A dynamic acquisition method of high-definition images based on spectral analysis
A spectrum analysis, high-definition image technology, used in image communication, optical devices, components of color TV, etc., can solve the problems of unclear features, missing features, poor quality of feature images, etc., to achieve no strong light interference, meet the Extraction, clear features
Active Publication Date: 2017-08-22
DALIAN UNIV OF TECH
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[0003] The technical problem to be solved by the present invention is to solve the problems of poor quality, unclear features, and missing features in the process of binocular stereo vision scanning and measurement of the surface of large composite material components. Analysis of high-definition image dynamic acquisition method
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[0040] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.
[0041] The present invention aims at the problem that the feature information is easily submerged by strong light reflection during the online laser scanning measurement process on the surface of a large composite material component, and defines the corresponding light bar image as a high-quality image on the condition that the image processing can accurately extract the light bar feature information; The gray value of the laser light stripe in the collected image cannot exceed 255, that is, the light stripe cannot be overexposed, otherwise the gray distribution of the light stripe area will lose the Gaussian characteristic, which will affect the extraction of the characteristic information of the light stripe; on the other hand, the gray value cannot If the value is too small, otherwise the light strip features will...
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The invention relates to a high-definition image dynamic acquisition method based on spectral analysis, which belongs to the technical field of computer vision measurement, and relates to a high-reflection separation method based on spectrum selection and a high-definition image dynamic acquisition method based on camera exposure parameter time control. This method firstly establishes the light strip image quality evaluation criteria, and obtains the image average gray threshold range that meets the requirements of light strip feature information extraction; conducts spectral analysis on multi-light source information, and separates high-brightness environments based on the spectral difference between feature light and ambient light. Light; By adjusting the exposure time of the camera in real time and controlling the amount of light collected by the camera, the brightness is basically consistent during the overall line laser scanning measurement process, and high-quality sequence images that meet the extraction of light strip feature information are obtained. This method can effectively obtain high-quality light stripe feature images in the process of three-dimensional shape measurement, and the obtained light stripe sequence images have good quality, clear features, and no strong light interference, which can meet the extraction of high-precision image features.
Description
technical field [0001] The invention belongs to the technical field of computer vision measurement, and relates to a high-reflection separation method based on spectrum selection and a high-definition image dynamic acquisition method based on time control of camera exposure parameters. Background technique [0002] The manufacturing and development of large aircraft is crucial to the development of national economy and national defense security. Among them, the manufacturing and assembly accuracy of its large components is an important guarantee for the quality and performance of large aircraft. Carbon fiber composite materials have the characteristics of light weight and high strength. Facing the requirements of light weight and high performance of modern large aircraft, carbon fiber composite materials are the first choice for the manufacture of new modern large aircraft. However, there are still many problems in the manufacture and processing of composite materials, and ...
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IPC IPC(8): G01B11/25H04N5/235H04N17/00
Inventor 刘巍高鹏杨帆张洋李晓东贾振元高航
Owner DALIAN UNIV OF TECH