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Phase unwrapping method based on multi-view geometric consistency

A phase unwrapping, multi-view technology, applied in the field of phase unwrapping, which can solve problems such as phase wrapping

Inactive Publication Date: 2018-06-19
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, there is a phase wrapping problem in phase structured light. The measured phase is the result of taking the real phase with 2π, and the depth value and three-dimensional information of the scene can be correctly obtained only after the wrapping phase is unfolded to obtain the real phase.

Method used

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  • Phase unwrapping method based on multi-view geometric consistency
  • Phase unwrapping method based on multi-view geometric consistency
  • Phase unwrapping method based on multi-view geometric consistency

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Embodiment Construction

[0045] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] (1) if figure 1 A multi-viewpoint structured light system is constructed as shown, each structured light unit uses a projector and a camera to form a set of basic measurement units, and the projector and camera are deployed horizontally (the projector and the camera are in a left-right relationship) or vertically ( The projector and the camera are in a vertical relationship), and multiple structured light units collect the same scene from different angles, covering the range of the scene to be acquired, and the fields of view of the cameras overlap; if you need to obtain a 360° depth value, then Three or more are required, but if only the scope of the scene to be obtained is reduced, then two structured light units can also meet the requirements, and the system is calibrated (by using the existing method, such as Zhang’...

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Abstract

The invention relates to a phase unwrapping method based on multi-view geometric consistency. Firstly a multi-view structured light system is established, each view includes a set of measuring units,and calibration of the system is performed so as to acquire the projection parameter matrix of each camera; then each structured light unit uses a template to project to a measuring target, and each view measures and calculates a reference phase diagram and an acquisition phase diagram; and finally a three-dimensional mapping target energy function is established through the camera parameters andthe deformation phase under the constraint of the multi-view geometric consistency and the compensation phase of each pixel point is obtained so as to realize phase unwrapping. The correlation and theconstraint between the views are considered and the obtained phase unwrapping result is more accurate; and multiple views are synchronously unwrapped so that the workload of phase unwrapping can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of acquisition and processing of three-dimensional image information, and relates to a phase unwrapping method in a multi-viewpoint structured light system, which can be used for three-dimensional modeling, 3D printing, motion capture, natural interaction and other applications. Background technique [0002] With the development of technology, traditional two-dimensional scene representation methods (such as pictures and videos) can no longer meet the requirements for scene representation and scene recording in production and life. Correspondingly, the introduction of 3D information can solve this problem very well, and has spawned a large number of research and applications, such as 3D printing in the industrial field, product quality inspection, 3D movies in the consumer entertainment field, and so on. Among a series of technologies for collecting three-dimensional information, structured light technology has accura...

Claims

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00G06T2200/08
Inventor 向森吴谨邓慧萍朱磊赵云涛喻莉
Owner WUHAN UNIV OF SCI & TECH
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