发明名称 |
Method of and circuit arrangement for changing the resolution of binary pseudo-halftone pictures |
摘要 |
A first pseudo-halftone picture is converted to a second pseudo-halftone picture of reduced resolution in the ration m:n by dividing the first picture into contiguous picture fields each having ixn lines and jxn columns of picture elements in contiguous square subfields each having n2 picture elements. m2 elements are selected from each subfield in accordance with a selection sequence which depends on the position of the subfield in the picture field, the elements being selected from all ixn lines and all jxn columns of each picture field, the selection sequence being the same for each picture field.
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申请公布号 |
US4827353(A) |
申请公布日期 |
1989.05.02 |
申请号 |
US19860945109 |
申请日期 |
1986.12.19 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
EHLERS, BERND;RENELT, GERHARD |
分类号 |
H04N1/405;G06T3/40;H04N1/40;(IPC1-7):H04N1/40;H04N1/393 |
主分类号 |
H04N1/405 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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