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Video Processing and Blend Management

In addition to physically aligning the projectors, a blended projection system needs a way to distribute the correct portions of the image to each projector and manage the overlapping areas.

This can be accomplished through dedicated video processing hardware, playback software, or the projectors' built-in blending capabilities.

Some of the systems we may use include:

  • Barco ImagePRO / ImagePRO Dual: Used for signal scaling, routing, and distributing portions of a larger image to multiple projectors. The exact overlap and blending capabilities depend on the model and system configuration.

  • Pixelhue Processors: Can be used to configure widescreen canvases, manage multiple projector outputs, and, on supported models, apply edge blending adjustments.

  • Resolume Arena: Uses Advanced Output to divide a composition into multiple slices, map those slices to individual projectors, and apply edge blending.

  • ProPresenter: Supports blended audience screens, allowing content to span multiple projectors with adjustable overlap and brightness compensation.

Regardless of which system is used, the basic requirements remain the same:

  1. Each projector must receive the correct portion of the overall image.

  2. The images must share the appropriate overlapping content.

  3. The physical overlap and the content overlap must match.

  4. The overlapping areas must be adjusted to produce a consistent image across the screen.

It is important to understand the difference between distributing an image across multiple outputs and actually blending those outputs. A processor may handle the image sizing and distribution while the projectors themselves perform the edge blending. Other systems can handle both functions.

The equipment being used will determine where these adjustments are made.