3D- Technology

Introduction:

As it is well known fact that human eye can perceive only upto 3-dimension. 

In short we can say that 3-D technology is the illusion of depth , it is a visual representation system that tries to create or reproduce moving objects in 3rd

dimension. And it is a common perception of our brain that anything that happens

in 3-D feels to happen in real life.

Working:

The process by which an image turns into 3-D  is known as stereoscopic photography. In this process more than one, 2-D photographs are taken and

overlapped with each other produce a 3-D view.

How does human eye work?

Human eyes are approximately 50 mm to 75 mm apart — accordingly, each eye sees a slightly different part of the world.The image on either side should be pretty similar but slightly offset.  These  slightly different images enter the brain, at that  point brain does some high-powered geometry to make up for the disparity between the two images. This disparity is "3D" — that you're getting two different perspectives of the same thing.

How does 3-D glass work?

The modern 3D technology is trying to replicate, what have we discussed above . All those silly sunglasses and silver-coated projectors are all designed to feed our individual eyes different perspectives of the same image.

Types OF 3-D Glass:

Anaglyph 3-D Glass:

Anaglyph is a fancy way of referring to the red-and-blue glasses we used to wear. By projecting a film in those colors — one in red, one in blue — each eye would get an individual perspective and our brain would put the 3D effect together. Other colors could be used, providing they were distinct enough to be separated on screen.

It,s Drawback:

This technique, however, didn't allow for a full range of color and had a tendency to "ghost," or have the once-distinct images bleed into one another.

Polarized 3-D Glass:

 These polarized glasses,  take advantage of the fact that light can be polarized, or given different orientations. For example, one image can be projected in a horizontal direction while the second can be projected in a vertical direction. The corresponding glasses would allow horizontal polarization in one eye and vertical polarization in the other. 

It,s Drawback:

The problem is that this kind of 3D requires  to keep our head still. Tilting our head can distort how the waves get to your eyes, messing with the color and 3D effect.

Correction in polarized 3-D Glass:

To counteract this, 3D now uses rotational polarity, meaning the film being projected actually has two different spins to it. The glasses then pick up those opposite rotations — clockwise in one eye, counterclockwise in another eye — to separate the image. Now you can tilt our head as we want.

Future:

In the coming years, keep a look out for technology that uses autostereoscopy, or 3D that doesn't require glasses in any way. The Nintendo 3DS, Nintendo's newest portable 3D gaming device, is one such device. One of its tricks is syncing a lenticular display with its forward-facing camera. By using eye recognition, it can track where the user's face is and shift the display to accurately display 3D no matter how the user views the screens.