Patent ID: 11875500
Assignee: WUHAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The failure diagnosis method as claimed in claim 1, wherein fusing the gray-scale images in Step 3 comprises:
decomposing and reconstructing the images by choosing three wavelet decomposition layers by using a Mallat's fast wavelet transformation algorithm, wherein the images are decomposed into low-frequency components and high-frequency components in three directions comprising a vertical direction, a horizontal direction, and a diagonal direction, the low-frequency components are fused through weighted averaging, so as to uniform a region having a gray-scale value difference is greater than a threshold, reduce an obvious difference in the image, and suppress a feature loss phenomenon in image fusion; and processing the high-frequency components through the region-based property measurement, wherein energies E in a region of the images are compared, a matching degree M is calculated, a matching threshold T is set, and a suitable weight and variable are chosen, as factors for image fusion, through weighting and operator selection, to facilitate edge details.