Transform image coding with global thresholding: Application to baseline JPEG

In this paper, we present an image-adaptive joint photographers expert group encoding algorithm that incorporates global thresholding based on the statistical information of the discrete cosine transform (DCT) coefficient distributions. These statistics are also used to construct rate/distortion-spe...

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Bibliographic Details
Published in:Pattern recognition letters 2003-04, Vol.24 (7), p.959-964, Article 959
Main Authors: Ouled Zaid, Azza, Olivier, Christian, Alata, Olivier, Marmoiton, Francois
Format: Article
Language:English
Subjects:
DCT image coding
Global thresholding
Information criteria
Statistic modeling
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Summary:In this paper, we present an image-adaptive joint photographers expert group encoding algorithm that incorporates global thresholding based on the statistical information of the discrete cosine transform (DCT) coefficient distributions. These statistics are also used to construct rate/distortion-specific quantization tables with nearly optimal tradeoffs. Results on natural and SPOT images demonstrate that the proposed thresholding technique improves the reconstructed image quality compared to that provided by other DCT image coding schemes without thresholding.
ISSN:0167-8655
1872-7344
DOI:10.1016/S0167-8655(02)00219-2