Sizing images for projection

Can anyone tell me what a good combination of dpi and dimensions would be for projecting images?

Generically, the size posting guidelines here will work.

Realistically, you would probably be better off knowing the resolution of the projector and matching your image to that resolution. That will avoid the software and/or projector doing any interpolation for you and you will know exactly what will show up.

I'd also try to project jpegs which have been compressed as much as you can before any artifacts show up. For a video presentation, you want to keep things moving along and a small file size helps a lot. You may need to experiment with the images a bit to see what works. Trust me, there is very little more annoying as a viewer than having to wait for every single image to be processed and reduced by the machine before being projected (except possibly being poorly or even completely uneditted).

Most modern digital projectors allow you to choose a number of sizes and resolutions. Most software (Powerpoint, Keynote) will automatically size your images for you. So what works for your computer monitor, within reasonable size limits, will work for a projector.

I use Keynote on a Mac for my presentations. It has the option of taking care of this for you. It makes transitions almost instantaneous...

Don't forget to figure out what color space the projector might use or be better at accomplishing...(added "accomplishing so as not to end in a prepositional phrase...not my fault...it's my Mother's!

Troup