Microtek ScanMaker 6100 Pro, User Manual

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Advanced Control Panel > Settings window
White/Black Points tool
For color and gray images, this tool allows you set white/black
points ; for line-art image, it carries out threshold adjustment
feature.
How to use the White/Black Points tool
(Color/Gray
image)
Click either one of thumbnails below to obtain a larger view.
Windows Macintosh
Histogram
The histogram is a graphic representation of how all the pixels in an
image are distributed across brightness and darkness levels. The
darkest pixels are at the left; the lightest pixels are at the right.
A histogram skewed heavily to the left indicates that the image has
many more dark pixels than light. Conversely, a histogram skewed
heavily to the right will indicate a light image as it has more light
pixels than dark. The height of the histogram indicates the number
of pixels at that point in the histogram.