Xeon E5-2603 processors, two NVIDIA Quadro K5000 GPUs, and 16GB RAM. They are driven by a Windows 8.1 PC with two quad-core 1.80GHz Intel They also feature off-axis projection and lens-shift, allowing them to be placed 2m high without experiencing serious perspective distortion.
Our projector models are short-throw, the closest ones are 1.45m away from the screen so users can approach the display without creating unwanted shadows. The projectors are arranged in a 3×2 configuration, and mounted under horizontal scaffolding beams attached to the ceiling. Our screen is sized at 4×1.5m, so users can get up to 2.5m close to the screen without being able to discern individual pixels.
Our design uses six BenQ W1400 commodity-level projectors (1920×1080px each) providing a maximum resolution of 12.4 megapixels. We use Nvidia’s GPU utilities and programming interface ( NVAPI) to avoid struggling with many issues faced by past multi-projector deployments. This project hosts the code for warping and blending our tiled projector display wall in the Rainbow Laboratory at the Cambridge Computer Lab.
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