Cameras can see through walls

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2018-02-01 19:00:04

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Cameras can see through walls

And you like the camera on your new smartphone? It can identify the person in the photo and video shoot in mode, slow-motion at the highest resolution. But these technological breakthroughs is just the beginning of a big revolution that is unfolding before our eyes. Recent research in the field of cameras are moving away from increasing the number of megapixels in favor of data fusion of cameras with processing power. And here we have in mind is not a processing style in Photoshop, when superimposed on the image effects and filters, but rather a new approach, when incoming data does not look like on the image. Image they become after a series of computational procedures, which often involve complex mathematics and modeling how light travels through the scene or the camera.

An Additional level of computational processing magically frees us from the chains of conventional imaging techniques. One day we will no longer need a camera in the conventional sense. Instead, we will use light detectors, which a few years ago nobody even considered to create images. And they will be capable of amazing things: to see through the fog, to look inside the human body, and even see through walls.

the

single-pixel camera

Among the curious examples of a single-pixel camera, which relies on a very simple principle. Standard cameras use many pixels (tiny sensitive elements) for capturing the scene illuminated with one light source (in most cases). But it can do the opposite: to capture information from a variety of sources of light using a single pixel.

You need a controlled light source, even a simple data projector, which illuminates the scene in one spot or issues a series of different patterns. For each of the spot light pattern or you can measure the amount of reflected light and to summarize it, creating the final image.

Obviously, the disadvantage of such photography is that you have to pass many lighted spots or patterns to create a single image (an ordinary camera will do this with one click of the shutter). But this form of visualization will allow you to create the image that the camera can not create, for example, wavelengths of light outside the visible spectrum that will not be able to capture the ordinary detectors of cameras.

These cameras can be used for creating photos through the dense fog or falling snow. Or they can imitate the eye of some animals and to automatically increase the image resolution (amount of detail that it captures), depending on what is on the stage.

You Can even catch images of particles of light that never interacted with the object you want to photograph. Thus it would be possible to use the idea of "quantum entanglement" — two particles can be entangled so that what happens with one will instantly affect the other particle, even if they are at a great distance from each other. It would be possible to study the properties of objects that change with the lighting. So, it would be possible to understand how the retina in the dark (obviously, not as light).

the

multi-touch visualization

Single-pixel imaging is just one of the simple innovations that appear in the latest cameras and rely on the traditional concept of image creation. However, currently we observe a growing interest in systems that use a lot of information, whereas traditional methods only collect a small part of it.

This is where we could use multi-sensory approaches that include a variety of detectors are aimed at one scene. The Hubble telescope was a good example of how it works, creating snapshots from the combination of many images taken at different wavelength. But today you can buy a commercial version of this technology, for example, embodied in the Lytro camera, which collects information about light intensity and direction in a single sensor, and then produces images that can be refocused after shooting.

The next-generation Camera will likely be similar to the camera Light L16, which is equipped with latest technology based on more than ten different sensors. Their data is combined using a computer to create a 50-needs, pereformuliruem and re-scaled image of professional quality. The camera itself looks like an interpretation of the phone camera in the style of Picasso.

And it's still the first steps to creating cameras to a new generation that will change our attitude to photos. Scientists working on the problem of shooting in the fog, through walls, and even plan to look at the body and the human brain. All of these methods rely on the combination of images with models that explain how light travels in different substances.

Another interesting approach is based on how the artificial intelligence "learns" to recognize objects in the data. These methods are inspired by the learning process that occurs in the human brain, and are likely to play a major role in future imaging systems.

Technology with a single photon and quantum imaging also gradually ripen — they will be able to take pictures in conditions of incredibly low light conditions and videos with incredibly fast speed, a trillion frames per second. This is enough to remove even the light passing through the stage.

Some of these applications will require more time for full development, but now we know that physics allows us to solve these and other problems by using a clever combination of new technologies and computing ingenuity.

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