Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by Genmutant on Friday March 07, 2014 @05:28PM
(#7363163)
In university we have cameras over some parts of the professors table which are directly projected on the screen. Works great without the the drawbacks of an overhead projector.
Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by Crito on Friday March 07, 2014 @06:03PM
(#7363312)
I think that is probably the solution. I've seen somewhat similar systems that tried to be more technically advanced than that, but they always made things worse. Just a straight-up camera-feed to the projector would work great though.
The advantage of these over overhead projectors would still be pretty small though (really only the being blinded and replacement bulbs issue), so you would need to ensure that the system is rock-solid reliable. If not, then you've just made it worse by making it more advanced.
Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by Steuard on Friday March 07, 2014 @06:43PM
(#7363488)
Document cameras like this work very nicely, but there is one small downside I've noticed: their framerate tends not to be very good. That's usually not a problem at all, but I have a couple of physics demos where I roll things around on an overhead projector, and the document camera often can't keep up with quick motion. Simple analog light and shadows obviously have no issues with that at all.
Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by OoTLink on Friday March 07, 2014 @10:42PM
(#7364141)
overhead projectors are a bit dimmer and can't make nearly as big (or uniform) an image as the document cameras can.
Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by sean-duffy on Friday March 07, 2014 @06:13PM
(#7363365)
Exactly this, in university one of my professors in first term rather than using slides, printed his slides onto paper and put them under one of these cameras, visualisers as they're called. I found it much more engaging since he could easily annotate things and just get a blank sheet of paper if anything needed further explanation.
Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by zokier on Saturday March 08, 2014 @10:22AM
(#7365397)
When I attended lectures with such cameras (which was some years ago) they were pretty horribad. Low contrast, low framerate, and motion blur everywhere. Probably had tons of latency too.
Re:LHC Physics Center bans Powerpoint, switches to whiteboar...
by aceofspades19 on Friday March 07, 2014 @06:17PM
(#7363400)
My math professor hooks her Windows tablet to the projector and then draws on that using Onenote which works out pretty well
There were a few things wrong with them (painful to look at while operating, and the bulbs tended to burn out if you moved them around while turned on) but fundamentally I don't think they were broken technology. Overhead projectors would be well complimented by computer projectors, but computer projectors make a poor replacement for them. Attempts to replicate the advantages of overhead projectors on computer projectors always fall flat, as far as I have seen.
I think the demise of overhead projectors is an example of a regression caused by our tendency to have rose-tinted glasses whenever considering more technological alternatives to existing technology.