发明名称 |
Shadow Removal in an Image Captured by a Vehicle-Based Camera for Clear Path Detection |
摘要 |
A method for is provided for creating a shadow-reduced image from a captured image for distinguishing a clear path of travel. Each pixel of a captured input image is plotted according to a two dimensional logarithmic graph. A specific color set relating to an associated color value of a clear path. A linear illumination-invariant axis is determined as a function of the specific color set. An illumination direction for the linear illumination-invariant axis is determined. A log-chromaticity value of each plotted pixel of the specific color set is projected on the axis. Edges in the input image and the illumination-invariant image domain are identified. The identified edges of the input image are compared to identify edges in the illumination-invariant image domain. A determination is made whether a shadow edge is present in response to comparing the edges. A shadow-reduced image is generated for scene analysis by a vehicle vision-based system. |
申请公布号 |
US2012008021(A1) |
申请公布日期 |
2012.01.12 |
申请号 |
US20100830525 |
申请日期 |
2010.07.06 |
申请人 |
ZHANG WENDE;WU QI;BHAGAVATULA VIJAYAKUMAR;GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
ZHANG WENDE;WU QI;BHAGAVATULA VIJAYAKUMAR |
分类号 |
H04N9/64 |
主分类号 |
H04N9/64 |
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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