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A Method of Establishing Linear Model of Image Distortion

A linear model and image distortion technology, applied in the research field of image distortion linear model establishment method, can solve the problem of reducing the calibration accuracy of lens distortion

Active Publication Date: 2018-02-16
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Or the internal parameters, external parameters and distortion parameters are calibrated together, but due to the coupling between parameters, the calibration accuracy of lens distortion may be reduced

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  • A Method of Establishing Linear Model of Image Distortion
  • A Method of Establishing Linear Model of Image Distortion

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar meanings throughout. The embodiments described below are exemplary, and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The invention aims at the problem that it is difficult to simultaneously calibrate internal parameters and distortion coefficients during the camera self-calibration process, and proposes a method for establishing a linear model of image distortion.

[0031] In order to have a clearer understanding of the present invention, a brief description is given here. The invention includes two basic steps: Step 1, establishment of camera imaging model; Step 2, solution of camera distortion parameters.

[0032] specific, figure 1 Shown is a flowchart of an image sensor network optimal deplo...

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Abstract

The invention proposes a method for establishing a linear model of image distortion, which includes two basic steps of establishing a camera imaging model and solving camera distortion parameters. Step 1, first establish the camera imaging linear model, further consider the lens distortion, and establish the camera nonlinear model; Step 2, first establish the image distortion nonlinear model, and solve the relationship between the image points before and after the distortion through formula derivation, and then pass The Taylor formula is expanded and linearized to obtain a linear model of image distortion. The invention establishes a linear model of image distortion, which can flexibly and effectively solve the problem of simultaneously solving internal parameters and distortion coefficients of the camera during the self-calibration process of the camera.

Description

technical field [0001] The invention relates to the fields of computer vision and camera calibration, in particular to the research on a method for establishing a linear model of image distortion. Background technique [0002] Camera calibration is an essential step to obtain spatial three-dimensional information from two-dimensional images, and the quality of the calibration results directly affects the results of quantitative analysis of digital images. Therefore, camera calibration is the most critical step in digital image processing. The camera imaging model is divided into linear model and nonlinear model. The linear model is the widely used pinhole imaging model. The nonlinear model refers to the addition of nonlinear distortion items on the basis of the linear model. When the depth of field of the camera is large or When the quality of the camera is not too high, the distortion item needs to be considered. [0003] The estimation process of the camera distortion pa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
Inventor 孙茜王小艺许继平王立张慧妍于家斌苏婷立
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY