The JPEG still picture compression standard
Communications of the ACM - Special issue on digital multimedia systems
Fractal image compression: theory and application
Fractal image compression: theory and application
Fractal Geometry in Digital Imaging
Fractal Geometry in Digital Imaging
Orthogonal Transforms for Digital Signal Processing
Orthogonal Transforms for Digital Signal Processing
A review of the fractal image coding literature
IEEE Transactions on Image Processing
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The paper presents a new attempt to speed up fractal image encoding. The range blocks and corresponding domain blocks are categorized depending on their smoothness parameter values (smoothness estimates), introduced, from the first, to characterize manifestation of high frequency components in the image. The searching of the best matched domain block is carried out between the neighbouring (or, within the same) smoothness classes. The computational complexity of the fractal image encoding process is reduced considerably. Theoretical and experimental investigations show that extremely high compression time savings are achieved for images of size 512x512.