摘要 |
A method for compressing an image, characterised in that it involves; calculating a level of hues of the image over at least all of one layer of the image; then, depending on the type of hues of said representative layer, classifying the image in one of the following three categories; a first category if the image is of a graphic type; a second category if the image is of a highly contrasted type; a third category if the image is of a weakly contrasted type; and choosing a compression processing type depending on the category of the image: difference processing, if the image is of the first category; frequency processing, preferably using wavelets, if the image is of the third category; and, if the image is of the second category: for lossless or low-loss compression, preferably using difference processing, and, in the other cases, preferably using frequency processing, preferably using wavelets. |
申请人 |
SAS I-CES (INNOVATIVE COMPRESSION ENGINEERING SOLUTIONS) |
发明人 |
GERVAIS, THAN MARC-ERIC;LOUBET, BRUNO;BESSOU, NICOLAS;GUIMIOT, YVES;PETITFILS, MICKAEL;ROQUES, SEBASTIEN |