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A lens radial distortion correction method

A radial distortion and correction method technology, applied in the field of image processing, can solve problems such as image data deviation, inconformity with human visual habits, processing errors, etc., and achieve good correction effects, excellent real-time performance, and simple correction methods

Active Publication Date: 2022-02-18
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

However, since the images acquired by such short focal length lenses will produce obvious radial distortion, which does not conform to the visual habits of the human eye, and, in image processing, radial distortion will also cause deviations in image data, so that relying on image information to carry out Subsequent processing produces serious errors, therefore, it is necessary to properly correct the distorted image

Method used

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Embodiment Construction

[0047] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0048] In the embodiment of the present invention, the lens radial distortion correction method, the method flow chart is as follows figure 1 shown, including the following steps:

[0049] Step 1. Perform edge detection on the distorted image, perform binarization processing to obtain a binary image, and then obtain the edge contour of the distorted image through filtering and corner point extraction;

[0050] In the embodiment of the present invention, such as figure 2 The binary image of the distorted image shown; edge detection is performed on the distorted image, and the binary image is obtained using the canny operator, and then the edge profile of the distorted image is obtained by filtering and corner point extraction; in the embodiment of the present invention, as image 3 The edge profile image of the distorted image shown;

[0051] Step 2. ...

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Abstract

The invention proposes a lens radial distortion correction method, which belongs to the technical field of image processing. The invention can correct the obvious radial distortion of a short focal length lens. The correction method is simple, the correction effect is good, and it has strong robustness , the J-Linkage algorithm is adopted in the present invention to carry out automatic clustering using the Jaccard distance, without the need to specify the number of model instances in advance, and without any parameter debugging; in the present invention, according to the difference between the number of similar arcs and the distortion model, Three methods are proposed to calculate the distortion center and distortion coefficient; the reverse model correction algorithm used in the present invention will not cause holes in the corrected image, successfully avoid extra operations such as interpolation, and at the same time obtain better correction effect and better real-time.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a lens radial distortion correction method. Background technique [0002] Wide-angle lenses, fisheye lenses and other short focal length lenses are widely used in security monitoring, driving records and other fields due to their large viewing angle and wide field of view. However, since the images acquired by such short focal length lenses will produce obvious radial distortion, which does not conform to the visual habits of the human eye, and, in image processing, radial distortion will also cause deviations in image data, so that relying on image information to carry out Subsequent processing produces serious errors, therefore, it is necessary to properly correct the distorted image. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention proposes a lens radial distortion correction method to achieve the pur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/006
Inventor 栾辉孙厚广潘鹏飞徐冬林钟惟林张云洲肖冬
Owner ANSTEEL GRP MINING CO LTD
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