In this paper an edge preserving lossy image coder is presented. An edge image is obtained from the original with a digital image processing module using four different filters: Canny, Sobel, Roberts and Prewitt, then the original image is domain transformed with wavelets or contourlets, and a pixel mapping from original domain to transformed is done. For the compression, the edges points and the approximation image (which determines the compression factor) are selected; finally the image is decompressed in order to observe the reconstruction quality and edge preserving. Additionally, the results obtained from comparisons of error measures between original and decompressed images are shown and finally conclusions about the coder are presented.
Edge Preserving Lossy Image Compression with Wavelets and Contourlets
2006-09-01
738933 byte
Conference paper
Electronic Resource
English
Lossy dictionary-based image compression method
British Library Online Contents | 2007
|Data compression with spherical wavelets and wavelets for the image-based relighting
British Library Online Contents | 2004
|