The JPEG still picture compression standard
Communications of the ACM - Special issue on digital multimedia systems
Fractal image compression
Image compression: a study of the iterated transform method
Signal Processing
Fractal image compression: theory and application
Fractal image compression: theory and application
Image Processing: Mathematical Methods and Applications
Image Processing: Mathematical Methods and Applications
A review of the fractal image coding literature
IEEE Transactions on Image Processing
Fast fractal image encoding based on adaptive search
IEEE Transactions on Image Processing
Image coding based on a fractal theory of iterated contractive image transformations
IEEE Transactions on Image Processing
Image coding using wavelet transform
IEEE Transactions on Image Processing
A fast classification based method for fractal image encoding
Image and Vision Computing
Novel fractal image encoding algorithm using normalized one-norm and kick-out condition
Image and Vision Computing
A robust hybrid method for image encryption based on Hopfield neural network
Computers and Electrical Engineering
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In this paper we present a fast fractal encoding method based on an intelligent search of a Standard Deviation (STD) value between range and domain blocks. First, we describe the basic fractal image compression theory and an improved bit allocation scheme for Jacquin's Iterated Function System (IFS) parameter. Experimental results show that using a Fixed Scale Parameter (FSP) can shorten encoding time without significantly affecting reconstructed image quality. Second, we present a search algorithm based on the STD introduced by Tong. We enhance Tong's STD search algorithm by introducing a domain Intelligent Classification Algorithm (ICA) based on STD-classified domain blocks. The domain block search pool is pruned by eliminating multiple domain blocks with similar STD values. We refer to this pruning as the De-Redundancy Method (DRM). The domain search process is adaptive with the range block STD value of interest controlling the size of the domain pool searched. We refer to this process as the Search Number Adaptive Control (SNAC). Finally, we present experimental results showing the efficiency of the proposed method, noting a significant improvement over Tong's original STD method without significant loss in the reconstructed image quality.