Auto Gradation Correction Control - Canon iR C1020 Series Service Manual

8.2.5 Auto Gradation Correction Control

Overview
Auto gradation correction control is to stabilize the gradation density features of image.
To execute, select [Adjustment/Cleaning > Auto Gradation Correction] in additional function mode.
It has the following 3 correction controls.
Item
Full Correction (PASCAL) This correction outputs a test pattern and the reader scans its gradation
Quick Correction
Copy Image Correction
Operation flow
Following flow shows the operation of correction control when any of full correction, quick correction or copy image correction is selected from the auto gradation
correction.
Description
density to adjust the gradation.
This correction adjusts the gradation by means of D-half control instead
of outputting a test pattern.
This correction outputs a test pattern and the reader scans its gradation to
mainly adjust the gradation of copy image.
Copy Image Correction
T-8-2
Auto Gradation Correction
Full Correction Quick Correction
Test Printing 1
Scanning 1
Test Printing 2
Full Correction
Copy Image Correction
Quick Correction
Scanning 2
F-8-18
Number of test
Type of test pattern
pattern sheet
1st sheet: T-MIC
2
2nd sheet: high/low screen rulings
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T-MIC
1
Chapter 8
0020-9652
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8-13