Hyperspectral imaging is conquering the industry

Hyperspectral imaging is conquering the industry
Hyperspectral-based imaging is establishing itself in ever new industrial fields of application. How does this technology work and where can it be used?
Hyperspectral imaging reliably recognizes knotholes, spots with resin and high moisture in wood.
Hyperspectral imaging reliably recognizes knotholes, spots with resin and high moisture in wood.Bild: Perception Park GmbH

HSI in wood processing

In recent decades, woodworking technologies have made extraordinary strides. There are also many options in this field of application to check the quality of products such as sawn timber, wood-based materials, wood chips and paper and paper products with HSI systems. Even features that are invisible to humans and possible defects can be reliably detected. The detection of defects such as resin pockets or knotholes is a common task in this industry, which can be reliably solved with the help of a hyperspectral system in combination with a near-infrared hyperspectral camera. Resin in wood can be identified reliably even if it is covered by a thin layer of wood. Even adhesives that are often used in the production process to compensate for small holes with fillers can be easily recognized by using chemical color imaging – a task that conventional image processing cameras often fail because the adhesive is usually transparent. Another important characteristic of wood is its moisture. With HSI analyzes, damp spots in the wood can be clearly identified and displayed as a CCI image. It is even possible to calibrate a perception system to measure the fraction of water. By adapting a hyperspectral camera to such a calibrated perception system, Chemical Color Imaging transforms the camera system into an easy-to-understand “moisture camera” for wood and can be implemented into any image processing system. “For high-quality wood products, the reliable detection of such defects is an imperative,” emphasizes Burgstaller. “HSI systems offer a powerful tool for this industry to avoid undesirable quality defects in time.”

HSI systems for plastics sorting

Even at the end of their lifespan, plastics are still too valuable to simply throw them away. If the full potential of the currently deposited plastic waste were used in an environmentally friendly way applying the best recycling and energy recovery methods and technologies, many millions of tons of plastic could be recycled. This would also make it possible to generate large amounts of heat and electricity. Appropriate measures are required for such improvements in order to stop the disposal of plastics and to set up recovery-oriented collection systems. These must be reconciled with modern sorting infrastructure and improved recycling and recovery processes in order to exploit the full potential of this valuable resource. Recycled plastics can be reused in many everyday products, e.g. in clothing, in vehicle parts, in packaging products and for many other purposes. However, too little plastic is currently being recycled, although innovative technology such as Perception Park’s Perception STUDIO would offer the needed potential. “A distinction e.g. between polypropylene and polyethylene or other materials that look very similar at first glance, hyperspectral imaging makes it easy to do so. With our Perception STUDIO, appropriate systems can be developed even by people who have little or no experience with the subject of spectroscopy. The technical possibilities for a significant expansion of the recycling quotas for plastics are therefore already available and for environmental reasons should be used substantially“, Burgstaller expresses his hopes for the future.

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Perception Park GmbH
http://www.perception-park.com

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