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Camera self-calibration method and system based on approximate plane target

A technology for a camera and a flat target, which is applied in the field of camera self-calibration method and system based on an approximate flat target, can solve the problems of inability to self-calibrate the camera and the surface shape is not flat, and achieves that the calibration method is simple and feasible, and the production cost is low and convenient. obtained effect

Active Publication Date: 2020-04-03
李安澜
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are already many methods for camera self-calibration of 3D non-control points. There is no effective method for camera self-calibration of 2D non-control points.
[0004]The radio telescope with a 100-meter aperture has a surface shape close to a plane in a small local area, but its surface shape is not a plane, so the plane constraint cannot be used for the camera’s self- calibration

Method used

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  • Camera self-calibration method and system based on approximate plane target
  • Camera self-calibration method and system based on approximate plane target
  • Camera self-calibration method and system based on approximate plane target

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] Embodiments of the present invention provide a camera self-calibration method based on an approximate planar target, such as figure 1 As shown, it mainly includes the following steps:

[0023] Step 1. Point the camera to be calibrated directly at the approximately flat target, obtain the two-dimensional image measurement coordinates of each feature point on the target, and generate the corresponding three-dimensional space coordinates.

[0...

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Abstract

The invention discloses a camera self-calibration method and system based on an approximate plane target, and the related scheme employs a non-control point in an approximate plane scene for the calibration of a camera, does not need to know the coordinates of the control point, i.e., does not need to manufacture an accurate target, can reduce the cost, and is higher in precision.

Description

technical field [0001] The invention relates to the technical field of camera self-calibration, in particular to a camera self-calibration method and system based on an approximate planar target. Background technique [0002] In camera calibration, if 3D control points are used for calibration, the 3D coordinates of the control points need to be known; if planar control targets are used for calibration, the 2D coordinates of points on the planar target need to be known. These two methods need to make accurate three-dimensional solid targets, or accurate two-dimensional planar targets, and the cost is relatively high. [0003] The surface shape of a large radio telescope with a 100-meter diameter needs to be inspected on-site. The photogrammetry method is a simple and convenient method. To ensure the accuracy of photogrammetry, it is necessary to calibrate the camera on-site. If three-dimensional or two-dimensional control points Calibration is relatively difficult. Camera ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80
CPCG06T7/80G06T2207/30208
Inventor 李安澜
Owner 李安澜