0orksecurity 10 years ago This is known as "keystoning". Serious cameras used for taking pictures of architecture and things like that use lenses that can be shifted offcenter to correct for parallax ; something similar ought to work in a projector. https://secure.wikimedia.org/wikipedia/en/wiki/View_camera#MovementsVideo projectors generally solve this in the electronics instead, by distorting the image to compensate... cheaper, but loses some resolution.
0seandogue 10 years ago Well, one way is to introduce the reverse error when shining the projector on a mirror to project to the wall.
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10 years ago
This is known as "keystoning". Serious cameras used for taking pictures of architecture and things like that use lenses that can be shifted offcenter to correct for parallax ; something similar ought to work in a projector.
https://secure.wikimedia.org/wikipedia/en/wiki/View_camera#Movements
Video projectors generally solve this in the electronics instead, by distorting the image to compensate... cheaper, but loses some resolution.
10 years ago
Well, one way is to introduce the reverse error when shining the projector on a mirror to project to the wall.