METHOD, DEVICE AND SYSTEM FOR COMPRESSING AND DECOMPRESSING TRANSPARENT IMAGE

摘要

A method, device and system for compressing and decompressing a transparent image are provided by the present invention, which belongs to the field of digital image. The method includes: obtaining the color channel information and the transparency channel information of the original transparent image (101); performing lossy compression to the color channel information to get color channel compression information, and performing lossless compression to the transparency channel information to get the transparency channel compression information (102); performing compression data synthesization of the color channel compression information and the transparency channel compression information to get compressed transparent image (103). By performing lossless compression to the transparency channel information of transparent image, performing lossy compression to the information of each color channel, and organizing the compressed transparency channel information and the color channel information in a special format, the solution provided by the embodiment of the present invention can reduce the redundancy contained in the image information extremely. The compression efficiency of the transparent image is improved, and the subjective quality of the image is not reduced obviously.