Ricoh B245-62 Service Training page 29

Image Processing – Overview
The illustration shows image processing data flow.
See the notes for a list of the processes done.
Note: The next 13 slides will cover some details of image processing.
Slide 29
The BICU is where the main image processing is done.
The image data from the SBU goes to the IPU (Image Processing Unit) on the BICU
board, which carries out the following processes on the image data:
Auto shading
White/black line correction
ADS
Scanner gamma correction
Magnification (main scan)
Filtering (MTF and smoothing)
ID gamma correction
Binary picture processing
Error diffusion
Dithering
Video path control
Test pattern generation
The image data then goes to the GDI controller.
Note: The IPU and VCU are contained in the same IC (called SCRATCH) on the BICU.
For more information about image processing, refer to the core technology manual.
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B245-62 / PD-C4