发明名称 |
Efficient method of computing gamma correction tables |
摘要 |
An efficient method of computing gamma correction tables of the present invention includes the following steps: determining a gamma correction equation between luminance values produced between two representations; determining at least one polynomial approximation to the gamma correction equation, the at least one polynomial approximation having coefficient values cI; for each coefficient value cI, grouping together all of the coefficient values over a range of gamma and then fitting a polynomial equation to each grouping to get a respective coefficient polynomial equation; computing coefficients for a given value of gamma using the coefficient polynomial equations; computing gamma conversion transformations using the computed coefficients and a simplified mathematical formula; and storing the computed gamma conversion transformations in a gamma correction table.
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申请公布号 |
US6771839(B2) |
申请公布日期 |
2004.08.03 |
申请号 |
US20010789403 |
申请日期 |
2001.02.20 |
申请人 |
SHARP LABORATORIES OF AMERICA, INC. |
发明人 |
WESTERMAN LARRY ALAN |
分类号 |
H04N5/202;G03F3/08;G09G5/10;H04N1/407;(IPC1-7):G06K9/40 |
主分类号 |
H04N5/202 |
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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