Checkerboard corner automatic extraction method, system and device and medium

An automatic extraction, checkerboard technology, applied in image data processing, instruments, calculations, etc., can solve problems such as inability to label, error, etc., to achieve the effect of quick calibration

Pending Publication Date: 2021-03-05
SHENZHEN GUANGJIAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the checkerboard image fills the entire camera field of view, errors often occur when identifying corner points at this time, so that it is impossible to label each grid area in the checkerboard image

Method used

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  • Checkerboard corner automatic extraction method, system and device and medium
  • Checkerboard corner automatic extraction method, system and device and medium
  • Checkerboard corner automatic extraction method, system and device and medium

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Embodiment Construction

[0063] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0064] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein, for example, can be practiced in sequences other than those illustrated or described h...

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PUM

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Abstract

The invention provides a checkerboard corner automatic extraction method, system and device, and a medium, and the method comprises the steps of obtaining a checkerboard image which comprises at leastone marking pattern, and the marking pattern is located in a grid region of the checkerboard image; identifying a marked graph area in the checkerboard image, and further extracting position information of a marked graph in the checkerboard image; determining the positions of each black grid region and each white grid region according to the position information of the mark pattern; and determining the position of each checkerboard corner point in the checkerboard image according to the position information of each black checkerboard area and each white checkerboard area. According to the invention, the mark graph is arranged on the checkerboard image, and the positions of each black grid region and each white grid region are sequentially determined by extracting the mark graph, so that the extraction of the position of each checkerboard corner point is realized, the problem that when the checkerboard image is full of the whole camera field of view, the recognition of the corner points is often wrong is avoided, and thus realizing implementation of fast calibration of camera.

Description

technical field [0001] The present invention relates to camera calibration, in particular to a method, system, device and medium for automatically extracting checkerboard corner points. Background technique [0002] In the image measurement process and machine vision applications, in order to determine the relationship between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image, it is necessary to establish a geometric model of camera imaging, and these geometric model parameters are camera parameters. Under most conditions, these parameters must be obtained through experiments and calculations. This process of solving parameters is called camera calibration. [0003] When the camera is calibrated, a calibration plate is usually used for calibration. The geometric model of the camera can be obtained by shooting the flat plate with a fixed-pitch pattern array by the camera and calculating the calibrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/13G06T7/73G06T7/80
CPCG06T2207/10004G06T7/13G06T7/73G06T7/80
Inventor 黄龙祥魏逸豪曾皓洁朱力吕方璐汪博
Owner SHENZHEN GUANGJIAN TECH CO LTD
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