Enhancement of inter-frame coded images based on convex projection

We propose a degradation model for blocking artifacts in inter-frame coded images and a corresponding image restoration algorithm based on convex projection for reducing blocking artifacts. In contrast to still images, inter-frame coded moving images have two kinds of blocking artifacts. One occurs...

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Bibliographic Details
Published inProceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030) Vol. 2; pp. 1275 - 1278 vol.2
Main Authors Shi Chang Jung, Hun Bae Woo, Joon Ki Paik, Young Wan Choi
Format Conference Proceeding
LanguageEnglish
Published IEEE 1999
Subjects
Degradation
Discrete cosine transforms
Electronic mail
Image reconstruction
Image restoration
Mathematical model
Motion compensation
Motion estimation
Quantization
Video coding
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Summary:We propose a degradation model for blocking artifacts in inter-frame coded images and a corresponding image restoration algorithm based on convex projection for reducing blocking artifacts. In contrast to still images, inter-frame coded moving images have two kinds of blocking artifacts. One occurs on the block boundary, which is caused by quantization of block discrete cosine transform (BDCT) coefficients. The other occurs in the interior of the block, which is caused by motion compensation from the previous blocky image. Those properties are used to define convex sets, which specify a priori constraints of the estimated images. In other words, both on the block boundary and in the interior of the block, differential images must have discontinuity in opposite direction to the previous motion compensated image.
ISBN:0780357396
9780780357396
DOI:10.1109/TENCON.1999.818661