Compression and reconstruction method for thermal wave image sequence

Abstract

The invention relates to a compression and reconstruction method for efficiently fixing viewing field pulse thermal wave image sequence and belongs to the field of equipment thermal wave imaging nondestructive detection techniques. Aiming to solve the colossal data processing quantity problem of the infrared thermal wave image sequence, the method comprises the following steps: a thermal wave pixel point data sequence heat conduction law and a sequence partition method are adopted to classify the data sequences so as to generate a corresponding representative sequence and a category table; according to a one-dimension thermal wave temperature attenuation model and a multinomial data fitting method, a fitting coefficient table of all category sequences is obtained; thermal image acquisition parameters, and the data of both the fitting coefficient table and the category table are adopted as the compression characteristic of the thermal wave image sequence, so as to form a thermal wave image compression document for storage; and the fitting coefficients are adopted to rebuild the thermal wave image sequence according to the category table. According to the invention, the category number can be flexibly set according to practical detection requirements; the ratio of compression can reach more than ten thousand times, and the calculation quantity is reduced by thousand times; and the requirement on computer hardware is remarkably reduced. The method is flexible in use, is particularly suitable for large-viewing field thermal image processing, and has an extensive application prospect.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a thermal wave non-destructive detection image processing method, in particular to a high-efficiency compression and reconstruction method for a pulsed thermal wave image sequence with a fixed field of view. Background technique [0002] Infrared thermal wave (Thermal Wave) non-destructive testing technology is a new type of non-destructive testing technology emerging in the field of aerospace and defense in the United States in the 1990s. Since 1990, foreign countries have actively carried out research on thermal wave theory and technology. With the continuous improvement of the computer level and the accuracy of infrared thermal imaging cameras, this technology has been widely used in aerospace, petrochemical, construction, electric power, medicine and other fields. increasingly widespread applications. The theoretical basis of thermal wave detection technology is the t...

AI Technical Summary

Problems solved by technology

[0004] To sum up, so far, a simple and easy method has not been found that can realize the compression and reconstruction of infrared thermal wave non-destructive testing images to meet the rapid detection and identification of defects.

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