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Multi-phase image arbitrary reflector velocity interferometer data processing method

A data processing, multi-phase technology, applied in image data processing, image analysis, instruments, etc., can solve problems such as loss of information, reduce spatial resolution, affect data processing accuracy, etc., to achieve the effect of improving data processing accuracy

Pending Publication Date: 2022-03-01
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0004] Therefore, the key to image arbitrary reflector velocity interferometer data processing is to accurately solve the variation of fringes, or usually convert to solve the phase change of image arbitrary reflector velocity interferometer fringes; currently the most commonly used image arbitrary reflector velocity interferometer data The processing method is to use Fourier transform to transform, filter and calculate the phase of the image; but this method is not a point-by-point processing, but a homogenization processing in the spatial direction, and part of the information will be lost during the filtering process, resulting in Reduce the spatial resolution, which ultimately affects the accuracy of data processing

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[0053] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0054] The invention provides a kind of data processing method of multi-phase image arbitrary reflection surface velocity interferometer, wherein, specifically be divided into following steps and carry out:

[0055] S1. Processing a single original image to obtain several multi-phase images;

[0056] refer to figure 1 As shown, the fringe image recorded by any reflective surface velocity interferometer is expressed by the following formula:

[0057] I n (x,y)=A(x,y)+B(x,y)cos[φ(x,y)+δ n ] (1)

[0058] In formula (1), (x, y) represents any position on the image; A(x, y) represents the background intensity, and A(x, y) is related to the environmental noise and the uneven reflection of the surface to be measured; B (x, y) represents the light intensity modulation distribution of the probe light; B(x, y) / A(x, y) obtains the contrast of the fringe, and φ(x, y...

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Abstract

The invention provides a multi-phase image arbitrary reflector velocity interferometer data processing method, which is characterized by comprising the following steps: S1, processing a single original image to obtain a plurality of multi-phase images; s2, performing phase solving by using the multi-phase image; s3, phase unwrapping is carried out, and the shock wave velocity is obtained through calculation; wherein the step S2 is carried out according to the following steps: S21, calculating to obtain the phase distribution of the original image; s22, solving a phase error so as to solve a phase; s23, judging whether the phase distribution is correct or not by utilizing a probability density function; by adopting the method, through curve comparison before and after probability density function processing, the uniformity of phase distribution is obviously improved by using the method; compared with a traditional data processing method, a point-to-point phase calculation method is adopted, spatial resolution of data processing is effectively improved, influences of phase errors are compensated in the processing process, and therefore data processing errors are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of laser measurement, in particular to a data processing method of a multi-phase image arbitrary reflection surface velocity interferometer. Background technique [0002] The image arbitrary reflector velocity interferometer mainly uses the optical Doppler effect and optical mixing technology to track the frequency conversion process through optical mixing technology to obtain the shock wave velocity change process; in inertial confinement fusion, the image arbitrary reflector velocity interferometer is used as An important diagnostic equipment, widely used in tests such as shock wave speed regulation, state equation, etc., can be used to diagnose shock wave velocity and shock wave front, so it is very important for data processing of image arbitrary reflector velocity interferometer. [0003] In the fringe image recorded by an arbitrary reflective surface velocity interferometer, the fringe change amount is...

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Application Information

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IPC IPC(8): G06T7/00G06T7/41G06F17/15G06F17/18
CPCG06T7/97G06T7/41G06F17/15G06F17/18
Inventor 关赞洋理玉龙刘永刚王峰刘耀远彭晓世刘祥明徐涛蒋小华
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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