Barco ScreenPRO-II User Manual page 82

3. Hardware Installation
Overview of Edge-Blending Technology
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Figure 3-7. Typical Blend Function
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Accurate projector setup is essential for creating seamless images. Please note the
following important guidelines:
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Edge Feathering
The overlapping image data in the blend region must be edge-feathered to
support a seamless optical blend. The transfer function must be programmable to
support blend regions of different widths and adjust to different video
characteristics. A typical blend function is illustrated below.
Blend Region
Image Intensity
for Image 1
The projectors must be precisely aligned to overlap the adjacent blending regions.
The brightness, contrast and color balance of the projectors must be adjusted to
provide a uniform appearance across the entire screen.
Custom test patterns and an alignment procedure are used to simplify this
process and provide an optimal result.
Mixing and matching projectors is not recommended as it makes the adjustment
process much more difficult.
Image Intensity
for Image 2
ScreenPRO-II Controller • User's Guide