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Shape from shading is an inclination and curvature measuring 3D technique used in automated quality control. Mainly applied in inline surface inspection and particularly on flat surfaces, it ensures reliable detection of surface irregularities such as cracks, scratches, pores or notches.
In one method, the object under inspection is illuminated from four different directions, one after the other. Each direction is captured by gray scale imaging. The inclination and curvature information provided by the surface shading is used in image evaluation to identify the surface quality. This method ensures reliable detection of tiny irregularities in the structure geometry even on highly-reflective or glossy surfaces.
Safe and precise detection of even slight irregularities in structure and shape with the help of high-resolution cameras
Cost-efficient and easy surface inspection on virtually any material – even on highly-reflective metal objects
Camera-integrated lighting control
Baumer supports you in your shape from shading application with industrial cameras featuring four individually triggered power outputs, with pulse width modulation and an output power of up to 120 W (max. 48 V / 2.5 A). Both illumination and level of brightness are sequentially triggered by the camera and followed by image acquisition and transmission to a PC for evaluation. This eliminates the need for a separate illumination controller, simplifies system design and cuts down on cost and labor for cabling, programming and documentation.
An integrated fast sequence controller and internal image memory – for image capturing in Burst Mode – minimize the required inspection time at high process speeds.
Easy and cost-efficient system design thanks to integrated illumination and brightness control
Integrated, GenICam compatible sequencer for controlling illumination and triggering image acquisition directly from the camera
No external illumination controller requirement saves cost and time by reducing cabling and programming effort
Reliable detection of even the slightest surface irregularities with up to 12 megapixel resolution