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A Method for Position Estimation of Multiple Light Sources

A technology of multiple light sources and light sources, used in optics, optical components, instruments, etc.

Active Publication Date: 2020-01-03
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to accurately locate the position of multiple light sources in a complex environment, the present invention proposes a method for estimating the position of multiple light sources. Problems such as the seamless fusion of the fusion scene, so that the superimposition of virtual objects on the real scene is more immersive and more realistic

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  • A Method for Position Estimation of Multiple Light Sources
  • A Method for Position Estimation of Multiple Light Sources
  • A Method for Position Estimation of Multiple Light Sources

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Embodiment Construction

[0068] Below in conjunction with accompanying drawing, the present invention will be further described: as figure 1 As shown, a multi-light source position method includes a computer 1, a camera 2, a first specular reflection ball 3, a second specular reflection ball 4, a test bench 5, and a light source group 6; wherein the computer 1 and the camera 2 are connected by cables , the first specular reflection ball 3 and the second specular reflection ball 4 are placed on the test bench 5, the radius of the first specular reflection ball 3 is represented by Sr1, the radius of the second specular reflection ball 4 is represented by Sr2, the light source Group 6 is composed of G light sources, which are respectively referred to as the i-th light source, i=1, 2,..., G; it is characterized in that the specific steps are as follows:

[0069] Step 1. Note that the world coordinate system coincides with the camera 2 coordinate system. Utilize the computer 1 to control the camera 2 to a...

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Abstract

The invention relates to a multi-light source position estimation method. The method is characterized by comprising following steps that a world coordinate system and the coordinate system of a cameracoincide; the computer converts srcimage into a gray scale image by use of a rgb2gray function in Matlab2015; by use of a formula, constructing an equation group; according to an orthogonal diagonalization decomposition principle, setting a threshold value; through a manual operation mode, constructing an equation group; and constructing a matrix P for representing the coordinate of the ith lightsource in the word coordinate system. In this way, estimation of positions of multiple light sources is achieved. According to the invention, a seamless fusion problem in a virtual fusion scene basedon multiple light sources in the augmented reality can be solved, so a virtual object can be superposed in a real scene in a quite immersive and vivid manner.

Description

technical field [0001] The invention relates to a method for estimating positions of multiple light sources, and belongs to the technical field of augmented reality. Background technique [0002] Augmented reality technology is the seamless rendering of virtual objects in the real environment, and it has been successfully applied in many fields such as education, medicine, and entertainment. Illumination consistency is one of the key technologies in augmented reality, which refers to the consistent lighting of real and virtual objects. Once the light source parameters are obtained, the light and shade of virtual objects and shadows can be manipulated in the virtual-real fusion scene. The position estimation of multiple light sources is the focus and difficulty of complex environment illumination consistency. [0003] Lighting detection algorithms in augmented reality can be divided into two types of light source restoration algorithms: image-based lighting (IBL) and invers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/01
Inventor 李华韩成张超权巍蒋振刚薛耀红胡汉平徐超
Owner CHANGCHUN UNIV OF SCI & TECH