Edge Blending

Edge Blending occurs in both multi-projector display systems and in texturemaps. Both uses are similar, but with slightly different intent.

1. In multi-projector systems edge blending is the process of making sure that the point where the two projected images meet, or in some cases overlap, is seamless. The luminosity of both projectors is adjusted in the case of overlap so the combined image is no brighter than the rest, whilst the two images line up perfectly, so the user cannot tell visually where one projected image stops and the next begins. Instead the entire display looks to be one continuous display.

The task of adjusting an overlapping image so the combined outputs of the two projectors does not make the image too bright at tat point, is part of a process known as Linked Constant Light Output.

2. In texturemaps, edge blending is used to create seamless textures. The opposite edges of the texture graphic are adjusted so they match one another. This means that when two or more copies of the texture are laid side by side, the image flows contiguously, and there is no way to visually identify precisely where the edges of each texture are.

Texturemap edge blending takes place on all opposing edges so no matter how the texture tiles, it is always seamless.

See Also: Texturemap, Texture, Texturemapping, Linked Constant Light Output

Below, we offer a selection of links from our resource databases which may match this term.

Edge Blending

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A 'hands-on' approach to computers
A physorg article, looking at one man's quest to bring augmented reality interfaces for computation into existence - blending the computer interface with the physical world.

Large Image Display: The Stepford Wives: Blending Displays with Drapes
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Large Image Display: Toy Story: 1995's Cutting Edge
A look at the 1995 milestone movie Toy Story, and an interesting question is asked: Why are modern mainstream VRs only just coming out from the shadow of that world-quality, 14 years later?

Character Development and Storytelling for Games

Written by Lee Sheldon, a professional entertainment writer, with such credits as Star Trek: The Next Generation", "Charlie's Angels", and "Edge of Night" to his name, this book is all about writing good, solid, sweeping plots for interactive entertainment.

Ahuizotl
The Ahuizotl is a central american water beast, which catches its prey by luring unwary humans to the water's edge, then drowning them and feasting on the eyes, teeth and nails of the victim, but leaving the rest of the body untouched.

Knick Knack
Made in 1989, Knick Knack was a three minute short CG animation by Pixar Studios, featuring what was then the cutting edge of rendering capability, way beyond what real-time renders were capable of. To put it in perspective, this was just six years before Toy Story was released.

Virtual Light

Virtual Light is classic Cyberpunk in every sense: it is dark, and gritty, a surreal near-future world that sets you on edge, and both the main characters have sunk as low as it is possible to go, before attempting to change the world for the better.

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