Search the web
Sign In
New User? Sign Up
small_planetarium · Small or Portable Planetarium Group
? Already a member? Sign in to Yahoo!

Yahoo! Groups Tips

Did you know...
Want to share photos of your group with the world? Add a group photo to Flickr.

Best of Y! Groups

   Check them out and nominate your group.
Having problems with message search? Fill out this form to ensure your group is one of the first to be migrated to the new message search system.

Messages

  Messages Help
Advanced
New Spherical Mirror System   Message List  
Reply | Forward Message #1523 of 1541 |
Re: softwawre for warping videos?

> Hello everybody, is there a software in the market, to warp dvds or
> video to protect them with a mirror?

Perhaps it is time to add this to the FAQ ....

From the thread it does appear you wish to project standard video content,
rather than fisheye. There are a few ways of doing this, I suggest the last
option is the best.

1. You simply project the material as if it was a fisheye. The result is a
maximally distorted image on the dome. Can work tolerably well for abstract
content, for example: music visualisers, fractals, etc.

2. Using warpplayer I can create a mesh that will present the DVD material on
the dome at various sizes as if it was residing on a plane, or cylinder in 3D
space. In general, the pixel efficiency is generally quite poor, that is, for
the less distorted image only a small part of the available pixels in the
projector frame are used.

3. You simply point the projector directly at the dome, for a standard spherical
mirror setup this involves moving the projector, not a good thing to do during a
session when the projector is hot. With most commodity projectors, and certainly
the ones most people are using with the spherical mirror, the image on the dome
will be modestly small but also minimally distorted.

4. You leave the projector where it is but lift out the spherical mirror and
replace it with a planar mirror. This folds the light path and effectively means
the projector is a meter further away (outside the dome) so you get a slightly
bigger image on the dome and still relatively undistorted. No need to move the
projector.

Anyone using other techniques that I could add to the FAQ?





Tue Nov 3, 2009 11:23 am

pauldavidbourke
Offline Offline
Send Email Send Email

Forward
Message #1523 of 1541 |
Expand Messages Author Sort by Date

Hi everyone ! Last year, when I was considering my options for a new career as a mobile planetarium presenter, I saw a spherical mirror projection system in...
adamsgen
Offline Send Email
Oct 28, 2009
8:34 pm

... The "domebox" looks great, even though I am personally not a huge fan of double mirror systems I appreciate their advantages for portable systems. How does...
pauldavidbourke
Offline Send Email
Oct 29, 2009
12:41 am

Paul, Glad you like my design.  It looks like a mysterious "Black Box" when closed up but the colour can be easily modified by the user. The internal width...
Steve Adams
adamsgen
Offline Send Email
Oct 29, 2009
10:54 am

... That is quite important since most non-professional projectors are "overcooked" in order to squeeze out every ounce of brightness. A stressed cooling...
pauldavidbourke
Offline Send Email
Oct 29, 2009
12:03 pm

... Paul said it quite well, there are many links in the chain. As someone who is using a system with both a spherical mirror and a flat mirror, I would say...
jdunn@...
spacecraftinc
Offline Send Email
Oct 29, 2009
4:23 pm

Hello everybody, is there a software in the market, to warp dvds or video to protect them with a mirror? i have been looking for one, but maybe sombedy in the...
Oscar Kim Morales
kimsurfer1975
Offline Send Email
Nov 2, 2009
9:39 pm

... Oscar: I'm presuming what you want to project is in dome master format. Paul will probably answer, but he has software for the Mac that does warping in...
Jack Dunn
spacecraftinc
Offline Send Email
Nov 2, 2009
9:56 pm

Hello Jack. thank you for your answer, i have alittle inflatable dome, and want to project some dvds in little town schools here in Mexico. i have PCs, so i...
Oscar Kim Morales
kimsurfer1975
Offline Send Email
Nov 2, 2009
11:06 pm

... Oscar: I fear you are confused about format and fulldome and the mirror. You would be better off just projecting your DVD directly rather than off of a...
Jack Dunn
spacecraftinc
Offline Send Email
Nov 2, 2009
11:30 pm

Oscar, "Our program" -- TGAWarper/JPGWarper for Windows -- is really Paul Bourke's MacOS program Tgawarp, recompiled to run on the PC platform. It doesn't...
marklnp
Offline Send Email
Nov 4, 2009
2:00 am

Mark. thanks for your reply, i guess after reading all of the info from everybody, i will have tu buy a show from one of the companies offering the shows, i...
Oscar Kim Morales
kimsurfer1975
Offline Send Email
Nov 4, 2009
4:27 pm

Dear Oscar In order to ward dvd's or video to project with a mirror, at Navegar Foundation we have been working on two different solutions. - One, a realtime...
pedrosaantonio
Offline Send Email
Nov 2, 2009
11:27 pm

Hello Antonio. yes i was talking about regular DVDs, not fish eye or any other planetarium videos. i am checking on your web page to know a little more about...
Oscar Kim Morales
kimsurfer1975
Offline Send Email
Nov 2, 2009
11:31 pm

... Perhaps it is time to add this to the FAQ .... From the thread it does appear you wish to project standard video content, rather than fisheye. There are a...
pauldavidbourke
Offline Send Email
Nov 3, 2009
11:24 am
Advanced

Copyright © 2009 Yahoo! Inc. All rights reserved.
Privacy Policy - Terms of Service - Guidelines - Help