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Visual object-oriented shape coding method

A technology of shape coding and visual objects, which is applied in the field of coding, can solve problems such as unsatisfactory coding performance, and achieve the effect of improving coding efficiency and coding performance

Active Publication Date: 2013-09-18
ZHEJIANG WANLI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

DSLSC 2 After the method is applied to the shape coding of visual objects, the coding efficiency is improved, and the coding performance is higher than traditional methods such as JBIG, JBIG2 and MPEG-4CAE. However, in the application field with high precision requirements, its coding performance is still not ideal

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] A visual object-oriented shape coding method, its flow chart is as follows figure 1 As shown, it specifically includes the following steps:

[0035] (1) Set the pixel values ​​of the object and the background area of ​​a given shape image to 0 and 255 respectively to form a binary shape image, and perform contour extraction on the binary shape image to obtain a binary contour image. Expressed as:

[0036] C ( x , y ) = 0 | f ( x , y ) | + | ...

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Abstract

The invention discloses a visual object-oriented shape coding method. The visual object-oriented shape coding method comprises the steps of extracting shape contour, cutting the contour curve, coding curve segments and curve subsegments and the like, and specially comprises the steps of aiming at a visual object, extracting the object contour and refining the contour into a single-pixel contour curve, cutting the target contour curve into a plurality of curve segments, then cutting each curve segment into a plurality of curve subsegments, then finishing the coding operation of the curve subsegments in all the curve segments, thus obtaining the compressed code flow of a two-value shape image of the overall visual object. The visual object-oriented shape coding method has the advantages that each directional code is represented only by bit codes through contour refinement and curve segment cutting, and the coding efficiency and the coding performance can be effectively improved.

Description

technical field [0001] The invention relates to a coding method, in particular to a visual object-oriented shape coding method. Background technique [0002] With the rapid development of computer and network technology, visual object-oriented processing technology in the field of image and video has received more and more attention, such as object-based coding technology, object-based retrieval and interaction technology, etc. Compared with traditional technologies, Visual object-oriented processing technology can achieve better performance and meet higher application requirements. The visual object-oriented processing technology divides the image into objects with different visual interests. Using the visual object as the coding unit, it can perform differential coding according to the visual perception importance of different objects, thereby improving the reconstruction speed after coding at a given bit rate. The subjective visual effect of an image. Shape information ...

Claims

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Application Information

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IPC IPC(8): H04N7/26
Inventor 朱仲杰王玉儿
Owner ZHEJIANG WANLI UNIV