beamer / webcam angle

Posted by eelke on Implementation, Hardware

after doing some tangens calculations…

ceiling 3m

projection on floor: 3m x 4m

necessary angle: 53,2 degrees x 67,4 degrees

HP has a webcam that does that, or at least they in 2006:

Engadget review of wide angle hp webcam

the big question is, what is the maximum projection angle of an average beamer?

according to the projection pros there is such a thing as the throw ratio, which is defined as Distance to screen / width of projected image.

distance to screen = ceiling to ground = 3m

width of projected image = 4m

wanted throw ratio = 3/4

but from a hardware site I found out that a normal throw ratio is somewhere around 2.

Comments

Tuesday March 3, 2009 @ 03:16

keyvan

I haven't found any technical details on how this is done, but these 3D projections look very impressive: http://www.pablovalbuena.com/augmsculpt_condeduque_web.mov and http://www.pablovalbuena.com/videos/pza_letras_video.html

From what I understand there is a 3D model of the physical structure on the computer. The lighting effects on the 3D model are then projected and aligned with the physical structure.