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BlendPRO – Wide Screen Image Processor
Manual # 26-0206000-00 / Revision A
Overview of Edge-Blending Technology
Edge-blending technology is becoming increasingly popular for supporting very large high-resolution displays. The
technology is very flexible and can support a wide range of screen configurations. A typical three projector system is
illustrated in Figure 1.1. As shown in the figure, multiple projectors are used to project on a common surface to create
one high-resolution image. The creation of a seamless image requires careful attention to detail. High quality results
are dependent upon a system-level approach that integrates content creation, video processing, projector setup and
system adjustments as described below.
Fig 1.1 Typical three projector system
Content Creation
When projecting an image across a large screen, it is very important to maintain sufficient resolution to obtain a crisp,
clear image from the perspective of the viewer. Generally, high-resolution source material needs to be used to
maintain image content that is pleasing to the eye. There are two methods that are commonly used to generate wide-
screen source material, each of these methods is explained below.
Use of a Single High Definition Image
High Definition source material has a resolution of 1920 pixels x 1080 lines. Images of this type can be reformatted to
drive multiple screens as indicated in Figure 1.2. The reformatting is usually performed by a seamless switching
system such as the Folsom ScreenPRO PLUS. Reformatting in the seamless switcher allows the resultant images to
be processed for providing seamless switching, integration of picture-in-picture video and keying features. Note that
the input image can be effectively spread to multiple screens, however, the inherent resolution of the output image
remains that of the source material, 1920x1080 pixels.
