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Structured light system calibration method and device, structured light system and mobile device

A technology of a structured light system and a calibration board, applied in the field of computer vision, can solve the problems of difficulty in calibrating projection equipment, difficult to accurately obtain the corresponding relationship between three-dimensional space points and three-dimensional space points, etc., and achieves small size, high reliability, and high coding density. Effect

Active Publication Date: 2018-06-29
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

At present, the camera calibration technology is mature, and it can be calibrated by using a checkerboard calibration board. However, the projection device is a non-imaging device, and it is difficult to accurately obtain the corresponding relationship between the three-dimensional space point and the corresponding position of the three-dimensional space point on the projection image, resulting in Calibration of projection equipment is relatively difficult

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  • Structured light system calibration method and device, structured light system and mobile device
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0031] The inventors found that in the calibration process of the structured light system, the calibration of the projection equipment is relatively difficult, because the projection equipment is a non-imaging equipment, it is difficult to accurately obtain the corresponding relationship between the three-dimensional space point and the corresponding position of the three-dimensional space point on the projection image, although Some existing schemes calibrate structured light systems by projecting squares, dots or stripes, but these schemes cannot achieve high-precisi...

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Abstract

The invention discloses a structured light system calibration method and device, a structured light system and a mobile device. The structured light system calibration method includes acquiring a calibration board image and a projection images of a calibration board after being projected by a projection module, wherein the projection pattern of the projection module is formed based on a binary geometric space coding pattern; performing calibration on a structured light system including a camera and the projection module by utilizing the calibration board image and the projection image. The invention can improve the calibration precision of the structured light system. The camera is an infrared camera, the projection module is a projection grating module and the structured light system is agrating structured light system. The structured light system which is high in reliability, small in size and low in cost can be provided for the mobile device, so that high-precision three-dimensional scanning of the mobile device is realized.

Description

technical field [0001] The invention relates to the technical field of computer vision, in particular to a structured light system calibration method and device, a structured light system and a mobile device. Background technique [0002] Structured light 3D scanning technology has been widely used in product design and manufacturing, industrial measurement, quality inspection, medicine, film and television entertainment and other industries due to its advantages of low cost, non-contact, high precision, and high efficiency, and is known as the most promising three-dimensional measurement method. The structured light 3D scanning technology achieves 3D scanning by actively controlling the light source, which has higher reliability than other 3D scanning technologies. Before carrying out 3D reconstruction with structured light, the structured light system must be calibrated first, that is, the internal parameters of the camera and projection equipment in the structured light ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/2531
Inventor 唐苏明宋展刘晶曾海宋丽芳
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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