Canon DR-9080C Service Manual page 63

7. Image Processing in the
Computer
Various types of image processing can be
executed in the personal computer, in addition to
the processing executed in this machine.
• Advanced text enhancement
• Skew correction (deskew)
• Reverse image (invert image)
• Text orientation recognition
• Erase dots
• Erase notches
• Border removal
• Size detection, etc.
The main types of image processing are
described below. For others, refer to the driver
software "Help".
COPYRIGHT © 2003 CANON ELECTRONICS INC.
1)
for each block within the scanned data is
calculated, and an optimum slice level is
determined to binarize the pixels.
background, for example, from behind text
printed on a background.
2-517, a histogram for each block is calculated,
and the optimum slice level is determined to
binarize the pixels.
CANON DR-6080/9080C REV.0 SEPT. 2003
CHAPTER 2 FUNCTIONS & OPERATION
Advanced text enhancement
In this mode, a histogram of brightness level
Binarizing in this
For example, as shown in the image in Fig.
Black
Brightness level
Fig. 2-517
way removes the
Slice level
White
2 - 39