Detecting The Orientation Of Originals - Canon ImageRunner 600 Service Manual

I.

Detecting the Orientation of Originals

In this block, the orientation of text data is checked to identify the orientation of an original so that
reduced page composition may take place in the correct orientation regardless of the orientation of
each original in the ADF.
All image data is
read, and text
areas are
extracted.
Image data is subjected to binary
processing to speed up processing.
COPYRIGHT © 1999 CANON INC.
IP PCB
Image data
8
Text area
detection block
2
Text data storage
block
Figure 4-308 Conceptual Diagram of Detection
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
CHAPTER 4 IMAGE PROCESSING SYSTEM
Communicates the result of
detection to the IP PCB.
[1] 0˚
[2] 90˚
[3] 180˚
[4] 270˚
[5] Not known (output as is)
Text orientation
detection block
Dictionary storage
block
Flash ROM
Stores language
dictionaries.
0˚
180˚
The text data in
storage and the
fonts in the
dictionary are
matched to identify
the orientation of
the text.
4-19