Reduction of blocking artifacts in JPEG compressed images
Digital Signal Processing
Design a deblocking filter with three separate modes in DCT-based coding
Journal of Visual Communication and Image Representation
Deblocking filtering method using a perceptual map
Image Communication
Image postprocessing by Non-local Kuan's filter
Journal of Visual Communication and Image Representation
No-reference analysis of decoded MPEG images for PSNR estimation and post-processing
Journal of Visual Communication and Image Representation
Porting a H264/AVC adaptive in loop deblocking filter to a TI DM6437EVM DSP
ICISP'12 Proceedings of the 5th international conference on Image and Signal Processing
A generic post-deblocking filter for block based image compression algorithms
Image Communication
A training-based method for reducing ringing artifact in BDCT-encoded images
EGMM'04 Proceedings of the Seventh Eurographics conference on Multimedia
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The authors propose an iterative block reduction technique based on the theory of a projection onto convex sets. The idea is to impose a number of constraints on the coded image in such a way as to restore it to its original artifact-free form. One such constraint can be derived by exploiting the fact that the transform-coded image suffering from blocking effects contains high-frequency vertical and horizontal artifacts corresponding to vertical and horizontal discontinuities across boundaries of neighboring blocks. Another constraint has to be with the quantization intervals of the transform coefficients. Specifically, the decision levels associated with transform coefficient quantizers can be used as lower and upper bounds on transform coefficients, which in turn define boundaries of the convex set for projection. A few examples of the proposed approach are presented