发明名称 |
Histogram stretching apparatus and histogram stretching method for enhancing contrast of image |
摘要 |
A histogram stretching apparatus and a histogram stretching method are disclosed to enhance image contrast by stretching a histogram of an input image within a range of a preset maximum expansion level and a preset minimum expansion level. The histogram stretching apparatus performs proper stretching suitable for a characteristic of the input image in due consideration of a saturation portion and a distribution range of a histogram of the input image. The histogram stretching apparatus can improve stretching effects by removing the saturated portion of the input image, and can prevent image distortion even for a monochromatic image. The histogram apparatus can improve histogram stretching effects by adjusting entire image levels of an image having a histogram frequency distribution skewed to a dark or bright side before a stretching operation. |
申请公布号 |
US8165419(B2) |
申请公布日期 |
2012.04.24 |
申请号 |
US20080238244 |
申请日期 |
2008.09.25 |
申请人 |
MIN KYOUNG JOONG;KIM HAK SUN;CHOI WON TAE;SAMSUNG ELECTRO-MECHANICS CO., LTD. |
发明人 |
MIN KYOUNG JOONG;KIM HAK SUN;CHOI WON TAE |
分类号 |
G06K9/40;G03F3/08;G06K9/00;G09G1/14;G09G3/28;G09G5/00;G09G5/02;G09G5/10;H04N5/202;H04N9/64 |
主分类号 |
G06K9/40 |
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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