发明名称 PICTURE SIGNAL PROCESSOR
摘要 PURPOSE:To eliminate phenomena of Moire, etc., which become visual obstacles so as to obtain pictures having a high sharpness, by performing area division with an amplitude intensity signal of a specific frequency component in a specific frequency component in a specific picture element and changing the process at every area. CONSTITUTION:Data corresponding to a necessary picture element in a line memory 1 are sent to an amplitude intensity detecting circuit 2, smoothing circuit 4, and sharpness emphasizing circuit 5. At the amplitude intensity detecting circuit 2, the amplitude intensity signal (b) of a specific frequency component to be detected in outputted. At the smoothing circuit 4 and sharpness emphasizing circuit 5, a smoothing signal (c) from which a specific frequency component is reduced, and a sharpness emphasizing signal (d) to which a specific frequency component is emphasized, are outputted, respectively. The amplitude intensity signal (b) is compared with a threshold TH at a comparator 3 and an area dividing signal (e) is outputted. A switch 6 selects the smoothing signal (c) and sharpness emphasizing signal (d) in accordance with the inputted area dividing signal (e) and uses the signal (d) as an output signal (f).
申请公布号 JPS60120482(A) 申请公布日期 1985.06.27
申请号 JP19830227073 申请日期 1983.12.02
申请人 CANON KK 发明人 SATOU HIROAKI
分类号 G06K9/40;G06T1/00;G06T5/00;G06T5/20;G09G5/00;H04N1/40;H04N1/409 主分类号 G06K9/40
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