Calibration method of pick up camera or photographic camera geographic distortion

A geometric distortion and camera technology, which is applied in image enhancement, image data processing, instruments, etc., can solve problems such as calibration and distortion physical sources are not clear, camera or camera geometric distortion is not easy, etc., to achieve the effect of improving quality

Inactive Publication Date: 2006-01-11
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies in the prior art, and propose a new calibration method for camera or camera geometric distortion, to solve the problem that the camera or camera geometric distortion is not easy to calibrate and the physical source of distortion is not clear

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  • Calibration method of pick up camera or photographic camera geographic distortion
  • Calibration method of pick up camera or photographic camera geographic distortion
  • Calibration method of pick up camera or photographic camera geographic distortion

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Embodiment Construction

[0019] In order to better understand the technical solutions of the present invention, a further detailed description will be given below in conjunction with the accompanying drawings and embodiments.

[0020] The imaging process that adopts the method of the present invention to calibrate is as follows: figure 1 As shown, the specific steps are as follows:

[0021] 1. Establish the transformation relationship between the ideal imaging plane coordinate system and the actual imaging plane coordinate system: take the image coordinate system in the general pinhole camera model as the ideal imaging plane coordinate system oxyz, and first rotate the ideal imaging plane coordinate system around the x-axis Rotate an angle θ, and then rotate an angle ψ around the y-axis to obtain the actual imaging plane coordinate system OUVW. A rotation matrix R determined by the above-mentioned rotation angles θ and ψ around the x-axis and y-axis can be used c Indicates the transformation relation...

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Abstract

The present invention relates to a calibration method of geometric distortion of pickup camera or photographic camera. Said method includes the following main steps: firstly, creating coordinate conversion relationship between ideal imaging plane and actual imaging plane and between actual imaging plane and pixel coordinate system, collecting calibration image, extracting image point on straight line, making coordinate conversion and adopting other measures, and utilizing optimization principle to obtain the geometric distortion parameter of pickup camera or photographic camera. Said method can be used for geometric calibration of pickup camera or photographic camera, standardization of pickup camera and their assembled quality inspection.

Description

technical field [0001] The invention relates to a method for calibrating geometric distortion of a video camera or a camera, which can be applied to geometric calibration of images taken by a video camera or a camera, camera calibration in computer stereo vision, and quality inspection of video camera or camera lens processing and assembly. It belongs to the field of advanced manufacturing and automation. Background technique [0002] Due to various errors of the camera or camera during component processing and assembly, the captured image has geometric distortion. This geometric distortion not only affects the visual effect of the image, but also affects the camera calibration accuracy in computer stereo vision. Therefore, the calibration of video camera or camera geometric distortion is an important issue in image processing, computer stereo vision, and video camera or camera manufacturing and inspection. [0003] At present, there are two categories of methods for camer...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 王建华石繁槐张婧刘允才
Owner SHANGHAI JIAO TONG UNIV
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