INDEPENDENT COMPONENT ANALYSIS FOR NONDESTRUCTIVE EVALUATION OF STRUCTURES USING SPECKLE INTERFEROMETRY

Speckle interferometry - an electronic version of holographic interferometry - displays a shape of structural mode for the nondestructive evaluation of structure integrity. As shown, low-frequency preprocessing and histogram equalization enhance contrast and compensate equipment distortions, which are in the images displaying structural mode shapes. The Independent Component Analysis of mode shape image as a whole gives an opportunity to extract its local features. Artifacts and edge blurring are compensated by high-frequency edge filters. Morphological processing is then performed to extract the crack shape from the independent components of mode shape image.

• Kukharenko B.G.
• Zolotov V.A.

• Прикладные науки. Медицина. Технология

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