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Multi-queue rapid phase unwrapping method and multi-queue rapid phase unwrapping system based on quality diagram

A technology of phase unwrapping and quality map, applied in the field of three-dimensional measurement, can solve the problems of consuming a lot of time and slow phase unwrapping speed, and achieve the effect of increasing the speed

Active Publication Date: 2015-10-07
东莞市盟拓智能科技有限公司
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AI Technical Summary

Problems solved by technology

The traditional quality map-based phase unwrapping process uses the flood method for phase unwrapping. Each time a new point is added to the unwrapping queue, it will be sorted (that is, prioritized), and sorting will take a lot of time. Therefore, based on the traditional quality map-guided flood The phase unwrapping speed of the law is slower

Method used

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  • Multi-queue rapid phase unwrapping method and multi-queue rapid phase unwrapping system based on quality diagram
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  • Multi-queue rapid phase unwrapping method and multi-queue rapid phase unwrapping system based on quality diagram

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 1 As shown, the multi-cohort fast phase unwrapping method based on the mass map proposed by the present invention includes the following steps:

[0037] Step A: Capture the fringe pattern formed by projecting the digital fringe light onto the measured object, and calculate it to obtain the wrapping phase pattern. The digital fringe light can be a sinusoidal digital fringe light, which can be projected onto the measured object through a programmable digital 3D projector to form a fringe pattern. The fringe pattern formed is as follows: figure 2 shown. The fringe pattern can be captured by a 6-step phase shift through a telecentric lens mounted on an industrial camera. Packaged phase diagrams (such as image 3 Shown) is rep...

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Abstract

The invention relates to the field of three-dimensional measurement, and particularly relates to a multi-queue rapid phase unwrapping method and a multi-queue rapid phase unwrapping system based on a quality diagram. According to the invention, the phase unwrapping process is guided by the quality diagram, thereby effectively avoiding influences imposed on the phase unwrapping precision by noises and a low-quality region. Meanwhile, queues, whose number is equal to that of quality levels, are established so as to be used for storing nodes of each quality level, thereby avoiding a process of sequencing carried out every time when a node is added to the queues in the phase unwrapping process of a traditional flood algorithm, and greatly improving the phase unwrapping speed.

Description

technical field [0001] The invention relates to the field of three-dimensional measurement, in particular to a multi-queue fast phase unwrapping method and system based on a mass map. Background technique [0002] Structured light vision measurement is a new method for measuring the three-dimensional surface shape of objects. It has the characteristics of non-contact, convenient, fast, and high precision. It has been widely used in industrial inspection, virtual reality, cultural relics protection, and medical engineering in recent years. The phase unwrapping algorithm plays a very important role in non-contact optical profile detection. The phase obtained directly from the phase map is between -π and π, which is called the wrapped phase. It is necessary to select a suitable phase unwrapping algorithm to obtain the corresponding absolute phase. Phase unwrapping means adding 2nπ to each pixel. For an ideal wrapped phase map, the phase unwrapping process should be path-indep...

Claims

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Application Information

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IPC IPC(8): G01B11/25
Inventor 宋瑜
Owner 东莞市盟拓智能科技有限公司
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