Block For Compression, Expansion, And Editing Processing - Canon imagePRESS C1 P Service Manual

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.)
A BK signal is generated here
in Color mode.
UCR processing is performed
for the text area.
An LUT for correction is
created by PASCAL control.
To DC Controller
Circuit Board

4.5.5 Block for Compression, Expansion, and Editing Processing

imagePRESS C1 P / imagePRESS C1
Compression, expansion, and editing processing are performed on the Main Controller Circuit Board.
Reader Unit
Main Controller Circuit
Board (MAIN +
SUB (R-A)/(SUB PF-A))
- Under color removal
- Generate BK signal
RGB -> CMY conversion
- F-value adjustment
- Color balance correction
Output gamma correction
Optimum screen selection
- Trimming
- Masking
- Serial/parallel conversion
Y, M, C, Bk
of image data
- Video count
F-4-13
RGB 24
RGB 24
Output direct mapping
CMYK
Smoothing
CMYK 16
Chapter 4
Image
Area
Signal
Image
Area
Signal
0014-1305
4-15