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Photo Projection

Discussion

3 replies
Posted by Mark Kraus on August 2, 2006 at 7:10 AM
Does anyone know what is the best image resolution for projection in a slide program or something like power point? And does file format make any difference as long as the program can handle it? Any recommendations would be helpful.
Thanks
M.K
Posted by Guy Tal on August 2, 2006 at 8:07 AM
The best resolution will be the native resolution of the projector. Most go up to 800x600 and some of the better ones can handle 1024x768.
I would suggest sizing your images so they are not stretched or compressed to fit within the native resolution, which may result in softness or jagged artifacts.
File format should not make a difference as long as the software supports it but you also don't want the files to take too long to load. I suggest using JPG with low compression. Also, most projectors handle sRGB well enough (some of the better ones even have a specific sRGB mode) so I would convert to that profile.

Guy
Posted by Toni Lankerd on August 2, 2006 at 9:18 AM
Our camera club's guidelines calls for a size of 1024x684, Jpeg, at a resolution of 72 dpi, if that helps any.

Posted by Preston Birdwell on August 2, 2006 at 3:14 PM
Mark,

If you are using PowerPoint, JPEG in sRGB will work nicely. TIFF files will also work well, but are larger, so be sure the computer you will be using in conjunction with the projector has plenty of RAM.

Guy's advice about sizing is very important! An improperly sized image that looks OK on a monitor, will look pretty crummy on a projection screen. Also, you might want to make two images: One with a bit higher contrast than the other. If possible, run a test to see which version looks the best on the projection screen, using the ambient light that will be used for the presentation; screens can vary widely in their display of image brightness and contrast.

Let us know how it goes!

-PB