Here is a link to edge blending with Nvidia cards
It is also worth noting that soft edge blending can hide or at least reduce a whole load of line up issues if you don't have anyone very experienced with projection. This give you an on screen resolution of 1792x768. Fitting 2 4m images on your 7m wide screen give you a very acceptable overlap of 1m or 25%. You have a screen height of 3m giving you a single screen width of 4m. This means you can use the extra brightness and resolution of two projectors.Īs an example. Here is a compatible card second hand for only £150, this will do your overlap and softedge for very little spend. Again these can be very expensive but you can get them second hand. You do have an option to use the workstation Nvidia Quadro FX graphics cards though. Watchout, Spyder, Encore etc all run into many thousands of pounds. The trouble is with soft edge blending as you have pointed out is budget, most pieces of kit that can generate a soft edge and overlap are very expensive. The most common way of getting rid of this is soft edge blending which is why most of the guys on the forum have mentioned it. You also lose the brightness of the part of the projected image that will end up off the side of the screen as two 4:3 images don't quite fit your screen, you will lose about 25% of the brightness which seem critical in this scenario. Imagine a horizontal line running up and down the whole image, where the outputs 'butt' together the line never quite meets unless it is still, one side is always behind the other, it is unfortunately a physical limitation of all graphics cards. When you 'butt' up two images, even from the same graphics card (I presume your source is a PC) you get synchronicity problems. What you are suggesting does have a lot of merit in terms of brightness and resolution, however you will come up with some fundamental problems. Any ideas on which method would work better? I was not suggesting overlaying the projectors images completely, although this perhaps could be an additional possibility. Imagine joining two 4:3 screens together. This would give us double the horizontal resolution. I may not have been especially clear on this: what I was suggesting was instead of having one projector filling the whole 7 x 3 m area, having two projectors each filling half of the area. I assume you have a way to replicate the signal. The fact is, you don't care about the edges of the images, you care about the center the most.
#Edge blending nvidia generator#
You should try very hard to get two identical model projectors with identical lenses, or you will have a nasty time.Īlso try to get a video generator with an alignment pattern. Years ago, Kodak Carousel stands were developed that permitted adjusting two or more physically close projectors independently, without disturbing one that isn't being tipped. Your challenge is to get the lenses of the two projectors as close together as possible (that's why stacking is often preferable to side-by-side), and to hold both of them steady. I've seen it done regularly with stacked projectors weighing up to 200 pounds each. It has the added benefit of keeping the show going if one of the projectors fails, which is very important to the clients. meetings and conferences) in large auditoriums today.
#Edge blending nvidia professional#
Your project is routine for the professional "speaker support" business (i.e. Sorry for the triple post! Late night and a slow internet connection. This seems to make sense to me, however can anyone more experienced offer any criticisms of this idea or alternative solutions?Ī concurrent post has been automatically merged from this point on. But it seems to be the only thing I can think of at the moment. Obviously not an ideal solution, as the edges will be tricky to line up and then the output to the projectors must be split over two display devices. Theoretically then, if one projector would provide 2000 lumens of brightness over a 7m x 3m area, using two projectors covering half the area each would provide 4000 lumens over the whole area. My potential idea for a solution to this would be to use two projectors with the edges aligned to create a larger image. However even with a white screen I'm worried the image won't be bright enough. I'm planning to do some testing and work out whether this is possible. We wanted to use black material, but we may have to use white if the projection brightness is not high enough.
We're projecting onto Rosco projection material. However I'm worried about the brightness level.
We may be able to borrow however, some business/standard brightness projectors, of about 2000 lumens. Due to us being an amateur theatre group, we're unable to pay for a high-quality, high-brightness projector. I'm planning a show which requires rear-projection onto a 7m x 3m screen at the back of the stage.