Video post-process method and system based on directional filtering and adaptive edge determination

A video post-processing and processing method technology, applied in the field of image processing, can solve problems such as high complexity, unsuitable VLSI hardware implementation, low algorithm complexity, etc., achieve low complexity, remove block effects, and improve video quality.

Inactive Publication Date: 2009-01-07
SCHOOL OF SOFTWARE & MICROELECTRONICS PEKING UNIV
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Problems solved by technology

[0005] In order to overcome the high complexity of most existing video post-processing methods and the disadvantages that are not suitable for VLSI hardware implementation, the present invention proposes a DCT-based processing method, which can not only effectively remove block effects, improve video quality, And the algorithm complexity is low, suitable for VLSI hardware implementation

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  • Video post-process method and system based on directional filtering and adaptive edge determination
  • Video post-process method and system based on directional filtering and adaptive edge determination
  • Video post-process method and system based on directional filtering and adaptive edge determination

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Embodiment Construction

[0017] 1. Inside the block:

[0018] Process such as figure 1 .

[0019] First use the algorithm on the transform block: σ ~ = Σ i = 1 M - 1 | Δ s g i | , Selected threshold σ TH Finally, according to the result obtained by the algorithm, check whether it is greater than σ TH , so that smooth blocks and non-smooth blocks can be distinguished.

[0020] Then use the algorithm for non-smooth blocks: ρ B = | G x ′ B | + | G y ′ B | , ...

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Abstract

The invention discloses a low-complexity video post processing method based on directional wave filtering and a self-adaptive boundary decision, and a system thereof. According to different conditions inside a block and outside the block, different methods are used for processing and an effective algorithm for differentiating the condition of the edge of the block is disclosed. Aiming at different conditions of the edge of the block, a proper wave filter is used for wave filtering, thus a blocking effect can be eliminated and the video quality can be improved. Furthermore, the algorithm has low complexity and is suitably realized by VLSI hardware.

Description

Technical field [0001] The processing method of the present invention relates to image processing for removing block effects after video decompression, in particular to a video post-processing method and system based on directional filtering and adaptive boundary determination. Background technique [0002] At present, there are many kinds of video compression schemes, most of which use DCT algorithm, which is simple and easy to implement, and is suitable for computer processing. However, during the DCT algorithm and the subsequent quantization process, the image loses a lot of information, especially the high-frequency part, resulting in obvious block effects after decompression, which seriously affects the video quality. [0003] Aiming at blocking effect, many video post-processing methods have been proposed at present, but these post-processing methods are generally processed in units of the entire image size, the algorithm is complex, and it is not suitable for VLSI har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/24H04N19/176H04N19/625H04N19/85
Inventor 曹喜信于敦山张兴曹健
Owner SCHOOL OF SOFTWARE & MICROELECTRONICS PEKING UNIV
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