Soft Edge Adjustments - Barco NH-12 User Manual

7. Advanced
Light output per image
Total composite light output
Image 7-139
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.
7.9.7.2

Soft edge adjustments

What can be done ?
The soft edge adjustment consists of the adjustment of one or more edges of the image. Each zone where the blending is to be
applied is divided in 16 zones delimited by 25 adjustments points. These points are numbered from 0 to 25 and can be shifted to
the desired location to determine the total size and shape of the soft edge zone.
This high number of adjustment points allow to meet any complicated soft required for special curved screens.
The default soft edge size (prior to the adjustment) corresponds to 12.5% of the image.
130
Adjustable overlapping area
100%
50%
image 1
100%
50%
image 1
image 2
image 2
R59770121 NH-12 04/05/2011