Minolta CF910 Service Manual page 42

5 Zoom/Movement Processing: PWB-C
• The image is edited according to the editing features selected on the control panel
(enlargement/reduction, image moving, image repeat)
• Two memories (FIFOs) are used to edit the image as required.
Zoom
• The synchronous timing of the input data (read) and output data (read) is varied to
decrease (reduction) or increase (enlargement) the number of data readings,
thereby reducing or enlarging the image in the main scanning direction.
• The image is reduced or enlarged in the sub-scanning direction by varying the
speed at which the Scanner moves.
Movement
• The start position of the output data (read) with respect to the input data (read) is
varied to move the image in the main scanning direction.
• The image is moved in the sub-scanning direction by varying the scan start timing
of the Scanner.
Image Repeat
• The input data (read) stored in the memory is output (read) several times.
Input
FIFO
(Write)
M-25
Output
FIFO
(Read)