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Pay no attention to that (module) behind the curtain.
If you're going to be using images in your content types, then most likely you'll need this module. I'm not talking about "need" in the wow-I-really-need-to-sing-a-dozen-songs-during-my-journey way, but in the wow-I-really-need-to-kill-the-Wicked-Witch-before-she-does-away-with-me-and-my-little-dog way. It is a requirement to complete the odyssey.
No need to be like the Cowardly Lion when you see the "API" in its name, there's nothing scary about this module. You just download and enable it and you're good to go.
Don't worry about being the Scarecrow and not having enough brains to set up and configure ImageAPI - there's no configuration settings or any user interface whatsoever.
So have a heart (like the Tin Woodsman [I always thought he was called the "Tin Man" - who knew?] eventually does) and next time you need image capabilites in your Drupal site that require this module, give thanks to all those that have developed and maintained it.
Once you are taking advantage of it, you'll be on your way to The Emerald City of Drupal development!
The ImageAPI module provides important behind-the-scenes image processing capabilities that are utilized by other image modules, especially ImageCache and ImageField.
"API" is an abbreviation for "Application Programming Interface" - a set of functions that other modules can take advantage of in an effort to reduce code duplication and to provide a standard way to deal with images in Drupal.
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