Multi-wedgelet image approximation method based on boundary scanning

A technology of boundary scan and approximation method, which is applied in the field of image processing, can solve problems such as large errors, achieve high fitting accuracy and fitting speed, reduce errors, and enhance the effect of transformation

Active Publication Date: 2019-10-22
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] But only using straight lines to divide the image sub-blocks, when encoding the approximate image, although a small bit can be used to represent the approximation of the entire image, the error is very large, or the peak signal to noise ratio (Peak Signal to NoiseRatio, PSNR ) is very large

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  • Multi-wedgelet image approximation method based on boundary scanning
  • Multi-wedgelet image approximation method based on boundary scanning
  • Multi-wedgelet image approximation method based on boundary scanning

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Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0040] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a multi- wedgelet image approximation method based on boundary scanning, and relates to the technical field of image processing. The method can be applied to flexible divisionof coding units during video coding, division and intra-block prediction are carried out on image blocks based on multiple Wedgelets, the method is a supplement to existing image block prediction, andthe method comprises the following steps: the Step 1, performing image blocking; the step 2, counting boundary point information of the image blocks; the Step 3, performing multi-edge multi-line fitting; the Step 4, solving an approximate block of the image block; and the Step 5, solving an approximate image. According to the method disclosed by the invention, the image is fitted by utilizing various shapes, so that the function of approaching the image is quickly obtained, and the image fitting precision can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a boundary-scan-based multi-wedgelet image approximation method. Background technique [0002] At present, for image fitting, the traditional Wedgelet transform algorithm is often used. The traditional Wedgelet transform divides an image sub-block into two wedges with a line segment, and each wedge is represented by a unique gray value. The position of the line and the two gray values ​​approximately describe the nature of the sub-block. [0003] But only using straight lines to divide the image sub-blocks, when encoding the approximate image, although a small bit can be used to represent the approximation of the entire image, the error is very large, or the peak signal to noise ratio (Peak Signal to NoiseRatio, PSNR ) is very large. [0004] In order to reduce the approximation error, the traditional Wedgelet transform algorithm can no longer meet the requirements of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06V10/751
Inventor 段昶罗兴奕杨卓蒋琳娜
Owner SOUTHWEST PETROLEUM UNIV
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