Surface defect detection and evaluation method e.g. for automobile bodywork paint finish, uses light reflection from examined surface

摘要

The defect detection and evaluation method uses a collimated light beam for illumination of the examined surface, with detection of the reflected light via a position-dependent image processor. The image information provided by the latter is used for formation of a mask defining the bright and dark areas of the image, with subsequent illumination of the surface via diffuse light, with only the radiation from the unmasked regions used for determining the illumination characteristics and analysis of the obtained image.