and can be used to subdue backgrounds and subtle, unneeded information. A high threshold value produces a darker image, and can be used to help pick up light information. Threshold values range from 0 to 255. The default is 90.

Threshold: 50

Threshold: 127

Filters - Noise

Lone Pixel: reduces random noise on black and white images by converting a single black pixel surrounded by white to white or by converting a single white pixel surrounded by black to black.

Majority Rule: sets the central pixel value in a matrix according to the majority of white or black pixels in a matrix.

No Noise Filter Used

Lone Pixel

A-61560 June 2006

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Kodak i1200 manual Filters Noise