Method and apparatus for reducing coding artifacts of block-based image encoding and object-based image encoding

摘要

A method and apparatus for enhancing decoded images which have been encoded checks the neighboring picture elements of a picture element which are located in the region of the picture element to see whether the brightness values and/or the color values of the neighboring picture elements is similar enough to brightness values and/or color values of the picture element in question according to a similarity criterion such as a threshold. When the similarity is within the threshold, then the corresponding neighboring picture element is taken into consideration in determining a new brightness value for the picture element in question. Neighboring picture elements are taken into consideration when the neighboring picture element and the picture element are located in different image blocks of the image which has been decoded from a block- based encoding process. Neighboring picture elements are not taken into consideration when the neighboring picture element and the picture element are located in different objects of the image which has been decoded from an object-based image encoding process.