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The CVB Flex Inspect inspection tool for flat materials such as prints, watermarks and textiles is now available from Stemmer Imaging. It is said to overcome the traditional limitations of comparing the sample under test with a ‘golden template’ of a single-known good part. In allowing for natural product variations in the test samples, greater flexibility for industrial print and packaging pattern inspection is achieved.

Many products are not manufactured, reproduced or printed with the necessary fidelity to be tested against a ‘golden template’ for quality assurance purposes. CVB Flex Inspect uses machine learning research to build a complex appearance model of good examples on the fly during training.

The appearance model captures the permitted variations in the training set while in ‘learn’ mode. Then, when in ‘verify’ mode, CVB Flex Inspect is able to compare the test images with this flexible internal model of allowable appearances to give a quality metric and/or difference image.

This means that the vision developer does not have to spend a long time writing specific inspection code to cope with all the variations that are allowable in a template.

CVB Flex Inspect is available as a CVB Premium tool and requires either CVB Image Manager or CVB Foundation for use. A Teledyne Dalsa Sherlock plug-in is also available for the tool to allow its use without programming capability.

Further benefits

  • CVB Flex Inspect learns what is expected while training and also offers the ability to visualise the acceptable distortion of the product using the ‘imagination’ mode.
  • By visualising a range of possible images, the operator has confidence in what the system has learnt and what it will accept.
  • If the system sees something that it has not seen before, the tool will let the operator know and the operator can choose to allow the variation (add it to the model) or reject the part.
  • CVB Flex Inspect includes a deformable template alignment tool to allow easy alignment of the test image to the template model; this simplifies use by dealing with gross changes in the position and scale of the objects without the need to manually select alignment markers.
  • For applications where automatic alignment is insufficient, CVB Flex Inspect can accept pre-aligned images, providing design flexibility for the developer.

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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