CHAPTER 2
2 - 17
COPYRIGHT
©
2000 CANON INC. CANOSCAN FB1210U REV.0 APR. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
255
254
.
.
.
129
128
127
126
.
.
.
1
0
1
1
.
.
.
1
1
0
0
.
.
.
0
0
Binary
processing
Slice
level
Document
Image data
(8 bits)
Binary data
(1 bit)
Output image
8 bit grayscale data
A
Comparator A>B
B
Slice level
register
From ASIC
Binary data
(1 bit)
G. Binary Processing
Binary processing converts the 8-bit grayscale data into binary data in which 1 bit indicates
white or black.
Figure 2-14
The ASIC sets parameters (slice level) in the slice level register when the host computer
commands binary processing. The comparator compares the image data with the slice level,
and converts the data into binary data consisting of 1 (black) or 0 (white).
Figure 2-15
