Reply To: Long throw projector workaround?

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#111514
Oliver Kreylos
Keymaster

With a long-throw projector, you basically have to use a mirror to fold the projection light path to get the throw distance you need in a compact package. Adding a mirror adds complexity and causes more rapid loss of calibration, which is why we recommend short-throw projectors.

If you do put in a mirror, try lining things up such that the projection onto the sand is still on-axis, meaning that the natural image is as close to a rectangle as you can get. That way focus is more consistent.

No matter how your image ends up, don’t use your projector’s digital keystone correction to rectify it. The AR Sandbox does its own keystone correction as a result of projector calibration, and it works much better because it works on the source 3D data instead of the generated 2D pixel image.

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