Talk:Keystone effect

Origin
Where does the name "keystone effect" come from? --209.121.43.163 (talk) 00:30, 7 May 2022 (UTC)

Advertisement
I have just come across this article and I have to say that it reads, to me, like a fairly well-balanced description of the actual problem as well as possible solutions to correct it. Certainly it mentions nVidia and their solution by name but it's just one line at the end of the article. I find it hard to see how you could make the case for this being an advert under the circumstances so I have removed the advert tag.  A u l a T P N 09:54, 1 October 2007 (UTC)

Images
I would suggest that the right image, of the trapezoidally distorted image, be changed to have the wider edge on top, since this is the most common keystoning scenario -- as mentioned in the article. Don Quixote de la Mancha (talk) 11:32, 5 August 2012 (UTC)

Theory
In the theory part, there is a formula for "the distortion" given. However, it is not descibed how exactly "distortion" is mathematically defined in this context. The effect as such is understandable from the pictures. But if the formula is connected with the keystone model at all, it should be made clear in which way. — Preceding unsigned comment added by 2A02:8071:2882:3C00:B57C:C179:979D:E58D (talk) 17:20, 15 March 2017 (UTC)

Description specific to particular application
This also occurs with eye glasses. Generic optic description of distortion for that purpose would also be helpful. — Preceding unsigned comment added by 71.181.111.125 (talk) 20:46, 9 December 2017 (UTC)