发明名称 |
Contrast enhancement for digital images |
摘要 |
An adaptive histogram equalization method is introduced which allows the histogram equalization amount to automatically adapt to the original image contrasts, which can be measured from the originals. Contrast over-enhancement is avoided by limiting the spatial frequency response of the histogram. Besides that, methods to remedy the brightness change problem encountered by histogram equalization are described. <IMAGE>
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申请公布号 |
EP1345172(A1) |
申请公布日期 |
2003.09.17 |
申请号 |
EP20020004428 |
申请日期 |
2002.02.26 |
申请人 |
SONY INTERNATIONAL (EUROPE) GMBH |
发明人 |
LEI, ZHICHUN;SARTOR, PIERGIORGIO;INESCU, YALCIN;WAGNER, PETER |
分类号 |
G06T5/00;G06K9/00;G06K9/36;G06K9/40;G06T5/10;G06T5/20;G06T5/40;H04N1/407;H04N5/20;(IPC1-7):G06T5/40 |
主分类号 |
G06T5/00 |
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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