Rotary raster scanning image-acquiring technology

A raster scanning and rotary technology, applied in optics, stereo photography, instruments, etc., can solve the problems of portrait side distortion, easy failure, complex design and installation, etc., and achieve the effect of reducing data distortion

Inactive Publication Date: 2010-09-08
徐晋
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  • Abstract
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Problems solved by technology

[0006] In addition, since the rotary 3D scanning image capture device needs to rotate more than 360°, the design and installation of various power cables and video cables are very complicated and prone to failure
[0007] The grating 3D acquisition technology uses a projected grating made of p

Method used

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  • Rotary raster scanning image-acquiring technology
  • Rotary raster scanning image-acquiring technology

Examples

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Embodiment Construction

[0016] Such as Figure 1 As shown, 10 linear laser generators (3) and 10 video cameras (4) are installed on a 180° arc-shaped rotary platform (2) with the portrait (1) as the center of the circle. These 20 pieces of equipment are equidistantly distributed on the rotary platform in the form of an angle of 9°. The laser generator (3) and the video camera (4) rotate on the rotary platform (2) with the portrait (1) as the axis, and the rotation angle is about 18°. The laser emitted by the linear laser generator (3) constitutes a vertical equidistant grating; the camera (4) collects the reflected light of the linear laser emitted by the laser generator (3) on the portrait; finally, the image collected by the camera is processed by a computer, The processing finally obtains the 3D data of the portrait.

[0017] Considering that the back of the human head has no expression features, it is only necessary to collect three-dimensional data from about 120° to 180° in front of the head. ...

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Abstract

The invention relates to the rotary raster scanning image-acquiring technology, and relates to the three-dimensional (3D) acquisition of spatial coordinates of an image. The principle of the raster three-dimensional acquisition technology is utilized, and a vertical equidistant raster is formed by adopting lasers emitted by N equidistant linear laser generators; the principle of the rotary 3D scanning image-acquiring technology is utilized, the N linear laser generators and M equidistant cameras are arranged equidistantly by taking the image as the center of a cycle, and the laser generators or/and the cameras rotate by taking the image as the center of a cycle; the lasers emitted by the linear laser generators are projected onto the image, the cameras acquire laser-reflected light on the image, and the three-dimensional data of the image is finally obtained through the processing of a computer. The movement time of the laser generators or/and the cameras is shortened to about 1/N or 1/M of the rotary movement time of the conventional rotary 3D scanning image-acquiring instrument, and the effects of reducing the distortion factor of the data and acquiring the facial expression of people in real time can be achieved.

Description

technical field [0001] The invention relates to a technology for collecting three-dimensional data (3D) of a non-contact portrait space coordinate. Background technique [0002] The spatial coordinate 3D acquisition technology has been applied and researched in various industries and achieved fruitful results. It is widely used in high-tech fields such as mold manufacturing in industrial products, product inspection, measurement, design, geodetic mapping, and even aerospace. At present, the three-dimensional data acquisition methods can be divided into three types according to the principle: contact type, such as three-dimensional coordinate measurement; non-contact type, such as structured light method, laser triangulation method; scanning method. In the 1980s, the American company Cyberware developed a dedicated 3D head scanner, which was successfully used in film and television special effects production. At present, there are two main technologies used in the 3D acqui...

Claims

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Application Information

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IPC IPC(8): G03B35/08
Inventor 徐晋李建利
Owner 徐晋
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