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How can we detect polyethylene from a distance?

The method should be mobile as I am thinking of employing it a mobile robot.

I have no idea about it.

Any suggestion or external link would be welcomed.

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  • $\begingroup$ It looks problematic at best. There are many types of PE; also it would be very hard to discern if it's not PP for example. $\endgroup$ – Mithoron Apr 9 '15 at 15:27
  • $\begingroup$ Cross posted to Robotics. $\endgroup$ – Mark Booth Jul 6 '15 at 11:59
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There is a growing literature on using near-infrared (NIR) hyperspectral imaging (HSI) to detect a variety of materials, including plastics. Here's one example that focuses on resolving polyethylene from the very similar polypropylene using NIR HSI.

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  • $\begingroup$ Are they avialable in the market? $\endgroup$ – sedflix Apr 21 '15 at 11:47
  • $\begingroup$ When I google for hyperspectral imager, many different companies selling products come up. Resonon, Bayspec, Imec, etc. etc. Depending on the setup, I'd expect a very basic camera to be $15000 to $30000 or more. $\endgroup$ – Curt F. Apr 21 '15 at 19:38

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