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New 3D measurement tools from Stemmer Imaging are designed to enhance the accuracy of 3D measurements in industrial vision applications.

CVB Metric 3D and CVB Merge 3D enable the accurate calibration of 3D images and overcome potential problems in laser triangulation image acquisition resulting from shadows in the laser line, according to the company.

These new tools have been added to the 3D suite of tools in the latest version (10.2) of the Common Vision Blox (CVB) programming library, which fully supports all 32-bit versions of Microsoft Windows 7.

Although many 3D applications can work reliably with non-calibrated images, calibration is essential for some applications.

CVB Metric 3D enables a 3D space to be calibrated by measuring a defined calibration object.

Once calibrated, data-point area or volume can be directly measured to sub-pixel accuracy.

To improve accuracy, the calibration can be made using the combined resultant image from CVB Merge 3D.

CVB Merge 3D is used in combination with multiple cameras to overcome any systematic deficiency in laser line triangulation and to make sure all flaws and defects will be detected during the inspection.

Deficiencies in laser line triangulation arise when the surface structure of the object causes shadows in the laser line.

This prevents the extraction of local height information at these positions, meaning that flaws at these positions cannot be detected.

Acquiring images from the same laser line using multiple cameras set at different angles produces images with shadows at different positions.

CVB Merge 3D consolidates these different images into a single-height image having a complete surface that will only lack height information if all the input images contain shadows at exactly the same place.

STEMMER IMAGING is Europe’s largest imaging technology provider with headquarters in Germany and subsidiaries in the United Kingdom, France and Switzerland.

Image processing or Machine Vision is used in many different application areas – such as industrial automation, medical imaging, security and traffic technology – as a powerful and cost effective way of implementing automatic quality assurance. Even at high speeds and with stringent accuracy requirements, image processing allows 100% monitoring and thus strengthens the competitive edge of those companies using it.

STEMMER IMAGING customers have access to a wide variety of imaging products from the worlds leading manufacturers. These manufacturers represent the cutting edge of vision technology which is something that is unique in Europe. STEMMER IMAGING are the developers of the world’s leading image processing software platform, Common Vision Blox, and as a manufacturer of customer-specific products, we have a full range of in-house expertise to draw on, allowing us to supply the best possible service to our customers when choosing an imaging solution. STEMMER IMAGING does not produce turn-key solutions – instead, using our close partnerships with a large number of experienced system integrators, we can provide expert technical know-how for the planning, integration and realisation of complete solutions.

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