The inspection of shiny or reflective surfaces can be very difficult using conventional machine vision illumination techniques. A new video on STEMMER IMAGING’s You Tube channel demonstrates the advantages of the Trevista Surface system which reliably detects texture and topology defects in difficult surfaces.
The Trevista surface inspection system combines structured diffuse illumination with specialised calculation algorithms within the popular Sherlock machine vision platform to create a fast automated total inspection solution capable of identifying defects in a range of surfaces from shiny components to diffusely scattering surfaces. The process filters the image information produced to separate topography and texture into different images. Topographic images allow defects down to a depth of just a few micrometres to be located and classified quickly, reliably and free of interference, while texture images allow differences in brightness on the inspected component to be determined.
The video illustrates the shortcomings of using a variety of conventional lighting techniques and how the Trevista system can be used to show both texture and topography. The Trevista system can be used with area scan cameras for the inspection of flat surfaces and line scan cameras for the inspection of cylindrical surfaces. The robust design allows reliable integration into the manufacturing process or into an automatic tester. The Trevista algorithms can also be implemented through STEMMER IMAGING’s own Common Vision Blox imaging toolkit.
STEMMER IMAGING Ltd
The Old Barn, Grange Court
Tongham, Surrey, GU10 1DW, UK.
Phone: +44 1252 780000 Fax: +44 1252 780001
info@stemmer-imaging.co.uk
