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Method and system for perspective deformation of plane target image

A technology of perspective deformation and plane target, which is applied in the field of image processing, can solve the problems that the image perspective deformation cannot be realized, and achieve the effect of realizing the image perspective deformation process, increasing the deformation speed, and simplifying the deformation calculation process

Inactive Publication Date: 2016-03-02
PEKING UNIV FOUNDER GRP CO LTD +1
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Problems solved by technology

Image warping technology is a branch of image processing, which mainly solves two problems: (1) the spatial position and optical feature mapping of two images before and after image warping; (2) the smoothing and optimization of the continuous image warping process
[0013] For the continuous perspective deformation process, the real image perspective deformation cannot be achieved by using the existing image deformation technology

Method used

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  • Method and system for perspective deformation of plane target image
  • Method and system for perspective deformation of plane target image
  • Method and system for perspective deformation of plane target image

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0053] Such as figure 2 As shown, a system for perspective deformation of a plane target image includes the following devices:

[0054] Image and shooting environment parameter extraction device 21: used to provide the source image taken at an angle perpendicular to the target plane (that is, the source image before deformation processing), and set the shooting environment parameters corresponding to the perspective deformation of the source image. In the embodiment, the camera environment parameter setting method is as follows: choose a point p on the source image 1 with perspective center p 0 and a point p in the imaging plane (the plane where the image is located after perspective deformation) 10 Colinear, set the perspective center of the camera device to p 1 Angle s between the straight line of the point and the plane where the source...

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Abstract

The invention relates to a perspective deformation method and system for a planar target image, belonging to the technical field of image processing. The prior art is realized based on a traditional idea of the perspective deformation, and has the disadvantages of a complex processing process, a great calculated amount, a relatively slow processing speed and a relatively high requirement on the image. The perspective deformation still cannot be realized for certain images which cannot provide regular edge information. The method and system disclosed by the invention comprise the steps of: firstly obtaining a source image before the perspective deformation; setting a camera shooting environment parameter corresponding to the perspective deformation; then determining a vertical deformation direction and a horizontal deformation direction, and calculating a vertical deformation coefficient v[i] and a horizontal deformation coefficient h[i]; and finally carrying out deformation computation for the source image so as to obtain a perspective deformation image in the camera shooting environment. According to the invention, the perspective deformation method and system for the planar target image can simplify computation process of the perspective deformation, reduce the calculated amount in the perspective deformation process, and increase the perspective deformation speed.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method and system for perspective deformation of a plane target image. Background technique [0002] Perspective warping of plane target images belongs to image warping technology. Image warping technology is a branch of image processing, which mainly solves two problems: (1) the spatial position and optical feature mapping of two images before and after image warping; (2) the smoothing and optimization of the continuous image warping process. With the development of computer graphics and computer vision technology and the strong demand for image deformation technology, this technology has made great progress, and its application fields are also expanding. [0003] The existing image deformation technology mainly includes three methods: [0004] Method 1, grid-based image deformation algorithm. First, select some feature control points in the image, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00
Inventor 曾培祥
Owner PEKING UNIV FOUNDER GRP CO LTD
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