What is parallax? - Definition from WhatIs.com
Part of the Multimedia and graphics glossary:

Parallax is the way an object’s position or direction seems to change depending on viewing angle. To experience this phenomena, simply cover one eye and focus on an object. Then move the cover to the other eye. Because each eye provides a different viewing angle, the object will appear to move.

In 3-D imaging, this phenomena is used to create the illusion of depth. A 3-D television that doesn't require glasses, for instance, can use a filter called a parallex barrier. The filter, which is a series of slits on the LCD panel, permits each of the viewer's eyes to see a different set of pixels. The viewer's brain combines the  pixels from each eye's viewing angle into one image which has the illusion of depth. The parallax barrier filter can be switched off to provide backward compatibility with 2D content. 

See also: auto 3-D

Continue reading about parallex:

Titanic: How do you convert a movie to 3D, anyway?

This was last updated in May 2012
Posted by: Margaret Rouse

Related Terms

Definitions

  • pixel

    - The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image. (WhatIs.com)

  • lossless and lossy compression

    - Lossless and lossy compression are terms that describe whether or not, in the compression of a file, all original data can be recovered when the file is uncompressed. (WhatIs.com)

  • image metadata

    - Image metadata is information about an image that is associated with the image file either automatically or deliberately added. (WhatIs.com)

Glossaries

  • Multimedia and graphics

    - Terms related to multimedia, including graphics, animation and video definitions and words and phrases about images and sound.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.