The new technology will turn any window into a surveillance camera

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<pre>The new technology will turn any window into a surveillance camera

The team of assistant professor Rajesh Menoma from the University of Utah has developed a passive light intercept technology that passes through ordinary glass or its analog. For example, almost every window has a lot of interesting things, but to capture this, we need to put in front of him an active device: a video camera. And the new technology allows to partially bypass this limitation.

The prototype of the Menom installation looks like this. A simple optical sensor is attached to the end of a sheet of transparent plexiglass or glass, all the opposite faces are glued with a reflective tape. We include in front of the glass a certain image source, for example, an LED panel on which simple symbols are displayed. 99% of the light falls on the glass near the right angle and passes on, but 1% is scattered in the thickness of the material and the photons run to the edges of the plate. Here they are reflected from the tape and fall into the receiving window of the sensor.

While these are just spots, you need a special algorithm that converts the light scattered into the glass into the original image, but Menom's team just finished work on it. The output is a coarse-grained, but quite recognizable image. That is, it is enough to take a very simple set of accessories and provide a connection to a computer or other computing device so that any window can be turned into a video camera.

Now Menom's team is working on using more powerful sensors and is learning to intercept light from weak, non-directional sources. Practical application of technology they see in automatic surveillance systems – with this low quality of the picture you need to design cameras not for people, but for machines. For example, for situations where it is important to track the fact of movement in the field of observation, without additional expenditure of energy.

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