IMG::Crush is a function that takes your files and input settings and reduces an image to the maximum. Only PNG and JPG are accepted at this time. Up to 5 images may be processed at one time.

Lossless :

Your image is stripped of all meta-data and any info that does not pertain to the image. There is absolutely zero quality loss. Useful for images that already have some compression or that need to be pristine.

Minimal :

Image is stripped of all unneeded meta-data, and just enough compression is added to have a minimal to no visible quality loss. Particularly useful for web graphics and images.

Crush It :

Stripped of all meta-data and compressed as much as possibly without looking like crap. Most effective on images (ie. photos, especially large ones), where it saves A TON of space and bandwidth.