Color Image coding Apparatus and Method Using Object-based Spectral Correlation Estimator

摘要

The present invention is in proportion to the approximate square error between the extracted shape information of each object by performing domain decomposition in view of the spectral correlation inherent between color component image, a luminance image and the R, B image in object units is minimized factor and acceleration by calculating a factor then bit them to streamed by about the image encoded using an object-based spectral correlation estimator, the image encoding new type of object-based color way to estimate coding a color component image from the luminance image method will be.; For the EBCOT algorithm JEPG2000 being evaluated to provide a very high extrusion rate in a conventional codec, usually at least PSNR 25dB, 500 for the color difference image (Cb, Cr): On the other hand, the compressed at least one non-of the present invention the method on average, 1000: it was confirmed a high compression is available to the first through the computer simulation results: 1 up to 5000. In addition, while conventional color image compression method is to degrade a lot of contours and a high frequency range, the method of the present invention provide excellent performance in the subjective quality assessment in accordance with the clearance to effectively reproduce the locus (contour) of the sensitive object in the human visual there are advantages to.