发明名称 |
Gradation correction method and device |
摘要 |
The gradation correction device includes a luminance signal convertor to generate a luminance signal from the input R, G, B signals, a correction coefficient calculator which calculates the ratio to the luminance signal of the luminance signal after gamma correction to the predetermined gradation characteristics, and a multipliers to multiply the output from the correction coefficient calculator by each of the R, G, and B input signals. When the gradation correction is applied, effective brightness adjustment can be applied with no change in hue and saturation and without exceeding the dynamic range of a device.
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申请公布号 |
US5661575(A) |
申请公布日期 |
1997.08.26 |
申请号 |
US19940366028 |
申请日期 |
1994.12.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YAMASHITA, HARUO;ISHIHARA, HIDESHI;MATSUMOTO, YASUKI |
分类号 |
G03F3/00;H04N1/40;H04N1/407;H04N1/46;H04N1/48;H04N9/64;H04N9/69;(IPC1-7):H04N5/202 |
主分类号 |
G03F3/00 |
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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