Operating Modes 4-3
4.2 Graytone Mode
In Graytone mode, the actual gray level of each pixel is scanned; 256
levels are recognized, corresponding to 1 Byte (8 bits) per pixel. This
results in graytone files that are 8 times larger than uncompressed
files scanned in Line mode at the same resolution. For example, an E-
Size drawing scanned in Graytone mode at 300 dpi has a file size of
150 MByte, compared with typical 0.4 -1.0 MByte for a compressed file
in Line mode).
4.3 Photo Mode
In Photo mode, the gray levels of the scanned pixels are converted
into halftones by dithering. This results in very high density Line mode
files that are many times larger than uncompressed files scanned in
Line mode at the same resolution.
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