算法对其中一个分量进行完整dct变换，对其他两个分量只求少数几个非零系数。
In RGB color space, coded one of the three color components of a color image using DCT coding, the other two components only asked the minority several effective coefficients.
算法对其中一个分量进行完整dct变换，对其他两个分量只求少数几个非零系数。
In RGB color space, coded one of the three color components of a color image using DCT coding, the other two components only asked the minority several effective coefficients.
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