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B-4 Expression 636 Scanner Settings
The scanner can read up to 12 bits/pixel/color. Above
8 bits/pixel/color the scanner converts the image data to
8 bits/pixel/color and sends it to the computer. This gives much
higher quality.
To reproduce an image of more than 2 bits/pixel/color the
output device should be capable of producing the same tones.
Many displays and printers cannot do this and are limited to
monochrome without gradations, or to 8 or 16 or 256 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.
Data format Monochrome Color
1 bit/pixel/color 2 grays 8 colors
2 bits/pixel/color 4 grays 64 colors
3 bits/pixel/color 8 grays 512 colors
4 bits/pixel/color 16 grays 4,096 colors
5 bits/pixel/color 32 grays 32,768 colors
6 bits/pixel/color 64 grays 262,144 colors
7 bits/pixel/color 128 grays 2,097,152 colors
8 bits/pixel/color 256 grays 16,777,216 colors
8 bits 2 bits 1 bit