We present a framework for automatic inspection of welding seams based on specular reflections. To this end, we make use of a feature set – called specularity features (SPECs) – that describes statistical properties of specular reflections. For the classification we use a one-class support-vector approach. We show that the SPECs significantly outperform other approaches since they capture more ...

Polynomial Texture Maps (PTM) [1] form an alternative method for apprehending surface colour and albedo that extends a simple model of image formation from the Lambertian variant of Photometric Stereo (PST) to more general reflectances. Here we consider solving such a model in a robust version, not to date attempted for PTM. But the main upshot of utilizing robust regression is in the identific...

A method of combining optical skin images obtained at different illumination angles is proposed to reduce the effect of specular reflection in normal white light clinical skin images in order to avoid optical interference with the analysis of skin line pattern. A weighted average image with weights determined by independent component analysis of the images shows a demonstrable reduction in the ...