发明名称 |
METHOD AND APPARATUS FOR DETERMINING AN ALPHA VALUE |
摘要 |
A method for determining an alpha value for a candidate pixel of an image in an alpha matting process and an apparatus configured to perform the method are described. A selecting unit selects two or more pairs of foreground pixels and background pixels. A calculating unit calculates for each pair of foreground pixel and background pixel an associated alpha value based on a color of the foreground pixel and a color of the background pixel, as well as a probability function based on the associated alpha value. The probability function is modeled by assuming two or more characteristics of the pixels as statistically independent. A determining unit determines the pair of foreground pixel and background pixel with the highest value of the probability function. A setting unit then sets the alpha value for the candidate pixel to the associated alpha value of the determined pair of foreground pixel and background pixel. |
申请公布号 |
US2014301639(A1) |
申请公布日期 |
2014.10.09 |
申请号 |
US201414245367 |
申请日期 |
2014.04.04 |
申请人 |
THOMSON LICENSING |
发明人 |
SCHLOSSER Markus;Horentrup Jobst;Lacasa Jorge |
分类号 |
G06T7/40;G06K9/46 |
主分类号 |
G06T7/40 |
代理机构 |
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代理人 |
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主权项 |
1. A method for determining an alpha value for a candidate pixel of an image in an alpha matting process, the method comprising:
selecting two or more pairs of foreground pixels and background pixels; for each pair of foreground pixel and background pixel, calculating an associated alpha value based on a color of the foreground pixel and a color of the background pixel; for each pair of foreground pixel and background pixel, calculating a probability function based on the associated alpha value, wherein the probability function is modeled by assuming two or more characteristics of the pixels as statistically independent; determining the pair of foreground pixel and background pixel with the highest value of the probability function; and setting the alpha value for the candidate pixel to the associated alpha value of the determined pair of foreground pixel and background pixel. |
地址 |
Issy de Moulineaux FR |