Method for image processing and apparatus for implementing the same

An apparatus, the apparatus comprising a processor and a memory operatively coupled to the processor, wherein the apparatus is configured to perform a method of processing an image, comprising:

• extracting from the image a plurality of component images comprising a first chroma component image and a second chroma component image;
• dividing each of the plurality of component images into respective sets of component pixel blocks, and define respective processing sequences of the component pixel blocks of the sets of component pixel blocks;
• for a current chroma component pixel block of the respective set of component pixel blocks of the first and/or second chroma component image, performing an intra mode prediction method to obtain one or more intra prediction modes for the current chroma component pixel block, wherein the intra mode prediction method comprises, for the current chroma component pixel block:
• determining an application area comprising a set of at least one pixel in at least one pixel block of one of the plurality of component images, wherein the at least one pixel block has already been processed according to a respective processing sequence defined for the one of the plurality of component images;
• performing a gradient analysis on at least one pixel of the application area;
• selecting, based on results of the gradient analysis, at least one intra prediction video coding mode among a plurality of intra prediction video coding modes usable for encoding and/or decoding the current chroma component pixel block.

A non-transitory computer-readable medium encoded with executable instructions which, when executed, causes an apparatus comprising a processor operatively coupled with a memory, to perform a method of processing an image, comprising:

• extract from the image a plurality of component images comprising a first chroma component image and a second chroma component image;
• divide each of the plurality of component images into respective sets of component pixel blocks, and define respective processing sequences of the component pixel blocks of the sets of component pixel blocks;
• for a current chroma component pixel block of the respective set of component pixel blocks of the first and/or second chroma component image, perform an intra mode prediction method to obtain one or more intra prediction modes for the current chroma component pixel block, wherein the intra mode prediction method comprises, for the current chroma component pixel block:
• determining an application area comprising a set of at least one pixel in at least one pixel block of one of the plurality of component images, wherein the at least one pixel block has already been processed according to a respective processing sequence defined for the one of the plurality of component images;
• performing a gradient analysis on at least one pixel of the application area;
• selecting, based on results of the gradient analysis, at least one intra prediction video coding mode among a plurality of intra prediction video coding modes usable for encoding and/or decoding the current chroma component pixel block.