Wavelets for computer graphics: theory and applications
Wavelets for computer graphics: theory and applications
Data Fusion for Sensory Information Processing Systems
Data Fusion for Sensory Information Processing Systems
On-line machine vision system for detect split defects in sheet-metal forming processes
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 01
Nonlinear multiresolution signal decomposition schemes. II. Morphological wavelets
IEEE Transactions on Image Processing
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This paper presents an image processing algorithm for on-line inspection of large sheet metal car parts. The automatic inspection of stamped sheet metal is not an easy task due to the high reflective nature of the material and the nearly imperceptible characteristics of the defects to be detected. In order to deal with the ubiquitous glints, four images of every zone are acquired illuminating from different directions. The image series is fused using a Haar transform into a single image where the spurious features originated by the glints are eliminated without discarding the salient information. Our results clearly suggest that the proposed fusion scheme offers a powerful way to obtain a clean image where these subtle defects can be detected reliably.