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A three-purpose visual motion capture method without markers

A motion capture and markerless technology, applied in the field of computer vision, can solve the problem of high cost and achieve the effects of performance improvement, process simplification and cost reduction

Active Publication Date: 2021-12-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more infrared cameras are installed, the more accurate the reconstructed human motion is, and the less affected by occlusion, but the cost is higher

Method used

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  • A three-purpose visual motion capture method without markers
  • A three-purpose visual motion capture method without markers
  • A three-purpose visual motion capture method without markers

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Experimental program
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Embodiment Construction

[0037] 1. The hardware system of the present invention is composed of three cameras, the angle between the cameras is θ, the height is h, the distance between the cameras and the human body is d, and the field of view of the cameras is The human body moves within the common range of the three-camera field of view. The acquisition environment background needs to be set to a single background, such as green, and the object to be reconstructed is wearing tight clothing, and the color of the clothing is quite different from the background color, so as to facilitate the extraction of human body contours. The three cameras need to be calibrated before capturing data to obtain their respective camera internal reference matrix K 0 , K 1 , K 2 It is used to correct the subsequent 2D and 3D joint point coordinates.

[0038] 2. Contour extraction. Contour extraction is carried out using the existing image segmentation technology. Since the background color is different from that of ...

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PUM

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Abstract

The invention discloses a three-purpose point-free visual motion capture method, which belongs to the field of computer vision. Compared with the existing vicon system, the proposed method only needs 3 visual cameras to capture the video sequence, and the tester only needs to wear tight underwear without putting reflective marks on the human body; obtaining human body motion is not just the motion of joint points , but the movement of the entire human body shape. Compared with the prior art, the invention improves the performance and reliability, reduces the cost and simplifies the process. The technology of the present invention requires fewer hardware devices and cameras; the prior art usually captures actions as 3-dimensional points, but the present invention captures 3D grids, including the body shape and posture of the human body.

Description

technical field [0001] The invention belongs to the field of computer vision, in particular to a three-purpose visual motion capture method based on a three-purpose point without markers. Background technique [0002] Motion capture has a wide range of needs in the fields of film and television animation production, and is usually realized by using inertial motion sensors and visual sensors. Among them, the precision of motion capture by using an inertial motion sensor is low, and the precision of motion capture by an optical sensor is high. The optical motion capture system represented by vicon uses 4 or more high-speed infrared cameras to collect passive luminescent markers attached to the joints of the human body, and uses the method of visual measurement to construct 3D data of human joint motion, which has been obtained in the industry. mature application. In order to obtain accurate and complete information about the joints of the human body, reflective balls must be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/194G06T7/215G06T7/246G06N3/08
CPCG06N3/08G06T2207/10016G06T2207/20081G06T2207/20084G06T2207/30196G06T7/194G06T7/215G06T7/251
Inventor 郑亚莉郑旭
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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