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通过对RGB、YCrCb和可逆JPEG2000三种颜色空间无损压缩方法进行比较,本文给出了在连续的正向和反向变换周期里,对误差进行圆整,误差不会累积的条件,特别是圆整误差在从RGB>YCrCb>RGB的连续周期中不会累积的条件。附加的两位亮度和色度信息可以更好地帮助完成可逆颜色变换,采用YCrCb表示的图像的压缩性能要稍微优于RGB方法表示,但是比采用JPEG2000可逆颜色空间的性能差。本文也研究了近似无损压缩JPEG_LS在连续的压缩与解压周期的累积误差。
By comparing the lossless compression methods of RGB, YCrCb and reversible JPEG2000, this paper presents the condition that the error will not be accumulated during the continuous forward and backward transformation cycles, especially the circle The entire error does not accumulate in successive cycles from RGB> YCrCb> RGB. The additional two bits of luminance and chrominance information are better for reversible color conversion, and the image represented by YCrCb is slightly better for compression than the RGB method, but inferior to JPEG2000 reversible color space. We also study the cumulative error of approximately lossless compressed JPEG_LS over successive compression and decompression cycles.