Canon CanoScan FS2700F User Guide - Page 58
Color Correction - Threshold, Adjusts the brightness of dithered images
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Color Correction - Threshold STEP 4 Adjusts the brightness of dithered images In the dithering mode, the mid-tones of a photograph, are converted to either black or white based on the threshold setting. The threshold setting is the point at which a gray pixel is judged to become either black or white. The setting can be specified as a number in the range from 1 to 255. Pixels judged to be below the threshold setting are converted to black and those above the setting are converted to white. Therefore, the higher the threshold setting, the darker the image, and the lower the threshold setting, the lighter the image. Threshold = 128 (standard) Threshold = 180 Threshold = 70 58 58
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S T E P
4
Adjusts the brightness of dithered images
In the dithering mode, the mid-tones of a photograph, are converted to either black or
white based on the threshold setting.
The threshold setting is the point at which a gray
pixel is judged to become either black or white.
The setting can be specified as a
number in the range from 1 to 255.
Pixels judged to be below the threshold setting are converted to black and those above
the setting are converted to white.
Therefore, the higher the threshold setting, the
darker the image, and the lower the threshold setting, the lighter the image.
Color Correction - Threshold
Threshold = 180
Threshold = 70
Threshold = 128 (standard)