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Transparent object 3D surface reconstruction method and apparatus based on background schlieren technology

A technology for three-dimensional surfaces and transparent objects, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as low spatial resolution and difficult measurement of objects to be measured, and achieve high spatial resolution, convenient measurement, and simple configuration Effect

Active Publication Date: 2017-10-10
NAT UNIV OF DEFENSE TECH
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[0004] The present invention provides a method and device for three-dimensional surface reconstruction of transparent objects based on background schlieren technology to solve the

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  • Transparent object 3D surface reconstruction method and apparatus based on background schlieren technology
  • Transparent object 3D surface reconstruction method and apparatus based on background schlieren technology
  • Transparent object 3D surface reconstruction method and apparatus based on background schlieren technology

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[0063] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0064] refer to figure 1 and figure 2 , a preferred embodiment of the present invention provides a three-dimensional surface reconstruction method for transparent objects based on background schlieren technology, which is applied to a three-dimensional surface reconstruction system for a refractive index field. The three-dimensional surface reconstruction system for a refractive index field includes sequentially installed light sources 100, quasi- A straight lens 200 and a camera 300, the light source 100 is used to emit light and transmit the emitted light on the object point of the background image 400; the collimator lens 200 is used to collect the light after passing through the object po...

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Abstract

The invention discloses a transparent object 3D surface reconstruction method and apparatus based on background schlieren technology. The method includes the following steps: acquiring the angle value of the spatial bending angle which is formed by the light ray which is emitted by a light source and is further transmitted through a background image in the presence of a refractive index field and the light ray which is emitted by a light source and is further transmitted through a background image in the absence of a refractive index field; based on the acquired angle value of the spatial bending angle, obtaining a direction vector of the light ray which irradiates from the background image to a refraction point; based on the obtained direction vector which irradiates from the background image to the refraction point, determining the spatial coordinate of the refraction point and a normal vector in a tangent plane at the refraction point; based on the determined spatial coordinate of the refraction point and the normal vector in a tangent plane at the refraction point, reconstructing a 3D surface of the refractive index field. According to the invention, the method and the apparatus herein have the characteristics of simple configuration, high measured spatial resolution and low cost.

Description

technical field [0001] The present invention relates to the field of three-dimensional space construction, in particular to a method and device for reconstructing a three-dimensional surface of a transparent object based on background schlieren technology. Background technique [0002] Object 3D surface reconstruction technology can create digital models of actual objects in the virtual world. These models have a very wide range of uses, such as industrial design, flaw detection, reverse engineering, medical informatics, game creation assets, and more. There are various techniques for 3D reconstruction of objects, and each method has its own advantages and disadvantages. At present, there is no general reconstruction technique. At present, the most widely used 3D surface reconstruction equipment of objects is mainly 3D scanners, which are mainly divided into two categories, one is contact 3D scanners, and the other is non-contact 3D scanners. At present, the main idea of ​...

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 丁浩林何霖易仕和
Owner NAT UNIV OF DEFENSE TECH
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