A multi-objective optimization infrared thermal image defect feature extraction method based on homogeneous evolution
A multi-objective optimization and feature extraction technology, used in image enhancement, image analysis, image data processing, etc., can solve the problem of similarity between temperature points that have not been studied and similar temperature points, inaccuracy, incomplete information representation, etc. question
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[0146] In this embodiment, there are two kinds of defects on the test piece, namely defect 1 not filled with any material and defect 2 filled with material with poor thermal conductivity.
[0147] In this embodiment, the results of classifying the selected transient thermal responses using fuzzy C-means clustering are shown in figure 2 shown.
[0148] Three known temperature points are directly extracted from the thermal image sequence of the specimen, namely, the transient thermal response curves of the temperature point of the material itself, the temperature point of defect 1, and the temperature point of defect 2, respectively denoted as Bac POINT, Def1 POINT and Def2 POINT, such as image 3 , 4 , 5 shown.
[0149] Using the existing method of selecting transient thermal response representatives based on differences, three transient thermal response representatives are obtained: A NFCM 12 , B NFCM 3 as well as c NFCM 50 , they respectively correspond to the tem...
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