Canon imagePRESS C1 Service Manual - page 263
Chapter 4
4-15
F-4-13
4.5.5 Block for Compression, Expansion, and Editing Processing
0014-1305
imagePRESS C1 P / imagePRESS C1
Compression, expansion, and editing processing are performed on the Main Controller Circuit Board.
- Serial/parallel conversion
of image data
- Video count
Main Controller Circuit
Board (MAIN +
SUB (R-A)/(SUB PF-A))
Reader Unit
RGB
24
Image
Area
Signal
Image
Area
Signal
CMYK
- F-value adjustment
- Color balance correction
- Trimming
- Masking
- Under color removal
- Generate BK signal
Output direct mapping
RGB -> CMY conversion
Output gamma correction
Optimum screen selection
Smoothing
RGB
24
CMYK
16
A BK signal is generated here
if a black-and-white original is
detected by ACS detection.
(Data is throughput if a color
original is detected.)
UCR processing is performed
for the text area.
An LUT for correction is
created by PASCAL control.
A BK signal is generated here
in Color mode.
Y, M, C, Bk
To DC Controller
Circuit Board