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High-Quality Color Image Compression by Quantization Crossing Color Spaces
Shuyuan Zhu1; Zhiying He1; Chen Chen2; Shuaicheng Liu1; Jiantao Zhou3; Yuanfang Guo4; Bing Zeng1
2018-05-28
Source PublicationIEEE Transactions on Circuits and Systems for Video Technology
ISSN1051-8215
Abstract

Coding of a color image usually happens in the YCbCr space so that the rate-distortion optimization is conducted in this space. Due to the use of a non-unitary matrix in the RGBto-YCbCr conversion, an optimal coding performance achieved in the YCbCr space does not guarantee an optimal quality in the RGB space, which would impact most display devices that need RGB signals as the inputs. In this paper, we first study the relationship between the coding distortions of the compressed RGB signals and the quantization errors occurred in the coded YCbCr signals. Then, we design a new quantization scheme crossing the RGB and YCbCr spaces to achieve a high-quality color image compression with the YCbCr 4:4:4 format. Although our proposed quantization takes place in the YCbCr space, it aims at reducing the coding distortion in the RGB space as much as possible. Experimental results demonstrate that our proposed method offers a significant quality gain over the existing blockbased coding methods for various images

KeywordColor Image Compression Rgb Space Ycbcr Space Error Compensation
DOIhttp://doi.org/10.1109/TCSVT.2018.2841642
Language英语
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Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Affiliation1.School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, China
2.Tencent Company Ltd., Shenzhen, China
3.Faculty of Science and Technology, University of Macau, Macau, China
4.the State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China, and also with the Science and Technology on Information Assurance Laboratory, Beijing, China
Recommended Citation
GB/T 7714
Shuyuan Zhu,Zhiying He,Chen Chen,et al. High-Quality Color Image Compression by Quantization Crossing Color Spaces[J]. IEEE Transactions on Circuits and Systems for Video Technology,2018.
APA Shuyuan Zhu.,Zhiying He.,Chen Chen.,Shuaicheng Liu.,Jiantao Zhou.,...&Bing Zeng.(2018).High-Quality Color Image Compression by Quantization Crossing Color Spaces.IEEE Transactions on Circuits and Systems for Video Technology.
MLA Shuyuan Zhu,et al."High-Quality Color Image Compression by Quantization Crossing Color Spaces".IEEE Transactions on Circuits and Systems for Video Technology (2018).
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