Zonal compression of greyscale images using Walsh and PWL transforms

Dorota Wiraszka; Robert Spadło

doi:10.1117/12.784753

28 December 2007 Zonal compression of greyscale images using Walsh and PWL transforms

Dorota Wiraszka, Robert Spadło

Proceedings Volume 6937, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007; 69372U (2007) https://doi.org/10.1117/12.784753
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007, 2007, Wilga, Poland

Abstract

Results of zonal compression applied for greyscale images with the use of Walsh and PWL transforms have been presented in the paper. Both transforms, belonging to the class of piecewise-linear transforms and the zonal compression method have been described. Zonal compression, based on the selection of a specified zone in the spectral domain, has been performed for various zone shapes. Results of experiments with the use of the described method have been enclosed. Compression effectiveness has been evaluated in the terms of the Mean-Square Error (MSE) and the Peak Signal-to-Noise Ratio (PSNR). Visual evaluation of the reconstructed images has been also taken into account.

Citation Download Citation

Dorota Wiraszka and Robert Spadło "Zonal compression of greyscale images using Walsh and PWL transforms", Proc. SPIE 6937, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007, 69372U (28 December 2007); https://doi.org/10.1117/12.784753

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