Canon CANOSCAN FB330 series Service Manual page 61

CHAPTER 2
III. IMAGE PROCESSING SYSTEM
A. Outline
Figure 2-22 shows a block diagram of the main functions of the image processing system.
The image processing system converts the signals read by the contact image sensor into digital
data, performs various image processing, and outputs the data to the host computer via PC
port/USB port. Shading correction and gamma correction are performed by the driver software
instead of the scanner function.
1. Contact
3. Shading
4. Gamma
5. Resolution
2. A/D
image
conversion
correction
correction conversion
sensor
6. Packing
To host computer
Figure 2-22
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COPYRIGHT © 1999 CANON INC. CANOSCAN FB330/FB630 SERIES REV.0 OCT. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)