Myths about using digital images:
"There is no name or copyright info with this image, so I can copy and use it."
"I got it from the Internet, so it is in the Public Domain."
If you are downloading an image form a museum's website or any individual/institution's website, make sure to check their terms and conditions for image use. If you don't find one, contact the author of the website to ask about your intended use of the image.
The next step after you find an image will vary depending on the license of the image. Here are common categories of image licenses, and what you can do:
Consider assigning Creative Commons licenses to your own work. Use this simple tool Choose a License to set a license.
When scanning images from a printed publication, the best practice today is to save TIFF as master files, then compress to JPEG for your digital presentations. The Library of Congress has the practice of scanning pictorical works at 300 ppi and 24 bit color at the minimum. The standard practice today for JPEG images is to resize them to 1024 x 768 pixels at 72 dpi for a full screen view.
To learn more about scanning, the below are two great resources:
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