Edge Blending; Edge Blending Algorithms; Basic Edge Blending; Advanced Edge Blending - Digital Projection FUSION User Manual

Fusion

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7 Edge blending

7.1 Introduction

Edge Blending is a companion feature to Image Geometry Correction. Edge Blending ena-

bles the seamless projection of a large image using several overlapping projectors. Since

geometry correction for projection on non-flat surfaces is a built-in requirement in almost all

Edge Blending systems, the pairing of Edge Blending and Image Geometry Correction in the

same video signal processor is a natural one.

The FUSION processing system support two different types of edge blending: Basic and

Advanced

Basic edge blending is used for simple and slightly curved surfaces. A percentage or a

defined number of overlapping pixels is specified. The overlapping region of each side (top,

bottom, left, right) of the image is then geometry corrected with the warping that is being ap-

plied to the image.

Advanced edge blending is used for more complex surfaces like a dome (spherical). With

advanced edge blending, warping and blending is completely disconnected. After correct

geometry correction has been applied, multiple blend areas are defined to create the seam-

less image.

To apply basic edge blending to an image, select "Blend" from the left hand toolbar, and

select Basic Blend Setup. The window in Figure 7-1 will appear.

Note! Overlap (shared pixels between two channels) must be applied in the IG.

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