Soft Edge : Purpose; Soft Edge Basic Principle - Barco Galaxy NH-12 User Manual

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Soft edge : purpose

What is the Basic Principal of (electronic) Soft Edge ?
The principle of edge blending is achieved by linear modulation of the light output in the overlap zone so that the light output in that
zone equals the light output of the rest of the image.
Light output per image
Total composite light output
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Soft Edge Basic Principle

Internal versus external (Alpha planes)
The projector offers 2 methods to achieve soft edging :
1. Internal soft edges : the contour and shape can be adjusted in the projector using the soft edge edit wizard
2. External Alpha planes : An external file is sent to the projector and is memorized. This file contains data corresponding to the
shape contour of the soft edge
Soft Edge Preparations
To ensure proper soft edge adjustment, be sure that the following adjustments are done perfectly on all projectors:
• Geometry
• Color Matching (Input Balance, Dynacolor ...)
When projecting on a cylindrical screen, the adjustments mentioned above can be done by using the projector
adjustments in combination with Polaris.
Polaris is a Test Pattern Generator software that can generate a user-defined test pattern that is used to align
projection systems. It also has the ability to generate predefined patterns for standardized projection sys-
tems. The software is developed to run on IRIX (Order numbers for Polaris: R9898300 for a 6 months license,
R9893301 for a full license).
Note that the soft edges are placed on the distorted image i.e. it surrounds the limits of the distorted image.
R59770122 BARCO GALAXY NH-12 04/05/2011
Adjustable overlapping area
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50%
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7. Advanced
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