Image Processing; Image Processing Block Diagram - Konica Minolta magicolor 8650 Service Manual

Theory of Operation Ver. 2.0 Nov. 2007

22. Image processing

22.1 Image processing block diagram

PC print data
1. BTC compression
2. Input buffer memory
3. JBIG compression
4. File (code) memory
DRAM:1024MB (standard)
HDD:60GB (Option)
5. JBIG expansion
6. Memory access coordinator
7. Frame memory
8. Output buffer memory
• The following detail the image processing operations performed by MFP board.
1. Each image data is compressed (RGB image data for the PCI driver and YMCK
image data for the PS driver).
2. Temporarily stores the BTC-compressed image data.
3. The stored image data is compressed in the JBIG (Joint bi-level image experts
group) format.
4. Stores the compressed image data.
5. The image data read from the file memory is uncompressed through a method in a
reverse way of JBIG compression. At this time, image rotating or sorting processing
is conducted.
6. JBIG image data are expanded in the frame memory.
7. Stores the image data.
22. Image processing
MFP board
9. BTC expansion
10. Color conversion processing
11. Area discrimination FEET
12. Interpolation
13. Gamma correction
14. Screening
15. Delay control for the interval
of PC drums
16. Main scanning position correc-
tion
Main scanning speed conver-
sion
Modulation
To PH unit
115