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1080p on 8 meter screen

Started Nov 25, 2020 | Discussions thread
threed123
threed123 Senior Member • Posts: 1,490
Re: 1080p on 8 meter screen--you can do it!

rablaw 3d wrote:

I project on 4 meter wide with distance of 4 meters. I tested on some viewers (30 friends) and they were very comfortable. So for bigger screen You say I must have further distance.

Yes, for several reasons. As the screen gets bigger so do the pixels, so you want to make sure that viewers can't see the pixel grid.

As for upscaling. All 4K projectors will upscale 1080p images to 4K, unless you are using a projector that has a vibrating 1080p imager that produces 4k from that imager, but stops vibrating when showing 1080p 3D. But two single 4K projectors will project 2D 4K images for each eye.

But, if you are using twin 4k projectors using passive 3D glasses. You will need a screen that maintains polarization of eye image of course, not all screen materials do that. That is the downside. The upside is that each image can be 3840 x 2160 pixels vs. 1920x1080 pixels, therefore projecting a more detailed image. When your eyes merge two 4K images, they don't actually see a 4K 3D image, but more like an 8K 3D image. Reason being there is a phenomenon when watching 3D images where each eye is NOT seeing the same pixels as the other eye, but a combined set of pixels that get fused into a 3D image, thus basically doubling the pixels to the brain. It's the reason why 3D images sometimes look more detailed than flat 2D images of the same scene.

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