Two-diensional three-frequency dephase measuring method base on color structural light

A measurement method and structured light technology, applied in the direction of measuring devices, photo interpretation, optical devices, etc., can solve the problem that the corresponding relationship of feature points cannot be uniquely determined, so as to avoid measurement errors, overcome low matching accuracy, and code matching Effective and Precise Effects
CN101089547AInactive Publication Date: 2007-12-19HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2007-12-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

A 2-D three-frequency diphase measuring method based on colored- structure light includes preparing three gratings by complexing different three primary color sine light with three the same frequencies, projecting said gratings on object to be measured, utilizing two the same CCD vide cameras to make shooting for obtaining 24 pieces of pictures, dephasing said pictures to obtain phase values at X and Y direction on each pixel pf each picture and matching two phase values for calculating out 3-D coordinate of each point.
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Description

technical field

[0001] The invention belongs to the field of reverse engineering measurement, and in particular relates to a two-dimensional three-frequency phase resolution measurement method based on colored structured light. Background technique

[0002] The binocular grating projection structured light measurement method is a relatively advanced measurement method at present. It combines the structured light method and the stereo vision method. The projected light beam is projected on the surface of the object through the grating to form structured light. The light is coded into fringe patterns. These deformed fringes are recorded by two CCD cameras at a certain angle to the center of the projector. Each spatial point in the measurement space is encoded according to a series of projected gratings recorded. After decoding and phase calculation, each spatial point is obtained. The encoded information and phase information of a spatial point can be used to determine its spa...

Claims

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