Method for still image compressing using filter bank based on non-separable wavelet basis
OwnerHiroshi Akimoto, Anatoly A. Ligun +1inventors
InventorsHiroshi Akimoto, Anatoly A. Ligun, Vladyslav F. Babenko
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Abstract
The present invention describes a method for the compression of still images with the The present invention relates to devices for the processing of images, and in particular for the compression of static images to a high degree and the obtaining of a restored image of high image quality. More specifically, the subject of the present application is a method and mathematical device for the construction of a filter bank for the compression of bi-dimensional static images. A digital filter, based on non-separable wavelet bases, is used to provide effectively compressed images of various dimensions and to give results exceeding currently known standards.
Claims1
A method for compressing still images that are stored in electronic media comprising the step of:
- a. selecting the image to be compressed;
- b. selecting the desired degree of compression;
- c. constructing filters, based on the desired degree of compression and physical characteristics of the image, for decomposition of the image by non-seperablen wavelet transformation
- d. transforming the image into an array of frequency coefficients of the pixels by executing one level of decomposition for each of the three filters;
- e. quantizing the values of the frequency coefficients;
- and
- f. encoding the quantized values by run length and arithmetic coding methods;
- whereby the image is restored in the YCbCr format through the use of a pre-designated reconstruction formula;
- and transformed into the RGB palette after reconstruction is complete.
Dependencies are inferred from the claim text.