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You're reading from OpenCV for Secret Agents

Product typeBook

Published inJan 2015

Reading LevelIntermediate

PublisherPackt

ISBN-139781783287376

Edition1st Edition

Languages

C++

Tools

OpenCV Android

Concepts

Computer Vision

Author (1)

Joseph Howse

Seeing things in another light

Although we began this chapter by presenting Eulerian video magnification as a useful technique for visible light, it is also applicable to other kinds of light or radiation. For example, a person's blood (in veins and bruises) is more visible when imaged in ultraviolet (UV) or in near infrared (NIR) than in visible light. (Skin is more transparent to UV and NIR). Thus, a UV or NIR video is likely to be a better input if we are trying to magnify a person's pulse.

Here are some examples of NIR and UV cameras that might provide useful results, though I have not tested them:

The Pi NoIR camera (http://www.raspberrypi.org/products/pi-noir-camera/) is a consumer grade NIR camera with a MIPI interface. Here is a time lapse video showing the Pi NoIR renders outdoor scenes at https://www.youtube.com/watch?v=LLA9KHNvUK8. The camera is designed for Raspberry Pi, and on Raspbian it has V4L-compatible drivers that are directly compatible with OpenCV's VideoCapture class...

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OpenCV for Secret Agents

Published in: Jan 2015Publisher: PacktISBN-13: 9781783287376

Author (1)

Joseph Howse

Joseph Howse lives in a Canadian fishing village, where he chats with his cats, crafts his books, and nurtures an orchard of hardy fruit trees. He is President of Nummist Media Corporation, which exists to support his books and to provide mentoring and consulting services, with a specialty in computer vision. On average, in 2015-2022, Joseph has written 1.4 new books or new editions per year for Packt. He also writes fiction, including an upcoming novel about the lives of a group of young people in the last days of the Soviet Union.
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Seeing things in another light

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