08:30

How does 3D work?

With the recent buzz of 3D in cinemas I am curious to how it all works.

The illusion of 3D is quite a simple one and is only possible because we have two eyes, if we close one the illusion is broken. Our eyes are slightly apart and so they see from a slightly different angle each and because of this our eyes are able to create a sense of distance and depth which prevents us from seeing the world in 2D. Each eye sees 2D which is combined to create a 3D view.

The red and blue glasses use a kind of filtering system to our eyes. The screen displays two images and the glasses allow only one to enter each eye. Red/blue and red/green are the mainstream colours used for this effect. However this created bad image quality and so polarized is often preferred as it allows for colour images.

Polarization uses two projections of the same image with different polarization and the glasses only allow one projection into each eye.

As great as 3D can be I don't see what the whole sudden fuss about it is....like it's something new? It's been around for a long time but only now is it hyped about. So much so that the lion king has now been re-released as 3D in cinemas (not that I'm complaining as it was one of my favourite Disney films!). In my mind 4D should try and be incorporated into cinemas.....really get the audience into the movie by appealing to the other senses would be a big step forward in my opinion.

http://www.worldtvpc.com/blog/4d-technology-hits-south-korea/
This article gave me hope :D

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