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Paper details
Number 1 - March 2004
Volume 14 - 2004
Gradient flow optimization for reducing blocking effects of transform coding
Feng Gao, Xiaokun Li, Xun Wang, William G. Wee
Abstract
This paper addresses the problem of reducing blocking effects in transform coding. A novel optimization approach using the gradient flow is proposed. Using some properties of the gradient flow on a manifold, an optimized filter design method for reducing the blocking effects is presented. Based on this method, an image reconstruction algorithm is derived. The algorithm maintains the fidelity of images while reducing the blocking effects. Experimental tests demonstrate that the presented algorithm is effective.
Keywords
gradient flow, blocking effects, optimization, transform coding