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Projector calibration method based on Gold matrix projection

A calibration method and technology of projectors, which are applied in the directions of instruments, image analysis, image enhancement, etc., can solve problems affecting calibration accuracy, etc., and achieve the effect of simple calibration, simplified difficulty, and reduced errors

Active Publication Date: 2020-02-14
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the excessive projection patterns faced by the current projector calibration and the mutual interference between the projection patterns and the calibration plate pattern, the calibration accuracy is affected.

Method used

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  • Projector calibration method based on Gold matrix projection
  • Projector calibration method based on Gold matrix projection
  • Projector calibration method based on Gold matrix projection

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the embodiments and accompanying drawings. But it should not limit the protection scope of the present invention.

[0041] Since both the calibration plate and the projection pattern in this embodiment are circular arrays, in order to distinguish, the circles on the calibration plate are called big circles, and the circles projecting the Gold matrix are called small circles.

[0042] In this embodiment, the camera is a color area array camera with a model number of FL3-U3-20E4CUSB3.0 interface of Pointgrey Company, with a resolution of 1600×1200 pixel and a pixel size of 4.5um×4.5um. The projector adopts the model of LCD projector produced by EPSON Company, and the resolution is 1920×1080pixel. The structure of the equipment used in the fast three-dimensional measurement method for large-size optical blanks in the present invention is as follows: figure 1 shown.

[0043] The calibration method...

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Abstract

The invention discloses a projector calibration method based on Gold matrix projection. The projector calibration method mainly utilizes a Gold matrix coding structured light technology to calibrate aprojector. By projecting the specially designed Gold matrix structured light, the projector calibration method overcomes the defects of low calibration speed, poor stability and low precision of theprojector at the present stage, and has the characteristics of simplicity, quickness and high precision in calibration of the projector.

Description

technical field [0001] The invention relates to the field of optical three-dimensional measurement, in particular to a calibration method for calibrating a projector based on a Gold matrix projection scheme. Background technique [0002] The calibration of the projector is the focus and difficulty of monocular 3D measurement, and the calibration accuracy of the system is related to the accuracy of the later 3D reconstruction. [0003] Since the projector cannot image an object like a camera, the calibration method of the projector at this stage mainly treats it as an "inverse camera" for processing. Camera calibration methods are many and mature, while projector calibration methods are relatively few and need to be improved. [0004] The calibration of the projector needs to know the two-dimensional coordinates of the feature points on the projection object plane and the corresponding three-dimensional coordinates of the feature points on the plane of the calibration plate....

Claims

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Application Information

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IPC IPC(8): G06T7/80
CPCG06T7/80G06T2207/10024
Inventor 周常河李超缪超峰余俊杰
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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