Camera calibration method and system thereof

A camera calibration and camera technology, applied in the field of computer vision, can solve the problems of complicated operation, low calibration accuracy, poor robustness, etc., and achieve the effect of simple calibration process and high calibration accuracy

Active Publication Date: 2017-09-22
CHENGDU TOPPLUSVISION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to propose a camera calibration method and system to solve the problems...

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  • Camera calibration method and system thereof
  • Camera calibration method and system thereof
  • Camera calibration method and system thereof

Examples

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Embodiment 1

[0070] The camera calibration system based on multi-board single image in this embodiment is as follows: figure 1 As shown, it includes a camera 1 and a calibration module; the calibration module is a multi-board single-image calibration module; it includes 4 calibration boards 2 whose planes are not all on the same plane;

[0071] The camera 1 includes an image acquisition module, an image split module, a feature point extraction module, a feature point restoration module, and a camera calibration module;

[0072] The image acquisition module is used to photograph the multi-board single-image marking module, and obtain the image of the multi-board single-image marking module;

[0073] The image splitting module is used to divide the image of the multi-board single-image marking module into blocks;

[0074] The feature point extraction module is used to perform feature point detection on each block of the multi-board single image labeling module image splitting;

[0075] The...

Embodiment 2

[0115] The camera calibration system provided in this embodiment is a hybrid calibration system based on multi-board single-image and single-board single-image, which includes a camera and a calibration module. The difference from Embodiment 1 is that this calibration module is implemented On the basis of the multi-board single-image calibration module described in Example 1, a single-board single-image calibration module is added, and the single-board single-image module only includes one calibration board;

[0116] The camera includes an image acquisition module, an image split module, a feature point extraction module, a feature point restoration module, and a camera calibration module;

[0117] The image acquisition module is used to photograph a multi-board single-image identification module to obtain images of the multi-board single-image identification module; and to photograph a single-board single-image identification module to obtain a single-board single-image identi...

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Abstract

The invention relates to a computer vision technology and discloses a camera calibration method. In a traditional technology, of the camera calibration method, operation is complex, calibration precision is low and robustness is poor. By using the method of the invention, the above problems are solved. The method comprises the following steps of a, installing a calibration module group formed by a plurality of calibration plates; b, shooting the calibration module group and acquiring a calibration module group image; c, partitioning the calibration module group image; d, carrying out characteristic point detection on each image block; e, restoring a characteristic point coordinate to an original calibration module group image coordinate; and f, optimizing a camera parameter. In addition, the invention also discloses a corresponding camera calibration system which is suitable for camera calibration.

Description

technical field [0001] The invention relates to computer vision technology, in particular to a camera calibration method and system. Background technique [0002] Camera calibration is a key link in applications such as photogrammetry and machine vision. Image quality is one of the important factors that determine the precision and accuracy of post-processing data and final results. Due to the limitation of lens manufacturing process, raw material quality and other factors, distortion will inevitably occur, which will lead to problems such as loss of precision and image deformation in post-processing. [0003] The main function of camera calibration is to calculate and estimate the internal parameters and distortion parameters of the camera, so that the image can be estimated and restored according to these parameters in the later image processing process, and a good quality image can be obtained. So far, many methods have been proposed for the camera calibration problem. I...

Claims

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Application Information

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IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 唐荣富罗林周剑
Owner CHENGDU TOPPLUSVISION TECH CO LTD
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