Light source estimation method and device based on multiple spheres and intelligent electronic device

A ball and light source technology, applied in the field of virtual reality, can solve problems such as blurred light source lines, complex algorithms, and harsh experimental conditions, and achieve the effect of simplifying complexity

Inactive Publication Date: 2017-06-13
GEER TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The existing 3D multi-light source estimation method needs to divide the objects in the scene into planes and curved surfaces, and the algorithm is relatively complicated.
There is also a method of using the Lambertian sphere to estimate the light source, but first of all, it is necessary to divide the area of ​​action illuminated by different light sources. The light source lines are usually very blurred, difficult to find accurately, and the experimental conditions are harsh.

Method used

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  • Light source estimation method and device based on multiple spheres and intelligent electronic device
  • Light source estimation method and device based on multiple spheres and intelligent electronic device
  • Light source estimation method and device based on multiple spheres and intelligent electronic device

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Embodiment Construction

[0042] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0044] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0045] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a light source estimation method and device based on multiple spheres and an electronic device. The light source estimation method comprises the steps that light spots on the surfaces of specular reflection spheres are detected from images, and coordinates of central points of the light spots in image planes are obtained; according to the coordinates of the central points of the light spots in the image planes and parameters of a vidicon, back projection is conducted on the central points of the light spots to obtain a ray; according to the raw direction and the normal directions of the central points of the light spots, the direction of a self-luminous light source is calculated; brightness detection is conducted on the Lambert spheres in the images to obtain the brightness of spherical points of visible parts of the Lambert spheres; a lighting equation is established for the spherical points of the visible parts of the Lambert spheres respectively, the lighting equations form an overdetermined equation set, and the intensity of ambient light and the intensity of the self-luminous light source are solved. The light source estimation method is a new method.

Description

technical field [0001] The present invention relates to virtual reality technology, and more specifically, to a method for estimating light sources based on multiple spheres, a device for estimating light sources based on multiple spheres, and electronic equipment. Background technique [0002] One of the basic tasks of computer vision is to start from the image information acquired by the camera, calculate the geometric information of the object in the three-dimensional space, and reconstruct and recognize the object. The relationship between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image is determined by the geometric model of the camera imaging, and these geometric model parameters are camera parameters. The camera calibration method is to place an object of known shape and size in front of the camera, which is called a calibration object, process the image of the calibration object captured by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/42G06T7/00
CPCG01J1/42G01J2001/4247G06T2207/10004
Inventor 仇璐张绍谦张超
Owner GEER TECH CO LTD
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