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Video camera rating data collecting method and its rating plate

A technology of camera calibration and calibration data, which is applied in the field of calibration boards, can solve problems such as poor accuracy of self-calibration algorithms, and achieve the effects of strong versatility, simple production, and simple operation process

Inactive Publication Date: 2008-04-23
南通鑫唐纺织印染有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the self-calibration algorithm is less accurate than the traditional calibration algorithm, it is not suitable for occasions such as 3D reconstruction that require very high detection accuracy.

Method used

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  • Video camera rating data collecting method and its rating plate
  • Video camera rating data collecting method and its rating plate
  • Video camera rating data collecting method and its rating plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for collecting camera calibration data for collecting calibration data in a camera calibration process:

[0035] The first step: first set the mark dots distributed in an array on the calibration board, and select five mark dots as the feature mark dots, expand the above five feature mark dots, so that the above five feature mark dots If the diameter is larger than the remaining mark dots except the above five characteristic mark dots, one of the above five mark dots as characteristic mark dots shall be used as a reference feature mark dot, and the reference feature mark The dot has the distance from the reference characteristic mark dot to other characteristic mark dots greater than the distance between any two characteristic mark dots and the connection line between the reference characteristic mark dot and other characteristic mark dots The included angle between them is greater than 3 degrees, two of the four characteristic mark dots other than the above-me...

Embodiment 2

[0040]A calibration board used for the acquisition method of camera calibration data, which includes a calibration board plate 1, on which a mark dot 2 is arranged on the calibration plate plate 1, and the mark dots 2 are distributed in an array on the calibration plate plate 1. Among the mark circles 2, 5 mark circles are characteristic mark circles, whose diameter is larger than the other mark circles 2, and one of the 5 characteristic mark circles is a reference feature mark circle, and the reference feature mark circle The distance between the point and other characteristic mark circles is greater than the distance between any two characteristic mark circles, and the angle between the lines connecting the reference feature mark circle and other mark circles is greater than 3 degrees. Among them, the calibration board plate 1 is a blackboard, and the mark dot 2 is a white solid circle.

[0041] The following is a more detailed description of the specific embodiments of the ...

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Abstract

Present invention discloses camera rating data gathering method and calibration plate. First, setting sign dot according to array distributing on calibration plate, then posting calibration into video camera field of view to shoot and taking calibration plate image , finally using sign dot center of circle as rating data source to proceed coarse positioning to sign dot center of circle to obtain rating data. said calibration plate includes plate having sign dot according to array distributing, in sign dot, five sign dots used as characteristic indication characteristic indication dot whose diameter is greater than rest sign dots, in five sign dots, one is used as reference characteristic indication dot. Said invention is simple, easy to operate, and strong versatility.

Description

technical field [0001] The invention relates to a method for acquiring camera calibration data and a calibration board used therefor, in particular to a method for collecting camera calibration data and the calibration board. Background technique [0002] One of the basic tasks of computer vision is to calculate the three-dimensional information of the object in the field of view from the image captured by the camera, so as to reconstruct and recognize the three-dimensional object. The relationship between the three-dimensional geometric information of the surface point of the object and its corresponding point on the image is determined by the imaging model of the camera. The process of establishing this geometric model is actually the process of solving the camera parameters. Therefore, the calibration of camera parameters is the premise and key of this modeling process. The process of solving the camera parameters is called camera calibration. [0003] The document "Ima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225H04N5/247H04N23/90
Inventor 达飞鹏尤伟
Owner 南通鑫唐纺织印染有限公司
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