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A Stereoscopic Acquisition Device for Obtaining Optical Properties of Objects

A technology of optical properties and acquisition equipment, applied in optics, stereo photography, instruments, etc., can solve problems such as lack of flexibility, and achieve the effect of convenient disassembly and adjustment

Inactive Publication Date: 2012-02-08
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature [6] built an acquisition device similar to this article, but the device only completes half of the entire 2V Geodesic Dome sphere, and the positions of the camera and light source are fixed, so the flexibility is insufficient

Method used

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  • A Stereoscopic Acquisition Device for Obtaining Optical Properties of Objects
  • A Stereoscopic Acquisition Device for Obtaining Optical Properties of Objects
  • A Stereoscopic Acquisition Device for Obtaining Optical Properties of Objects

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Embodiment Construction

[0027] The present invention adopts following steps:

[0028] (1) Construction based on 2V GeodesicDome sphere frame

[0029] Use the 2V Geodesic Dome polyhedron to form a nearly spherical structure. As shown in Figure 1(a). 2V Geodesic Dome has 80 faces, 42 nodes, and 120 edges. Among them, 42 nodes can be divided into 5-edge connection nodes and 6-edge connection nodes according to the number of connected edges, and 120 edges can be divided into two types: long edges and short edges, respectively, as shown in Figure 1(b). As shown, the lower hemisphere is symmetrical to the upper hemisphere. In order to form a sphere, the included angles between the long side and the short side of the tangent plane of the node are different, 18 degrees and 16 degrees respectively. figure 2For the design drawing of the long-side aluminum profile designed for the present invention, since the angle between the long side and the tangent plane where the node is located is 18 degrees, the edg...

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Abstract

Based on the 2V GeodesicDome, the present invention proposes a stereo acquisition device for acquiring the optical properties of objects. The current film and television, digital entertainment industries and other fields have put forward higher requirements for the fidelity of computer rendering, and traditional optical models cannot describe the complex optical properties of real-world objects. With the rapid development of high-precision imaging equipment such as digital cameras, researchers began to study how to restore the optical properties of real objects through real image acquisition. The present invention utilizes four-sided single-concave aluminum profiles to build a 2V Geodesic Dome, designs a liftable central platform and flexible camera or light source mounting parts, and uses anodic aluminum oxidation process to treat all parts to be black and non-reflective. Cameras and light sources can be mounted on the Dome. The full load is about 400. A synchronous control system is developed. Through a computer, the camera can be arbitrarily controlled to take pictures, the light source is turned on and off, and the high-precision electric rotary table is rotated. The device can adjust the number and position of cameras and light sources arbitrarily according to needs, and has high flexibility and stability.

Description

technical field [0001] The invention belongs to the technical fields of computer graphics and computer vision, in particular, it is an acquisition device for capturing images of objects under different lighting conditions, which is applied to image-based realistic material modeling, non-uniform participating medium modeling, geometric modeling etc. Background technique [0002] The interaction between objects and light in the real world has a wealth of optical phenomena, and the use of computers for realistic modeling and three-dimensional reproduction has a wide range of applications. However, measuring the optical properties of an object requires high-dimensional data to describe the reflection, refraction, or scattering process of light interacting with the object, which brings great difficulties to data collection, modeling, and real-time rendering. [0003] The illumination properties of an object are determined by the interaction between the light and the object, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B35/00E04B1/32G05B19/04
Inventor 赵沁平胡勇沈方阳齐越
Owner BEIHANG UNIV
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