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Real-time single-frame phase extraction method

A phase extraction, real-time technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problem of poor extraction accuracy

Active Publication Date: 2020-05-22
XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a real-time single-frame phase extraction method to solve the problem of poor phase extraction accuracy of the existing single-frame phase extraction method for low-frequency stripes and abruptly curved surfaces

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  • Real-time single-frame phase extraction method

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Embodiment Construction

[0070] The present invention will be further described below in conjunction with embodiment.

[0071] In order to solve the problem that the existing single-frame phase extraction method has poor phase extraction accuracy for low-frequency fringes and abrupt curved surfaces, the present invention provides a real-time single-frame phase extraction method. The method of the invention utilizes the confrontation generation network to realize the high-precision extraction of the phase of the single-frame fringe image.

[0072] In order to illustrate the inventive method in more detail, this method provides following embodiment:

[0073] 1) Step 1, determine the number of neural network simulations, build a deep convolutional confrontation generation network, and determine the loss function for training

[0074] In fringe projection profilometry, an object is a fringe on a surface with a height h. After being captured by a camera, the Fourier series form of the deformed fringe map ...

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Abstract

The invention belongs to the field of artificial intelligence of optical measurement, and particularly relates to a real-time single-frame phase extraction method. The method specifically comprises the steps of: 1) establishing a deep convolutional generative adversarial network, and determining a trained loss function; 2) establishing a fringe projection measurement system; 3) collecting a training data set; 4) calculating a phase truth value of a collected deformation fringe pattern; 5) training the network with the loss function and data set in the above-mentioned steps; and 6) conducting real-time single-frame phase extraction. The method provided by the invention mainly utilizes the generative adversarial network, adopts the deformation fringe pattern as the input, generates a corresponding phase diagram, and solves the problem that the existing single-frame phase extraction method is poor in phase extraction precision for low-frequency fringes and abrupt-change curved surfaces.

Description

technical field [0001] The invention belongs to the field of optical measurement and artificial intelligence, and in particular relates to a real-time single-frame phase extraction method. Background technique [0002] Phase extraction has very important applications in optical measurement, such as interferometry, moiré measurement, fringe projection structured light measurement, etc. The widely used phase extraction method is the phase shift method. The advantage is that the phase extraction accuracy is high; the disadvantage is that multiple frames of images are required, so dynamic objects cannot be measured. Single-frame phase extraction technology only needs one frame of deformed fringe image to calculate the phase, so it is usually used for real-time measurement. [0003] Among fringe projection profilometry, the most widely used single-frame phase extraction technique is Fourier transform profilometry. The advantage of Fourier transform profilometry is fast calculat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/2518G01B11/254
Inventor 李欢欢彭磊马力郭迪王丛华李康
Owner XIAN CHISHINE OPTOELECTRONICS TECH CO LTD
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