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General acquisition method for weak-contrast collimation image target center of comprehensive diagnosis system

A technology of comprehensive diagnosis and acquisition method, which is applied in the field of general acquisition and comprehensive diagnosis system of contrast collimated image target center, which can solve the problem of high complexity of optical target center, achieve the effect of separation, simple method, and improve calculation accuracy

Pending Publication Date: 2020-10-30
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the problem of high complexity in calculating the center of the optical target, the present invention integrates the pinhole image and the schlieren ball image in order to solve the problem that different optical target center calculation methods need to be proposed for different optical target images in the traditional optical path automatic collimation process. and other optical target images, a general acquisition method for the target center of weak-contrast collimated images in comprehensive diagnostic systems is proposed

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  • General acquisition method for weak-contrast collimation image target center of comprehensive diagnosis system
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  • General acquisition method for weak-contrast collimation image target center of comprehensive diagnosis system

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[0063] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] The design idea of ​​the present invention is to divide the 6 types of different optical target images into 3 types of images in the optical path collimation process, and use a unified algorithm to process the images to obtain the center of the optical target. These three types of images are pinhole images, Schlieren ball images and images other than the above two.

[0065] In this embodiment, the rapid automatic alignment process of the optical path of the comprehensive diagnostic system is taken as an example. The process is divided into six stages, which are self-inspection preparation, collimation pinhole calculation, coaxial deviation correction, triple frequency reference docking, Schlieren reference docking and perforation reference docking; a total of 6 acquisition images are required to find the iterative...

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Abstract

The invention discloses a general acquisition method for a weak contrast collimation image target center of a comprehensive diagnosis system, which adopts a unified method to acquire optical target centers of different types of images, and is simpler and more practical compared with the existing method. The method mainly comprises the following steps: 1, constructing an original image into a multi-dimensional image cube; 2, performing dimension reduction processing on the multi-dimensional image cube to obtain a first-dimensional image after dimension reduction; 3, performing K-means classification on the first-dimensional image after dimension reduction to obtain a binary image; 4, judging whether the binarized image is a schlieren small ball image or not, and if so, obtaining a schlierensmall ball target separation image; if the image is a pinhole image, feature points on the circular contour of the pinhole image needing to be obtained; if the image is another image, directly acquiring a target center of the image by using a gravity center method; and 5, carrying out circle fitting on the pinhole image and the schlieren small ball image by using a least square method to calculate the circle center of the images so as to obtain the center of the optical target.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for universally acquiring the target center of a weak-contrast collimated image in a comprehensive diagnosis system. Background technique [0002] The comprehensive diagnostic system is a multi-functional, high-accuracy laser parameter diagnostic platform, including optical sampling, detection, monitoring, control and other measurement components, used to precisely diagnose the characteristics of the output laser beam of high-power solid-state laser devices, and to study frequency conversion components and related scientific and technical issues to provide comprehensive and accurate laser parameters. The system is located at the end of a high-power solid-state laser device and is primarily designed for measuring high dynamic range far-field focal spots using the schlieren method. [0003] According to the principle of schlieren measurement, it is ne...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/2135G06F18/23213G06F18/24137
Inventor 王拯洲王力谭萌段亚轩李刚魏际同弋东驰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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