Fundamentals of digital image processing
Fundamentals of digital image processing
Neural Networks: A Comprehensive Foundation
Neural Networks: A Comprehensive Foundation
Projection-based spatially adaptive reconstruction of block-transform compressed images
IEEE Transactions on Image Processing
Reduction of blocking artifact in block-coded images using wavelet transform
IEEE Transactions on Circuits and Systems for Video Technology
A deblocking filter with two separate modes in block-based video coding
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
MLP for adaptive postprocessing block-coded images
IEEE Transactions on Circuits and Systems for Video Technology
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In this paper, we propose a novel post-filtering algorithm to reduce the blocking artifacts in block-based coded images using block classification and feedforward neural network. This algorithm exploited the nonlinearity property of the neural network learning algorithm to reduce the blocking artifacts more accurately. At first, each block is classified into four classes; smooth, horizontal edge, vertical edge, and complex blocks, based on the characteristic of their discrete cosine transform (DCT) coefficients. Thereafter, according to the class information of the neighborhood block, adaptive feedforward neural network is then applied to the horizontal and vertical block boundaries. That is, for each class a different multi-layer perceptron (MLP) is used to remove the blocking artifacts. Experimental results show that the proposed algorithm produced better results than those of the conventional algorithms both subjective and objective viewpoints.