Decreasing Image Size with Minimal Quality Loss? I have a few scanned in images of some some pages that I need to digitise. They're each roughly around 5.1MB with 600 DPI, but I can't really afford to have scans so large because I only have around 16GB to last for another 7 months. 

I want to decrease the image size but I need to have minimal quality loss of the image. Can this be done?
Just use Preview, and select Adjust Size from the Tools menu.