Note: It is good to have a complete number of pixels and the same physical screen size when edge blending. Figure 1: Example overlapping regions of 3 SXGA displays. Each projector has a resolution of 1280×1024 (SXGA).
Modify the software application to have the same calculated overlap region.Īs an example, here we present overlapping regions based upon a three projector setup.Align the projectors to the calculated overlap.Three steps are required in order to produce an overlap region: In this overlapping area, edge blending is later applied. The auto-alignment system uses a camera to scan the projected image and adjust each projector’s image so that the images on screen remain in perfect alignment.Before edge blending can occur, the projectors and software application need to be set-up so that an overlapping region between the edges of adjacent projectors is present. To address the alignment problem, MediaMerge developed the ShowSource media server’s camera-based auto-alignment system. One of the biggest drawbacks to blended projection is that the projectors have to remain perfectly aligned on the screen, otherwise the image drifts and causes ghosting and other undesirable artifacts. By pushing elements out horizontally, more content can appear on a screen without increasing the screen’s reach upward.Īlso, blended projection has application on curved screens and dome theaters where the unique geometry of the screen makes standard projection difficult. How does MediaMerge use this technology?īlended projection can often provide a great solution for projection in spaces with limited ceiling height.
By adding the brightness and resolution of the individual projectors extraordinarily large images can be achieved for giant screen cinema and other specialty applications.
The other primary use is to produce very large images with unusually high resolution.
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