Optoma UK

Insight, commentary and discussions on the AV and projection industry, with the odd ‘how to’ article thrown in for good measure

The wide world of edge blending

You want to get an extra wide image across the wall - then you’ll probably need to combine two or more projected images to make a single seamless image. This is called edge blending.

The images are firstly overlapped and then visually joined together using an edge blending processor/software, such as the Optoma Chameleon GB-200.  Once these are blended, it is imperative the projectors do not move. If they do, your edge blend will come out of alignment.

So, before you start there are a number of factors to consider.

•    Partition walls, mezzanine floors and suspended ceilings are not ideal environments as they are subject to movement and vibration.
•    Large open spaces such as exhibition halls may get air movement, which may affect alignment.
•    Long mounting arms will amplify any movement so should be avoided.
•    Content resolution needs to match that of the projected resolution. Content with a resolution dissimilar to the combined native resolution of the blended projectors will make set-up more complex and cause the image to be stretched or distorted.
•    Have a minimum overlap percentage of 20% and avoid text on the overlapped areas.
•    Avoid people touching the projectors.  Can visitors reach the installation? Would cleaners or contractors on site knock the projectors?

Further help
Take a look at our handy guide.

Or to see a step-by-step video tutorial of edge blending using the Chameleon GB-200 visit the Optoma EMEA YouTube channel:
•   Manual blend of two or more projectors
•   Auto blend for two projectors

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