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Compression-dependent transform-domain downward conversion for block-based image coding
Zhu S.2; He Z.2; Meng X.1; Zhou J.3; Zeng B.1
2018-06-01
Source PublicationIEEE Transactions on Image Processing
ISSN10577149
Volume27Issue:6Pages:2635-2649
Abstract

Transform-domain downward conversion (TDDC) for image coding is usually implemented by discarding some high-frequency components from each transformed block. As a result, a block of fewer coefficients is formed, and a lower compression cost is achieved due to the coding of only a few low-frequency coefficients. In this paper, we focus on the design of a new TDDC-based coding method by using our proposed interpolationcompression directed filtering (ICDF) and error-compensated scalar quantization (ECSQ), leading to the compression-dependent TDDC (CDTDDC)-based coding. More specifically, ICDF is first used to convert each 16 × 16 macro-block into an 8 × 8 coefficient block. Then, this coefficient block is compressed with ECSQ, resulting in a smaller compression distortion for those pixels that locate at some specific positions of a macro-block. We select these positions according to the 4:1 uniform sub-sampling lattice and use the pixels locating at them to reconstruct the whole macro-block through an interpolation. The proposed CDTDDC-based coding can be applied to compress both grayscale and color images. More importantly, when it is used in the color image compression, it offers not only a new solution to reduce the data-size of chrominance components but also a higher compression efficiency. Experimental results demonstrate that applying our proposed CDTDDC-based coding to compress still images can achieve a significant quality gain over the existing compression methods.

KeywordDistortion Image Coding Interpolation Quantization Sub-sampling
DOI10.1109/TIP.2018.2806281
URLView the original
Indexed BySCI
Language英语
WOS Research AreaComputer Science ; Engineering
WOS SubjectComputer Science, Artificial Intelligence ; Engineering, Electrical & Electronic
WOS IDWOS:000427637600003
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Affiliation1.Hong Kong University of Science and Technology
2.University of Electronic Science and Technology of China
3.Universidade de Macau
Recommended Citation
GB/T 7714
Zhu S.,He Z.,Meng X.,et al. Compression-dependent transform-domain downward conversion for block-based image coding[J]. IEEE Transactions on Image Processing,2018,27(6):2635-2649.
APA Zhu S.,He Z.,Meng X.,Zhou J.,&Zeng B..(2018).Compression-dependent transform-domain downward conversion for block-based image coding.IEEE Transactions on Image Processing,27(6),2635-2649.
MLA Zhu S.,et al."Compression-dependent transform-domain downward conversion for block-based image coding".IEEE Transactions on Image Processing 27.6(2018):2635-2649.
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