Scanned slide resolution for Powerpoint?

[Guest]

I have a question regarding scanning 35mm slides for Powerpoint. I'm
scanning some slides for a PP presentation and am unsure of what resolution
to scan them at. The resolution of my notebook monitor & LCD projector is
1024 X 768 pixels. Should the slides be scanned at the same resolution (1024
X 768 ppi)? If this is the case, would I also still have to set the scanner
to scan at 72 ppi or higher? I'm new to this and appreciate any help.
Thanks in advance!

V.B.

 

[Steve Rindsberg]

I have a question regarding scanning 35mm slides for Powerpoint. I'm
scanning some slides for a PP presentation and am unsure of what resolution
to scan them at. The resolution of my notebook monitor & LCD projector is
1024 X 768 pixels. Should the slides be scanned at the same resolution (1024
X 768 ppi)?

Not 1024x768 ppi ... 1024x768 *pixels*.

Or probably better, scan at somewhat higher resolution then batch downsample
them to 1024x768 using image editing software.

You'll probably need to crop them as well, since your screen size and slide
sizes don't match.

If this is the case, would I also still have to set the scanner
to scan at 72 ppi or higher? I'm new to this and appreciate any help.

Ignore ppi/dpi settings. It will only confuse the uninitiated and annoy the
know-it-alls. ;-)

 

[TAJ Simmons]

if this is the case, would I also still have to set the scanner

to scan at 72 ppi or higher?

If a 35mm slide was 1 inch tall..... and you set the scanner to 72ppi, that
would result in 72 pixels per inch, so you would end up with a scan of only
72 pixels tall.

If a 35mm slide was 1 inch tall..... and you set the scanner to 300ppi, that
would result in 300 pixels per inch, so you would end up with a scan of 300
pixels tall.

If a 35mm slide was 1 inch tall..... and you set the scanner to 600ppi, that
would result in 300 pixels per inch, so you would end up with a scan of 600
pixels tall, which is closer to what you need.

Before I'd scan a whole batch of slides.... i'd do some tests with
brightness/contrast/gamma etc

Cheers
TAJ Simmons
microsoft powerpoint mvp

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