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Three dimension object contour phase measuring method based on double frequency color strip projection

A technology of three-dimensional objects and colored stripes, which is applied in the field of optical inspection and robot vision, to achieve the effect of improving the measurement speed

Inactive Publication Date: 2008-08-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, only one frame of image needs to be collected during the measurement process, which overcomes the disadvantage of requiring at least three frames of images in the traditional phase shifting method, not only ensures the accuracy of the unwrapping process, but also greatly improves the measurement speed

Method used

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  • Three dimension object contour phase measuring method based on double frequency color strip projection
  • Three dimension object contour phase measuring method based on double frequency color strip projection
  • Three dimension object contour phase measuring method based on double frequency color strip projection

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Embodiment Construction

[0014] A three-dimensional object profile phase measurement method based on dual-frequency color fringe projection, which can quickly realize the three-dimensional shape measurement of the measured object. In the process of obtaining two sets of three-dimensional measurement data with high and low measurement accuracy, only need A projected fringe image improves the measurement speed, and the method can be used for fast three-dimensional measurement and three-dimensional shape measurement and deformation measurement of dynamic objects. The detailed description is as follows:

[0015] (1) Measuring principle

[0016] The basic principle of the measurement system is as figure 1 shown. At least a video camera and a stripe projector G are included. In the figure, p is the exit pupil of the projection system, I is the entrance pupil of the camera, S and d are the structural parameters of the measurement system respectively, and the measured object is placed on the reference plan...

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Abstract

One frame of sine stripe projection in dual frequency and two-color is adopted in the method. Using Fourier transform obtains information of height of object to be measured in high and low two accuracies in measurement. Carrying out process of removing enwrapping obtains removed enwrapping value of phases of 3D body outline. Under condition of ensuring accuracy of removing enwrapping, the measuring procedure only needs to collect one frame of image so as to raise measuring speed greatly.

Description

technical field [0001] The invention belongs to the field of optical detection and robot vision, and relates to an optical detection method, in particular to a method for measuring the contour phase of a three-dimensional object based on dual-frequency color fringe projection, which can quickly realize the three-dimensional shape measurement of the measured object, As well as object deformation measurement and detection, it is a non-contact optical detection method. Background technique [0002] Object three-dimensional shape measurement and object deformation detection are widely used in industrial production, military and medical fields. With the development of processing industry and the continuous improvement of product quality standards, products such as machinery, electronics, clothing production, animation production In the production process, it is necessary to detect the shape of its products or objects to obtain three-dimensional digital information. There are man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/25G01B11/16
Inventor 赵宏施展张璐
Owner XI AN JIAOTONG UNIV
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