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Old Dec 18, 2003, 4:13 PM   #1
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Default X&Y Resolution

Like to think I know what image XResolution and YResolution represent Ė pixels per inch on the axes. Donít these resolutions pertain only to printing (or scanning)? If so, why does my Canon A40 assign a number (always 180) to the parameters?
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Old Dec 19, 2003, 10:25 AM   #2
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You are correct, the 180 is DPI. Its interesting that my 10D assigns 72 (I believe). Much to low to be useful.

It's historical, I believe. 72 is based on TV or video. I don't know why Canon chose 180 for the A40. I would ignore it.

What matters more is the actual resolution.

Eric
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Old Dec 20, 2003, 11:29 AM   #3
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Eric,

Iím one of those people (anal engineer) who struggles to find an answer/reason for everything, but sounds like camera assigned DPI is truly arbitrary, I can live with that.

Thanks for the help
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