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Invention Publication
CN1856013A 珈玛校正的方法及系统 有权 转让

珈玛校正的方法及系统
Abstract:
本发明提出一种珈玛校正的方法及系统，以对一视频信号进行珈玛校正以产生一珈玛校正值，先将该视频信号值经由一索引对应(index mapping)而分别获得一第一主索引值及一第一子索引值。由第一主索引值及第一子索引值经查表获得一第一珈玛值。其次，将第一珈玛值经由一索引对应分别获得一第二主索引值及一第二子索引值。再由第二主索引值及第二子索引值经查表获得若干个临界值。最后，对比视频信号值与若干个临界值，以修正第一珈玛值，以产生该珈玛校正值。
Abstract(English):

A gamma adjusting method and system, processes the gamma adjustment of a video signal to create a gamma adjusting value, the video signal gets a first main index value and a first sub-index value respectively by a index mapping. The first main index value and the first sub-index value gets a first gamma value by checking the table. Next, the first gamma value gets a second main index value and a second sub-index value by an index mapping. The second main index value and the second sub-index value get several critical values by checking the table. Finally, compares the video signal value and several critical values to correct the first gamma value and create the gamma adjusting value.

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