C2-7000 S
ERIES
O
PERATION
M
ANUAL
81
12.0
EDGE-BLENDING SETUP
12.1
Introduction
Edge-blending is a method whereby two or more video/data projectors are
used together with part of their images overlapping, thereby creating a wider
(or taller) display more suitable for showing wide-screen video images. The
term edge-blending relates to the fact that the overlap needs to be carefully
handled to prevent the overlap causing image brightness problems.
This guide is intended to summarise how to setup such projectors when used
with a suitable number of TV One’s CORIO®2 scaling engines. The C2-7000
series are dual processors and therefore require only a single unit to perform
both tasks, whereas other units will generally require two units to be used
together, with a distribution amplifier on the input so that both units receive an
identical video source.
Because the two overlapping areas will create a brighter than normal image,
‘blending’ is performed on the edges to allow seamless merging of the images
together. The ‘blend’ is basically an S-shaped curve that is applied to
gradually reduce the brightness of the image at the edge, so that they can
overlap properly:
Image 1
Image 2
Basic method of overlapping two projection images to create a larger one.
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