0orksecurity 8 years ago ReplyUpvoteThis 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 8 years ago ReplyUpvoteWell, one way is to introduce the reverse error when shining the projector on a mirror to project to the wall.
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8 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.
8 years ago
Well, one way is to introduce the reverse error when shining the projector on a mirror to project to the wall.