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Line matching method and line matching system on basis of geometrical relationship

A technology of geometric relationship and matching method, which is applied in the field of image processing, can solve the problems that the accuracy is affected by point matching accuracy and the efficiency of matching algorithm is not high, and achieve the effect of improving efficiency

Active Publication Date: 2012-03-21
TSINGHUA UNIV
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Problems solved by technology

[0004] The method of using polar geometric constraints needs to obtain the basic matrix in advance. The basic matrix is ​​obtained by matching point pairs to find the linear equation. Point matching is required before line matching. The accuracy of line matching is affected by the accuracy of point matching. Matching The algorithm is not efficient

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  • Line matching method and line matching system on basis of geometrical relationship
  • Line matching method and line matching system on basis of geometrical relationship
  • Line matching method and line matching system on basis of geometrical relationship

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Embodiment Construction

[0029] The invention proposes a new straight line matching method, which utilizes the geometric relationship between the straight lines in the image for matching judgment. There are parallel and intersecting relationships between straight lines in the image. The intersecting or parallel relationship between straight lines in the image obtained under different viewing angles is invariable under certain conditions. Starting from a straight line, the geometric relationship between the straight line and other straight lines can be determined. Use the straight line of the geometric relationship to judge whether it is the same straight line. After the straight line is projected onto the spherical surface, every two straight lines have two intersection points on the spherical surface. The two intersection points are the two poles of the great circle of the spherical surface. The poles are selected as the representation of the geometric relationship, and the geometric relationship betw...

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Abstract

The invention discloses a line matching method and a line matching system on the basis of a geometrical relationship. The line matching method comprises the following steps of: a step 1 of carrying out line detection on a plurality of images; a step 2 of carrying out projection transformation on lines detected from the same image; a step 3 of obtaining an intersection point of circular arcs formed by the lines detected from the same image on a projection plane; a step 4 of generating a matching feature of the lines detected from the same image; and a step 5 of carrying out line matching by the matching features corresponding to the lines detected from each image. In the method, a fundamental matrix does not need to be obtained in advanced, the influence of the point matching precision on the precision of the line matching is avoided, and the efficiency of a matching algorithm is improved.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a straight line matching method and system based on geometric relationships. Background technique [0002] Straight line is an important geometric element in constituting objects in the three-dimensional world. The linear features of objects in 2D images obtained from 3D scenes are still preserved. Part of the straight lines in the images taken at the same scene under different viewing angles remain unchanged or have a certain correlation between the straight lines, find the corresponding straight lines in different images, and use the correspondence between the straight lines to determine the matching and transformation relationship between the two images Is of great significance. The restoration of 3D scenes mainly uses points and lines to reproduce 3D objects and targets, and matching straight lines in different images is an important basis for 3D reconstruction. [0003] Th...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 陈茂银周东华侯强
Owner TSINGHUA UNIV
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