Whilst these stretched, light rejecting screens are incredibly effective, setting them up is not as simple as just using multiple projectors, which is where edge blending software comes in. People generally assume an effective projector display requires controlled lighting to work but our ALR screens produce a HD/4K image even in direct sunlight, producing the same stunning pictures even in huge 134” and stretched 217” screen sizes! One of our most popular projection technologies is our light rejecting projection films and screens. Whilst projection displays have become incredibly popular in recent years due to the demand for home cinemas, creating more specialist displays still require s some expert input.

With over 15 years of experience in developing and distributing projection technology, we’ve worked on our fair share of unique projects. If you can live with it, far easier to just project too images side by side I would say with a distinct black border since you can look deliberate about it, and not just a rough edge match.Posted May 20th, 2021 by Emily Burkinshaw & filed under But it is tough and usually requires extremely precise alignment with adjustable 5DOF mounts and well matched lenses (read - high end = expensive). As one of the inventors of several blending methods, I have achieved almost perfect blends with optical filters only but hybrid blending is best with a combination of hardware and software for all but the wonderful HDR laser projectors with over a million to one dynamic range (double modulators). But even with careful setup it is very fussy to get a really close edge match. If you are not bothered by making it look like one continuous image, two images sided by side is definitely easiest and has the lowest loss in pixel count, due to no overlaps.

There are solutions for this we used all the time in our simulators and VR Setups such as optical filters, Mystique software black blending or very expensive HDR laser projectors where black is truly black.

What Jacques refers to we called the “black blending problem” at Christie since most projectors “black” is not truly full black so the two overlaps sum to grey.

Multi projector edge blending