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| Introduction to 3D |
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Parallax
The creation of 3D images requires parallax, a change in distance as observed from two locations. The amount of parallax must be determined. This value is generally equal to two or three times the width of a lenticule. A lenticule is the width of a single lens element of the lenticular lens material. Typically the lenticular lens is designated by its frequency. For example 32 lines per inch (lpi). This means that each lens is 1/32 of an inch or .03125 inches in width and is known as the lens pitch. In our example, the parallax is approximately .078125 (2.5/32). Parallax is the distance elements in an image move from frame to frame in a perspective sequence and is the key to creating the stereoscopic effect that is observed in a 3D lenticular image. The parallax is used to determine the distance that the camera will move on the linear track. It is important to understand that the parallax used is usually less than the amount that is calculated and is a function of numerous factors that can only be learned by wrote. Some of the most important factors are image detail, the lenticular image reproduction process, the lenticular lens material properties, desired lenticular effect, volume of space in the scene and the focal length of the lens. The calculations and procedures described below are basic guide lines designed to give good results on your first attempts at lenticular imaging and should serve as a jumping off point for your own creative techniques. Copyright (C) 1999-2010 Digillax Systems. All rights reserved. | ||
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Last update Friday, November 26, 2010 05:20:35 AM