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Image symmetry axis detection method based on edge line matching

A detection method and edge line technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as detection of image symmetry axis

Active Publication Date: 2017-05-31
广西赛联信息科技股份有限公司
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Problems solved by technology

If the image has fewer feature points or some feature points are missing, the above method cannot be used to detect the image symmetry axis well.

Method used

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  • Image symmetry axis detection method based on edge line matching
  • Image symmetry axis detection method based on edge line matching
  • Image symmetry axis detection method based on edge line matching

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Embodiment

[0066] figure 1 is a symmetrical image to be detected, which is calculated by the above method of the present invention figure 1 Matching edge lines such as figure 2 As shown, the four line segments (a)(b)(c)(d) are matching edge lines. The equidistance between the points to be matched is d. When the number of points on the edge line is large, if the value of d is small, the number of matching points will be more, which not only affects the calculation speed but also may contain more concave-convex points in the matching points, resulting in false matching. , if the value of d is too large, the number of matching points obtained is too small, resulting in less useful information, and the image symmetry axis cannot be detected well. When the number of points of the edge line is small, the value of d is too large or too small will affect the image symmetry axis detection. Therefore the present invention has carried out a large number of experiments, according to the differen...

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Abstract

The invention discloses an image symmetry axis detection method based on edge line matching. The method comprises the following steps: extracting an edge line of a to-be-detected image, and processing the edge line; calculating image matching edge lines; determining matching points of the image matching edge lines, and calculating a matching point set of each line in the matching edge lines; performing reflection transformation on the edge lines to obtain to-be-matched curves; and calculating matching points of the matching point set and the to-be-matched curves under translation rotation transformation, and determining an image symmetry axis through the matching points. By adoption of the image symmetry axis detection method disclosed by the invention, the image symmetry axis can be well detected, and the detection efficiency is relatively high.

Description

technical field [0001] The invention relates to the fields of image processing and pattern recognition, computational geometry and computer vision, in particular to an image symmetry axis detection method based on edge line matching. Background technique [0002] As an important feature of objects, symmetry has become an important research topic in the fields of pattern recognition, computational geometry and computer vision, and has been widely used in medical diagnosis, cultural relic protection, aerospace and other aspects. Important theoretical significance and application value. For example, in various plastic surgery applications, the evaluation and quantification are based on the imaging of symmetrical organs, and the correction of organs is achieved through the axis of symmetry. In the field of cultural relics protection, damaged cultural relics can be repaired according to the symmetry axis of the object. [0003] At present, researchers have given some feasible m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/13G06T7/68G06T7/00
Inventor 张显全王博俞春强唐振军
Owner 广西赛联信息科技股份有限公司
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