Canon GP405 - Image Formation System

COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4
IMAGE FORMATION SYSTEM
I. OUTLINE.....................................4-1
II. ANALOG IMAGE PROCESSING.. 4-3
A. Outline....................................4-3
B. CCD .......................................4-3
C. AE Processing
(ABC processing)...................4-4
D. A/D Conversion ......................4-5
E. Analog Signal Processing
Block ......................................4-6
III. DIGITAL IMAGE PROCESSING ... 4-7
A. Outline....................................4-7
B. Shading Correction ................4-8
C. Total Processing.....................4-9
D. Density Processing ............. 4-12
E. Binary Processing ............... 4-16
F. Image Memory .................... 4-19
G. Overlay Copying.................. 4-21
IV. DISASSEMBLY/ASSEMBLY .... 4-22
A. CCD Unit ............................. 4-23
B. IP PCB ................................ 4-24
C. Replacing the ROM DIMM
(on the image processor PCB).. 4-25