A two-degree-of-freedom adjustment mechanism for human body 3D scanning

Abstract

The present invention relates to a two-degree-of-freedom adjustment mechanism for human body three-dimensional scanning. The two-degree-of-freedom adjustment mechanism includes a front frame, a rear frame, cross beams, an outer ring frame, an inner ring frame, a supporting bracket and linear motion units; the front frame, the rear frame and the cross beams constitute the body of the adjustment mechanism; the inner ring frame is installed in the front frame through a one-stage rotation shaft; the inner ring frame is installed in the outer ring frame through a two-stage rotation shaft; the supporting bracket and the inner ring frame are connected with each other and are fixed together; and a scanning camera is installed on the supporting bracket. The one-stage linear motion unit drives the outer ring frame to rotate around the one-stage rotation shaft through a guide rod mechanism, and the two-stage linear motion unit drives the inner ring frame to rotate around the two-stage rotation shaft, and therefore, the scanning camera can have rotational degrees of freedom in a horizontal direction and a vertical direction in a three-dimensional space. In the human body three-dimensional scanning, a plurality of groups of adjustment mechanisms are arranged to form a circular arc structure, and a human body is located in the center of the circular arc structure, and the angles of the scanning cameras in the horizontal direction and vertical direction are adjusted, so that the camera lenses of the scanning cameras can face the human body, and therefore, images for 3D model splicing can be obtained.

Description

technical field [0001] The invention relates to an adjustment mechanism, in particular to a two-degree-of-freedom adjustment mechanism for 3D scanning of a human body. Background technique [0002] At present, the commonly used method for 3D scanning of the human body is the non-contact measurement method. The non-contact measurement method is subdivided into passive and active methods. The passive method does not require a specific light source and relies entirely on the natural light conditions of the object for scanning. Binocular technology is often used, but the accuracy is low, and only objects with geometric features can be scanned. A 3D scanner is equivalent to a scanning camera. By creating a point cloud of the geometric surface of the object, the point cloud is interpolated into the surface shape of the object. If the scanner can obtain the surface color, it can be further pasted on the reconstructed surface. The scanning range of a 3D scanner is limited. Therefor...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the existing problems of high number of scans, unfixed scanning positions, and low precision, a two-degree-of-freedom adjustment mechanism for 3D human body scanning is proposed. The scanning camera is placed on the adjustment mechanism 200, and a certain number of adjustment mechanisms 200 Arranged in an arc, the human body 201 is located at the center of the arc, such as figure 1 As shown, the distance between the adjustment mechanism 200 and the human body 201 is fixed; by adjusting the scanning cameras, all the scanning cameras point to the human body 201, and the 3D model of the human body can be obtained by taking two shots

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