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[25802] Artykuł: Zonal Compression of Greyscale Images Using Walsh and PWL TransformsCzasopismo: R.S. Romaniuk (Red.), Proc. of XVI IEEE-SPIE Symposium on Electronics for High Energy Physics, Photonics and Web Engineering, Wilga 2007. Tom: 6937, Strony: U9372-U9372ISSN: 0277-786X ISBN: 978-0-8194-7124-6 Wydawca: SPIE-INT SOC OPTICAL ENGINEERING, 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA Opublikowano: 2007 Seria wydawnicza: PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Materiały z konferencji międzynarodowej (zarejestrowane w Web of Science) Punkty MNiSW: 0 Klasyfikacja Web of Science: Proceedings Paper Web of Science Keywords: image compression  lossy compression methods  zonal compression  piecewise-linear transforms  transform compression  |
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.