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A study of deep image compression for YUV420 color space

Currently, most deep image compression methods are designed to compress images in RGB color space. However, there are also many images in YUV420 color space and the video coding standards such as H.265/HEVC and H.266/VVC support compression of images in YUV420 color space with their respective Main Still Picture profiles. In this paper, we first study how to adjust the deep compression frameworks designed for images in RGB color space to compress images in YUV420 color space. Then, we study the coding performance impact when we adjust the training distortion weight for YUV channels and compare the experimental results with HEVC and VVC all intra configuration. The proposed approaches are applicable in both image compression and intra coding in video compression.