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

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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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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