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Multi-checkerboard corner detection method and camera calibration method

A camera calibration and corner detection technology, used in image analysis, image data processing, instruments, etc.

Inactive Publication Date: 2018-07-06
X CHIP MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problem in the prior art that cameras need to be calibrated by shooting multiple images from multiple angles, and aims to provide a new camera calibration method, which only needs to take an image containing a multi-angle calibration plate. Can

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  • Multi-checkerboard corner detection method and camera calibration method
  • Multi-checkerboard corner detection method and camera calibration method
  • Multi-checkerboard corner detection method and camera calibration method

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Embodiment Construction

[0069] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0070] Such as figure 1 What is shown is a schematic flowchart of a camera calibration method in an embodiment of the present invention. refer to figure 1 , the camera calibration method includes the following steps:

[0071] Including the following steps:

[0072] Step S10, obtain an image containing multi-angle checkerboard:

[0073] According to the requirements, build a multi-checkerboard calibration environment, and place multiple checkerboard calibration boards on the fixture according to a certain pose relationship. Each calibration plate is placed at a different angle, and there is no obstruction between each other, and the calibration plate fills the entire field of view as much as possible.

[0074] Select a shooting pos...

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Abstract

The invention discloses a multi-checkerboard corner detection method and a camera calibration method. The multi-checkerboard corner detection method comprises the following steps: an image containingcheckerboards at multiple different angles is acquired; the acquired image is subjected to corner detection to determine candidate corners; and the candidate corners are screened according to a cornergrowth algorithm, checkerboard corners are determined, each checkerboard array is recognized and segmented, and multiple checkerboard corner sequences are obtained. According to the technical scheme,the calibration procedure is thus greatly simplified, the calibration cost is reduced, and the calibration time is saved.

Description

technical field [0001] The invention relates to the technical field of camera calibration, in particular to a checkerboard corner detection method and a camera calibration method. Background technique [0002] Vision is the most important way for human beings to obtain information. As an automated solution to replace human eye imaging, machine vision has played an increasingly important role in many neighborhoods, such as robot navigation, vehicle assisted driving systems, automatic assembly, etc., cameras It is an imaging device for machine vision. Multiple 2D images can be used to quantitatively model the field of view in 3D, but the premise is that the physical and geometric characteristics of the camera need to be known, and the camera characteristic parameters can be obtained through camera calibration. [0003] On the one hand, low-cost acquisition of images of calibration objects directly determines the cost of producing and calibrating camera modules, which in turn d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80G06T7/11G06T7/13
CPCG06T7/11G06T7/13G06T7/80
Inventor 童飞周宇唐艾宾徐洪波张可骄余志强沈雨剪贺遥
Owner X CHIP MICROELECTRONICS TECH CO LTD
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