Method, medium, and filter removing a blocking effect

Abstract

Provided are a method, medium, and filter for removing discontinuity of an image. The filtering method includes determining the direction or gradient on a boundary of a block of an image divided into blocks of a predetermined size, based on pixel distribution between adjacent blocks and filtering the blocks based on the determined direction or gradient.

Description

technical field [0001] Embodiments of the present invention relate to the encoding and decoding of motion picture data, and more particularly to methods, media and filters for removing blocking artifacts. Background technique [0002] It is necessary to encode image data to transmit images over a network with a fixed bandwidth or to store images in a storage medium. Much research has been done to efficiently transmit and store images. Among different image coding methods, transform-based coding is most commonly used, and discrete cosine transform (DCT) is widely used in the field of transform-based image coding. [0003] Among various image coding standards, the H.264 AVC standard applies integer DCT to intra-frame prediction and inter-frame prediction to obtain a high compression rate, and encodes the difference between the predicted image and the original image. Since the information of low importance in the DCT coefficients is discarded after the DCT and quantization ar...

AI Technical Summary

Problems solved by technology

[0010] However, traditional loop filters cannot completely remove blocking artifacts because they are not based on inter-block directions

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