Abstract: The invention relates to a method and a measuring arrangement. The method comprises radiating optical radiation at a first moment in time to a surface area of the surface of the object from a radiation direction, the radiation being part of optical radiation comprising different intensities at different points of its intensity profile. The surface area is imaged to generate image information by performing the imaging from an imaging direction that deviates from said radiation direction by a known direction difference. Said radiation and imaging is performed at least at two other moments in time. An intensity value ratio is generated from intensity values comprised by the imaging information generated from the radiated surface area, the ratio determining the point on the intensity profile. The height of the surface area is determined for determining the shapes of the surface of the object.

Abstract: The invention relates to a method for automatic inspection of the surface 20 of a moving object, in which a region on the object's surface is illuminated from at least two different illumination directions 13-15. The object's illuminated surface region is imaged with a camera to provide image information for analysis. The light sources in the different illumination directions 13-15 are pulsed to illuminate the object's surface region at different times, the pulsing frequency being >1 kHz The object's illuminated surface region is imaged as lines with a line scan camera 21 in sync with the above pulsing.