METHOD FOR CODING A SEQUENCE OF DIGITAL IMAGES

摘要

A method for coding a sequence of digital images The invention refers to a method for coding a sequence of digital images (I), wherein the method uses a number of prediction modes for predicting values of pixels (P1) in the images (I) based on reconstructed values of pixels in image areas processed previously, where a prediction error (PE) between predicted values and the original values of pixels (P1) is processed for generating the coded sequence of digital images (CI). The invention is characterized in that a preset prediction mode is an intra-prediction mode based on pixels of a single image (I) and comprises steps i) and ii) as follows. In step i), for a region (R) of pixels with reconstructed values in the single image (I) and for a template (TE) of an image area, a first patch (PA1) of pixels in the region (R) which surround a first pixel (P1) to be predicted based on the template (TE) is compared with several second patches (PA2), each second patch (PA2) being assigned to a second pixel (P2) from a plurality of second pixels (P2) in the region (R) and consisting of pixels in the region (R) which surround the second pixel (P2) based on the template (TE), thereby determining a similarity measure (SM) for each second pixel (P2) describing the similarity between reconstructed values of the pixels of the second patch (PA2) assigned to the respective second pixel (P2) and the reconstructed values of the pixels of the first patch (PA1). In step ii), a predicted value of the first pixel (P1) is deter-mined based on the values of one or more second pixels (P2) which have the highest similarity described by the similarity measure (SM) among all second pixels (P2) of the plurality of second pixels (P2) in the region (R).

主权项

1. A method for coding a sequence of digital images (I), wherein the method uses a number of prediction modes for predicting values of pixels (P1) in the images (I) based on reconstructed values of pixels in image areas processed previously, where a prediction error (PE) between predicted values and the original values of pixels (P1) is processed for generating the coded sequence of digital images (CI);
wherein a preset prediction mode is an intra-prediction mode based on pixels of a single image (I), in which preset prediction mode i) for a region (R) of pixels with reconstructed values in the single image (I) and for a template (TE) of an image area, a first patch (PA1) of pixels in the region (R) which surround a first pixel (P1) to be predicted based on the template (TE) is compared with several second patches (PA2), each second patch (PA2) being assigned to a second pixel (P2) from a plurality of second pixels (P2) in the region (R) and consisting of pixels in the region (R) which surround the second pixel (P2) based on the template (TE), thereby determining a similarity measure (SM) for each second pixel (P2) describing the similarity between reconstructed values of the pixels of the second patch (PA2) assigned to the respective second pixel (P2) and the reconstructed values of the pixels of the first patch (PA1); ii) a predicted value of the first pixel (P1) is determined based on the values of one or more second pixels (P2) which have the highest similarity described by the similarity measure (SM) among all second pixels (P2) of the plurality of second pixels (P2) in the region (R).