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Invisibility like Predator, Ghost in the shell

  1. Jul 11, 2017 #1
    What do you think about invisibility suits? One possibility would have lots of mini cameras and pixel that mimic the background of body on the front of the body. But is it a bit realistic to entirely hide a human from different angles and wavelengths, from sensors too? Another option i thought, that the suit transform visible and IR light to radio waves in analog way. Radio waves go through the body, then transformed back. Alhough metallic equipment is really unpleasant in this situation. I wondered that cloak around metallic stuff should be inflated to be spherical, so at least no problem with which pixel on the foreground belongs to cam on background.
     
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  3. Jul 11, 2017 #2

    scottdave

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  4. Jul 11, 2017 #3
    Getting invisibility to work in a useful way would require something that doesn't exist yet, which I call a "superpixel".

    Imagine a video display that is a 360° cylinder with the person hiding inside:

    All existing displays attempt to make each point on the screen look the same regardless of where the viewer is. (Viewing angle). For invisibility to work, each point on the the surface of the cylinder would need to be able to project different colors in different directions. Nintendo's 3ds does this to a very limited extent, (two images, one for each eye) but you'd probably need thousands or millions of images for the effect to work in the field.

    What's more, the brightness of the display would have to match that of the objects behind what is being hidden. In daylight, the power requirements would be immense and the heat would likely bake the person hiding inside.
     
  5. Jul 11, 2017 #4
    Thank you. Well ín order tó complete the mission one dont have tó be invisible from áll directions. At worst four camera watching an intersection, and possible tó track someone tó security core
     
  6. Jul 12, 2017 #5
    Not all: http://www.3dfusion.com/glasses-free-3d-optics.html And that's not the limit. I heard of displays with 64 different directions.
     
  7. Jul 13, 2017 #6
    True, but presumably you can't control where the intended target goes, so you do need some flexibility. In the example with the car, there is a question of why hide a car on a city street? Wouldn't a regular car be less conspicuous than a pixelated distortion blob?
     
  8. Jul 14, 2017 #7
    The pixelated distortion blob makes the regular car even less conspicuous.
     
  9. Jul 14, 2017 #8
    So far I have not witnessed pixelated distortion blobs where a car is supposed to be.
    Well yes, there was that one time at a party ages ago.
     
  10. Jul 17, 2017 #9
    An agent has to hide from cameras. Not a car.
     
  11. Jul 20, 2017 #10
    I would envision fabric strands of some nylon or polyesters who would have embedded pixels axially on the outer perimeter woven in such a way it would mimic an LED based screen but pliable like fiberglass/nylon/polyester cloth... such a fabric could be made into the fabled cloak of invisibility which Frodo used to mimic the rock in the Lord of The Rings book/movie.

    I don't see why with today's technology and miniaturization such a feat could not be done... some engineering materials science majors could take this on. Meta-materials were sort of on this wavelength.

    http://www.iop.org/resources/topic/archive/metamaterials/
     
    Last edited: Jul 20, 2017
  12. Aug 8, 2017 #11
    Total invisibility is not required at all. You have seen the demonstration where people were asked to count the number of people with black T-shirts in a video. Afterwards, they were asked if they saw anything unusual; usually no one saw anything out of the ordinary. What actually occurred was as man in a gorilla costume wandered in from the right moving through the crowd, stopping to talk, then moving off to the left. If you don't expect it, you probably won't see it!

    So, the ideas proposed here need only be partially effective to work. Let's do it!
     
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