发明名称 |
A HISTOGRAM EQUALIZATION APPARATUS FOR CONTRAST ENHANCEMENT OF MOVING IMAGE AND METHOD THEREFOR |
摘要 |
A histogram equalization apparatus for contrast enhancement of a moving image includes a CDF calculator for counting the number of pixels having a gray level from the minimum to the maximum or less with respect to an input image in a frame unit to calculate a cumulative distribution function (CDF) value of each gray level, and a look-up table for updating histogram-equalized level corresponding to each gray level of the input moving image in a frame unit based on the CDF value of each gray level, and outputting a corresponding histogram-equalized level according to a level of the input moving image. Therefore, the histogram equalization apparatus can perform real-time histogram equalization on a moving image with a simple hardware, without using a frame memory, a probability density function (PDF) calculator and dividers for a cumulative density function (CDF) calculation.
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申请公布号 |
WO9749064(A1) |
申请公布日期 |
1997.12.24 |
申请号 |
WO1997KR00116 |
申请日期 |
1997.06.17 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD.;PARK, YUNG, JUN |
发明人 |
PARK, YUNG, JUN |
分类号 |
H04N5/20;G06T5/00;G06T5/40;H04N1/407;H04N5/202;(IPC1-7):G06T5/40 |
主分类号 |
H04N5/20 |
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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