PURPOSE: To realize high speed processing by processing the image while decimating the image data at the inner circumferential part thereby bringing resolution at the inner circumferential part close to that at the outer circumferential part.
CONSTITUTION: A radial counter 7 counts the number of pixels and the first half of pixels detected through a line sensor 3 is written into an inner circumference memory 5 while the second half of pixels is written into an outer circumference memory 6. In the memory 6, count of a counter 7 is set at a column address and the count of a circumferential counter 8 is set at a row address but the address line from an image processing section 9 has high impedance and outputs no signal. At the time of memory read, row and column addresses are outputted from the processing section 9 and the outputs from the counters 7, 8 are not delivered because of high impedance. In the memory 5, continuous counts are fed from the counter 8 through a shifter/selector 14 to row addresses at the time of writing and row addresses from the processing section 9 are fed to row addresses while being shifted up by an arbitrary number of bits through a selector 14 at the time of reading and the image data is read out from the memory 5 while being decimated.
KAJIURA TORU
YASUTOMI FUMIO
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