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

A technology of structured light system and calibration board, which is applied in the field of computer vision, can solve the problems of difficult calibration of projection equipment, difficulty in accurately obtaining the corresponding relationship between three-dimensional space points and three-dimensional space points, etc., achieve small size, high reliability, and improve calibration accuracy Effect

Active Publication Date: 2021-03-12
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

Method used

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

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Embodiment Construction

[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, wherein the structured light system calibration method includes: obtaining a calibration plate image and a projection image of the calibration plate projected by a projection module, wherein the projection module The projection pattern is formed based on the binary geometric space encoding pattern; the structured light system including the camera and the projection module is calibrated by using the calibration plate image and the projection image. The invention can improve the calibration precision of the structured light system. When the camera adopts an infrared camera, the projection module adopts a projection grating module, and the structured light system is a grating structured light system, it can also provide mobile devices with a highly reliable, small-sized, and low-cost structured light system to realize high-speed mobile devices. Precision 3D scanning.

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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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