发明名称 |
Method and system for reducing speckles in a captured image |
摘要 |
A method for reducing specular reflection in an image. The method includes capturing a first exposure of a scan surface using a first of a plurality of light sources, capturing a second exposure of a scan surface using a second of a plurality of light sources, determining which pixels captured by the light sources are speckles, and replacing a value of at least one speckle in the image with a different pixel value. |
申请公布号 |
US8755627(B2) |
申请公布日期 |
2014.06.17 |
申请号 |
US201113086814 |
申请日期 |
2011.04.14 |
申请人 |
Lexmark International, Inc. |
发明人 |
Sellers Ronald Todd;Thakur Khageshwar;Weed Steven Frank |
分类号 |
G06K9/40;H04N5/217 |
主分类号 |
G06K9/40 |
代理机构 |
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代理人 |
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主权项 |
1. A method for reducing specular reflection in an image, comprising:
turning on a first of a plurality of light sources; capturing a first exposure of a scan surface while the first of the plurality of light sources is turned on; turning off the first of the plurality of light sources and turning on a second of the plurality of light sources different from the first of the plurality of light sources; capturing a second exposure of a scan surface while the second of the plurality of light sources is turned on and the first of the plurality of light sources is turned off; determining which pixels of the first and second exposures captured by the first and second light sources have speckles; and replacing a value of a pixel having been determined as having at least one speckle with a different pixel value, wherein the different pixel value corresponds to a pixel value in an exposure having no speckle plus a smooth difference between neighboring pixels next to the pixel having been determined as having said at least one speckle.
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地址 |
Lexington KY US |