Canon CLC 1120 Service Manual page 113

IMAGE PROCESSING SYSTEM
This chapter explains the operations and functions of the copier's image processing
mechanisms, and provides an outline of the timing at which various associated parts are driven.
I. OUTLINE .....................................4-1
II. CCD/CCD DRIVE........................4-2
A. Controlling the CCD ...............4-2
B. CCD Driver Circuit .................4-2
III. ANALOG IMAGE
PROCESSING ............................4-3
IV. DIGITAL IMAGE
PROCESSING ............................4-4
A. Outline ....................................4-4
B. Shading Correction ................4-6
C. 3-Line CCD Position Matching
Circuit .....................................4-7
D. Sensor Color Correction
Circuit .....................................4-7
E. Original Position Detection
Circuit .....................................4-8
F. Black Detection Circuit and
Edge/Line Width
Detection Circuit .....................4-9
COPYRIGHT © 1999 CANON INC.
CHAPTER 4
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
G. Chromatic Space Correction
Circuit .................................. 4-10
H. Direct Mapping Circuit ........ 4-10
I. Logarithmic Correction and
BGR-to-YMC Conversion .... 4-11
J. Toner Color Correction
Circuit .................................. 4-12
K. Coloring/Contour
Processing .......................... 4-12
L. Density Processing ............. 4-13
M. Enlargement/Reduction,
Shift, and Edit Processing ... 4-13
N. Sharpness/Filter
Processing .......................... 4-14
O. Anti-Counterfeit
Mechanism .......................... 4-14
P. CMYBk/RGB Integration ..... 4-15
Q. Texture Processing ............. 4-15
R. Color Conversion ................ 4-15
V. DISASSEMBLY/ASSEMBLY .... 4-16
A. Electrical Parts .................... 4-17