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Appendix A-38
e) Number of resident dither patterns and number of registrable dither patterns: Byte 56
Indicates the number of internal dither patterns and the number of dither patterns that can
be downloaded.
B'nnnnXXXX': Number of internal dither patters (upper 4 bits)
B'XXXXnnnn': Number of dither patterns that can be downloaded (lower 4 bits)
The scanner returns X'48'.
f) Number of resident gamma patterns and number of registrable gamma patterns: Byte 57
B'nnnnXXXX': Number of internal gamma patterns (upper 4 bits)
B'XXXXnnnn': Number of gamma patterns that can be downloaded (lower 4 bits)
The scanner returns X'38'.
g) Image processing function: Bytes 58 and 59
Indicates the supported image processing functions.
Byte Bit Description
58 1XXXXXXX b
X1XXXXXX b
XX1XXXXX b
XXX1XXXX b
XXXX1XXX b
XXXXX1XX b
XXXXXX1X b
XXXXXXX1 b
Black and white reversal
Automatic I (automatic monochrome: DTC)
Automatic II (simple automatic monochrome)
Edge detection
Edge highlighting
Image area separation
Mirror image
Unique white level
59 1XXXXXXX b
X1XXXXXX b
XX1XXXXX b
XXX1XXXX b
XXXX1XXX b
XXXXX1XX b
XXXXXX1X b
XXXXXXX1 b
Subwindow
Error distribution
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
The scanner returns X'0140' if the image processing option is not installed. The scanner
returns X'FFC0' if the image processing option is installed.