Determining The Color Mode - Canon CanoScan FS4000US User Manual

Determining the Color Mode

You may select from among five color modes.
24-Bit Color
42-Bit Color
8-Bit Grayscale
14-Bit Grayscale
Black and White
Select this setting to scan standard color films. The image is
expressed in 256 tones (8 bits) per RGB (red, green and blue)
channel.
Select this setting when a particularly high-quality color image is
required. The image is expressed in 16,384 tones (14 bits) per RGB
channel. The scanning time will be longer and the file will be larger
than the corresponding 24-bit color file. This requires an application
program such as Photoshop that supports 42-bit color.
Select this setting for monochrome films or when a monochrome
image is desired. The image is expressed in 256 tones (black, white
and 254 gray shades).
Select this setting when a particularly high-
quality grayscale image is required. The
image is expressed in 16,384 tones (black,
white and 16,382 gray shades). The file will
be larger than the corresponding 8-bit
grayscale file. This requires an application
program such as Photoshop that supports
14-bit color.
Images are expressed in two colors only:
black and white. Light and dark areas of the
image are expressed as either black or white
according to the threshold value. The
threshold value can be freely set.
Grayscale
Black and White
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