Rotary raster scanning image-acquiring technology

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...

AI Technical Summary

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 points and surfaces. This technical principle will cause distortion on the side of the portrait

However, the rotary 3D scanning image acquisition technology is complicated in design and installation, especially when the image acquisition takes a long time, resulting in stiff facial expressions

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