Sources for digitized images
Digital Cameras capture 1.0 to 10 Mega Pixels. You’re the photographer
Scanners have a wide range of resolution depending on quality 72-1200 ppi is typical.
Drum scanners capture up to 64,000 ppi
Images copied off the web are at a very low resolution of 72 ppi
You can purchase digitized images from Photo sites like Corbis.com
Resolution typically tops out at 300 ppi
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