Laser spot center position and contour acquisition method
A center position, laser spot technology, applied in the field of vision measurement, can solve the problems of shape distortion, spot divergence, scattering, etc., to improve the range of use, improve positioning accuracy, and solve the effect of spot divergence
Active Publication Date: 2019-12-03
JIANGSU UNIV
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Problems solved by technology
When the beam propagates through a certain distance, the spot will produce divergence, scattering, and shape distortion. If the shape fitting is used, it will cause recognition errors
The current spot recognition method cannot effectively identify irregular spots, and is only suitable for occasions where energy concentration and spot outlines are regular.
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[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0037] Such as figure 1 As shown, it is a preferred embodiment of the laser spot center position and the contour acquisition method of the present invention, and the laser spot center position and the contour acquisition method comprise the following steps:
[0038] Spot image acquisition: the laser spot grayscale image is collected by the image acquisition device; preferably, the grayscale image with 8 bits is collected by the CCD. The images collected by the CCD are sent to the computer, and the computer performs the following...
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The invention provides a laser spot center position and contour acquisition method. The method comprises the following steps: spot image acquisition: acquiring a laser spot grayscale image through animage acquisition device; light spot image filtering preprocessing: performing noise filtering preprocessing on the light spot grayscale image to eliminate noise at the edge of the light spot grayscale image; and light spot image reaction diffusion processing: performing reaction diffusion processing on the preprocessed light spot grayscale image through the converted FHN model to obtain the central position and contour of the laser light spot grayscale image. Based on a laser beam reaction diffusion principle and combining a laser energy distribution theory, diffusion light spots formed afterlaser beam propagation are denoised, corrected and shrunk through the reaction diffusion system, so that the light spot center positioning precision is improved, the center positions of fuzzy and divergent light spots are recognized more accurately, and the problems that the light spot center positions are difficult to recognize and large in error due to divergence and distortion of the light spots when laser is propagated in the atmosphere are solved.
Description
technical field [0001] The invention belongs to the field of visual measurement and relates to a method for acquiring the central position and outline of a laser spot. Background technique [0002] In some precision optical measurement systems, machine vision is often used to identify the position of the laser spot to complete the physical quantity measurement. The accuracy of laser spot recognition is directly related to the accuracy of the measurement system. As the beam propagates in the atmosphere, the shape of the spot may be irregular due to atmospheric instability and scattering phenomena, so the traditional edge fitting method may cause errors in spot shape and position recognition. Therefore, improving the spot recognition method and accurately locating the irregular spot is the basic problem to improve the precision of the optical measurement system. [0003] The traditional spot center position recognition method is based on image segmentation and edge fitting m...
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IPC IPC(8): G06T5/00G06T7/13G06T7/60G06T7/70
CPCG06T7/13G06T7/60G06T7/70G06T5/70
Inventor 宗圣康韩俊龙张西良李伯全尹经天何仁宇吴越
Owner JIANGSU UNIV