Free view angle relighting method and system based on photometric stereo

A photometric stereo and heavy lighting technology, which is used in stereo photography, optics, 3D image processing, etc., and can solve problems such as the difficulty of heavy lighting in dynamic scenes.
CN101872491AInactive Publication Date: 2010-10-27TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2010-10-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a free view angle relighting method based on photometric stereo, which comprises the steps of: acquiring a multi-view angle dynamic video image of a target object by using a multi-view angle photographic array; acquiring a three-dimensional model of the target object and a surface reflection characteristic of the model according to the acquired multi-view angle dynamic video image; acquiring a static three-dimensional object relighting model and a three-dimensional motion trail of the target object; acquiring dynamic three-dimensional object relighting models of the target object in every moment according to the three-dimensional motion trail of the target object and the static three-dimensional object relighting model; and rendering the dynamic three-dimensional object relighting model of the target object on the basis of the free view angle given by a user so as to realize the free view angle relighting of the target object, wherein the rendering to the dynamic three-dimensional object relighting model depends on a free view angle given arbitrarily by a user. The dynamic scene relighting method provided by the invention is high-efficiency and supports the observation with free view angles.
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Description

technical field

[0001] The present invention relates to the field of digital image processing, in particular to a method combining photometric stereo, using a multi-view camera array to collect dynamic video under controllable lighting conditions, restoring the normal direction and reflection characteristics of a target object, and re-illuminating from a free view angle and system. Background technique

[0002] With the rapid development of digital acquisition and processing technology, dynamic video has become a widely existing media format in daily life and scientific research. In the process of video processing and playback, lighting conditions have a crucial impact on video quality and effects. In addition, different shooting angles will also bring different effects. Especially for dynamic objects of interest, in order to observe the object from a free perspective and generate different effects of the object under arbitrary lighting conditions, it is necessary to perfor...

Claims

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