Question

can u kindly give a concept that what is 2D AND 3D AND WHAT IS THE DIFFERENCE BETWEEN THEM??

Answer 1

Please be specific, are you asking for Computer Graphics ?

Answer 2

array?

Answer 3

2D means two dimensional. 3D means three dimensional. A dimension can be seen as a direction or co-ordinate, perpendicular to the others. So for example a 2D object might have 'width' and 'height' as its dimensions. A 3D object would have 'width', 'height' and 'depth'. A drawing on paper is for all practical purposes 2D, while a sculpture is 3D.

Answer 4

no no........i know 2d and 3d array.....for example in movie hall,they use 2D or 3D picture....i want to know that in computer graphics how they use 2d or 3d???

Answer 5

2d and 3d displays both use the same 2d screen. The appearance of 3D can be achieved using one of several methods. Movie theaters used to do it using colour filtering: a set of '3d glasses' are worn, one lens filters out certain frequencies of light and the other lens a different frequency. This however meant that the colours of the movie were affected, so it didnt remain popular.

Modern 3D screens might use polarised light, again with two lenses which block different polarities. Or they might use active 3D shutters, which rapidly flickers between blocking out the left and right image to match the left and right image displayed.

Another method worth mentioning is autostereoscopy, which doesn't require special glasses. The screen has a special grid on it so that one half of the image is blocked at a certain angle and the other half is blocked at another angle. Since your eyes are at slightly different angles from the screen it can perceive two separate images which allows it to fool you into thinking it's a 3d image.

Hope this is the kind of thing you're looking for. For more info, Wikipedia has a fairly decent page on stereoscopy, or you could try something like HowStuffWorks.com : http://electronics.howstuffworks.com/3d-tv.htm