How to View Anaglyph Images ?

A pair of eyeglasses with two filters of the same colors, once used on the cameras (or now simulated by image processing software manipulations) is worn by the viewer. In the case above, the red lens over the left eye allows only the red part of the anaglyph image through to that eye, while the cyan (blue/green) lens over the right eye allows only the blue and green parts of the image through to that eye. Portions of the image that are red will appear dark through the cyan filter, while portions of colors composed only of green and blue will appear dark through the red filter. Each eye therefore sees only the perspective it is supposed to see.

Producing anaglyph images

        In historical methods using camera filters, on film, two images from the perspective of the left and right eyes were projected or printed together as a single image, one side through a red filter and the other side through a contrasting color such as blue or green or mixed cyan. As outlined below, one may now, typically, use an image processing computer program to simulate the effect of using color filters, using as a source image a pair of either color or monochrome images. Since the 1970s Stephen Gibson offers his patented "Deep Vision" system using cyan instead of green filters. These colors cover the entire visible spectrum, providing more natural color. "Deep Vision"-spectacles have the red filter over the right (!) eye and the cyan over the left. (To bypass Gibson's patent some companies produce red/cyan-glasses with the colors on the wrong sides.)

What are Anaglyph Images ? 

Anaglyph images are used to provide a stereoscopic 3D effect, when viewed with 2 color glasses (each lens a chromatically opposite color, usually red and cyan). Images are made up of two color layers, superimposed, but offset with respect to each other to produce a depth effect. Usually the main subject is in the center, while the foreground and background are shifted laterally in opposite directions. The picture contains two differently filtered colored images, one for each eye. When viewed through the "color coded" "anaglyph glasses", they reveal an integrated stereoscopic image. The visual cortex of the brain fuses this into perception of a three dimensional scene or composition.

How to see stereograms?

Here are several techniques that maybe could help you in seeing stereograms.These are helpful for converged viewing, where you look through and past the image as opposed to cross-eyed images. Converged images are much more popular in general, however, the cross-eyed technique has one major benefit. They can be used with very large images, the size of billboard, or larger. The cross-eyed technique can also be easier to see, since can simply look at a pencil tip between you and the image to create the correct focus.

How to make viewing stereograms easier:

• In general, you want bright lighting when you are learning to view 3D illusions.
• Some people who wear glasses will find it easier to if they take them off as long as they can move close enough to the image to see it clearly.
• Look straight on, don't twist your head. The 3D illusion is most apparent with your head level.
• Be relaxed and give it some time.

Deataching...

What is a stereogram? 

               “A stereogram is an optical illusion of depth created from flat, two-dimensional image or images. Originally, stereogram referred to a pair of stereo images which could be viewed using stereoscope. Other types of stereograms include anaglyphs and autostereograms.

               Stereogram was discovered by Charles Wheatstone in 1838. He found an explanation of binocular vision which led him to construct a stereoscope based on a combination of prisms and mirrors to allow a person to see 3D images from two 2D pictures.

             Stereograms were re-popularized by the creation of autostereogram on computers, where a 3D image is hidden in a single 2D image, until the viewer focuses the eyes correctly.”
Source : Wikipedia

What is 3D?

Everyone knows what it is about 3D ,you can see it all time.Here is a good description that i found it on the www and I think this is the best description of the 3D term.

3D is a system or effect that adds a three-dimensional appearance to visual images, as in films, slides, or drawings.(3Dimensional) Refers to objects that are rendered visually on paper, film or on screen in three planes (X, Y and Z). In the computer, a 2D drawing program can be used to illustrate a 3D object; however, in order to interactively rotate an object in all axes, it must be created as a 3D drawing in a 3D drawing program.