Epson ES-800C, Руководство пользователя

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To reproduce an image of more than 2 bits/pixel/color,
however, the output device should also be capable of
producing the same tones. Many displays and printers cannot
deal with this and are limited to monochrome without
gradations, or to 8 or 16 colors.
The data format chosen also affects the amount of data
necessary for scanning and storing an image. The larger the bits
per pixel value chosen, the larger the amount of image data
becomes.
One of seven brightness levels can be chosen for scanning.
Medium is the normal setting.
It is better to use darker settings for line art, or faint original
images, and to use lighter settings for darker original images.
The brightness can be combined with any other function.
The graph below shows the differences between the brightness
settings when the gamma correction is set for the CRT Display
A setting.
Lightest
setting
Lighter
I
(center)
Data output
Darkest setting
Darker
Darker
Image input
Lighter
Appendix A-7