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then if that container shows up in Montreal we’ll pick it because we’re sharing the same database,’ Camirand explained. In addition, because all the images are
saved it means the client can replay the tape if needed. Tere’s not always time to analyse everything, Camirand said, but images can be looked at again, which is useful for the client to find out what’s happening on their sorting lines, to analyse the overall productivity or the quality of the material being brought into and sent out of the plant. Waste Robotics uses Specim FX17
hyperspectral cameras; for lighting it uses halogen bulbs. ‘We’ve tried other more concentrated [lighting] solutions,’ Camirand said, with little success. He said that, ideally, he’d like to bring all the halogen light into a narrow line for line-scan imaging. ‘At the moment we use diffuse lighting, which is okay, but we’re using too much light and there’s too much heat to manage,’ he said. Filament-based light sources, like halogen
or tungsten, have a broad spectrum with a lot of shortwave infrared content and therefore radiate a lot of heat. Speaking during the webinar, Steve Kinney, director of engineering at Smart Vision Lights, explained that a light source with a broad spectrum can result in big differences between the highest spectral peaks of the
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‘Te material that’s missed and sent to landfill costs money’
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light and the lowest spectral components in the area of interest, which makes it difficult for the camera to assimilate all the wavelengths. He said using filters can help here or,
by using LED illumination, the output can be tuned to the wavelengths needed. Tere is less heat with LEDs, but also the narrowband nature of them – and the fact that each band can be tuned and the peaks flattened – means there is less dynamic range to soak up by the camera. Terefore, the camera’s dynamic range is used on the scene and not in the differences in the light source spectrum. Smart Vision Lights provides LED lighting
for both multispectral and hyperspectral imaging, although Kinney said that, largely, LED illumination is more suited to multispectral imaging. Camirand said that, at the moment,
waste sorting lines are being automated alongside manual labour. However, the end game is for fully autonomous lines that feed themselves. ‘Maybe they’ll go a little slower, but for longer days,’ he said. ‘Tat’s what we’re aiming for.’ O
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VL-8K7C-C80F-2 VL Series Color Dual Line Scan Cameras
Line Rate up to 80 kHz @ 8k Resolution 7 ㎛ Pixel Size 100x Anti-Blooming
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