Plane calibration plate, calibration data acquisition method and calibration data acquisition system

A calibration board and plane technology, applied in the field of computer vision and camera calibration, can solve the problems of low detection accuracy of camera calibration corners, no directionality, and high requirements for calibration images, and achieve the effect of improving calibration sampling efficiency.

Pending Publication Date: 2020-01-07
BEIKE TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] A technical problem to be solved by the embodiments of the present invention is to provide a plane calibration board, a calibration data acquisition method and sys

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  • Plane calibration plate, calibration data acquisition method and calibration data acquisition system
  • Plane calibration plate, calibration data acquisition method and calibration data acquisition system
  • Plane calibration plate, calibration data acquisition method and calibration data acquisition system

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Embodiment Construction

[0072] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0073] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0074] The calibration board is used in machine vision, image measurement, photogrammetry, 3D reconstruction and other applications to correct lens distortion; determine the conversion relationship between physical size and pixel; and determine the 3D geometric position of a point on the surface of a space object and its corresponding point in the image The relationship between them needs to establish a geometric model of camera ima...

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Abstract

The embodiment of the invention discloses a plane calibration board and a calibration data acquisition method and system, and the plane calibration board comprises a plurality of separate checkerboardunits which are distributed in an array manner. A preset distance is reserved between every two checkerboard units; and at least three characteristic hollow circles which are respectively arranged inthe three different checkerboard units in the preset range of the central area of the calibration board. According to the scheme, the four edges or the four vertexes of the checkerboard unit are usedfor restraining the corner points, and the stability and precision of corner point detection are improved. And meanwhile, chessboard positioning information is added by utilizing the characteristic hollow circle, so that the plane calibration board has a directional characteristic. In addition, two-dimensional code information is added to part of the checkerboard units, so that the initial positions of the checkerboard units in the camera can be positioned. Even if a part of checkerboard units are shielded or exceed the field of view of the camera, the camera can be normally calibrated, calibration and image acquisition are more convenient and flexible, and particularly, corner sampling of a large-distortion camera is facilitated.

Description

technical field [0001] The invention relates to the technical field of computer vision and camera calibration, in particular to a plane calibration board, calibration data acquisition method and system. Background technique [0002] Camera calibration is the basic link of machine vision applications such as visual measurement and 3D reconstruction. The accuracy and precision of the calibration results directly determine whether the vision system can work normally. The camera calibration board is the basis of single-camera calibration and multi-camera calibration. It has important use value in the field of visual perception and 3D reconstruction. The quality of the camera calibration board fundamentally determines the quality of the camera calibration effect. Quality has a more important impact. Based on the known three-dimensional coordinates of the checkerboard on the calibration board and the two-dimensional coordinates of the checkerboard in the image, the internal param...

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Application Information

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IPC IPC(8): G06T7/80G06T7/70G06T7/13G06T7/60
CPCG06T7/60G06T7/13G06T7/70G06T7/80
Inventor 郑深圳刘威
Owner BEIKE TECH CO LTD
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