Ricoh PRIPORT VT 2000 Series Service Manual page 62

processing circuit. Some of the 4-bit image data from the A/D converter is
discarded according to the thinning timing control signal.
2.6.2 Movement:
Main scan direction: Examples (A4 version)
During the 71% reduction mode, 5 out of 7 pixels are used; 1 pixel is
discarded each cycle.
Before thinning
After thinning
During the 82% reduction mode, 9 out of 11 pixels are used; 2 pixels are
discarded each cycle.
Before thinning
After thinning
During the 93% reduction mode, 13 out of 14 pixels are used; 1 pixel is
discarded each cycle.
0
Before
thinning
0
After
thinning
0 1
0 1
(2nd and 5th pixels are removed.)
0 1 2
0 1 2
(3rd and 8th pixels are removed.)
1 2 3 4
1 2 3 4
7 pixels
2 3 4
5 pixels
2 3 4
11 pixels
3 4 5 6
9 pixels
3 4 5 6
14 pixels
5 6 7
13 pixels
5 6 7
2-35
28 February '91
5 6 0
5 0 1
7 8 9
7 8 0
8 9 10 11
6th pixels is removed.
8 9 10 11
1
2
10 0 1
1 2 3
12 13
12 0