I found a website that lets you download old (copyright-free) books as images. However, the images have the extension .jp2, something I've never seen before. I finally figured out that I can open them in Illustrator, then reduce them in size (anywhere from 30%-80%) and save them as Illustrator files, which I can then open in Photoshop. In Photoshop, I can then save them as Photoshop files, which I can then import into Aperture, the program I'm currently using to manage my images.
The only problem is that it's a long, tedious process. I have hundreds of images to process, and there are too many steps to go through. Is there a way to speed up the process - like automatically reducing all the images in size or automatically converting them to Photoshop or some other format?
I'm really not sure what extension is best for storing them in Aperture. I'd prefer something small in file size, but the important thing is that I'm simply able to retrieve them, open them and work with them in Photoshop (possibly Illustrator, though I've never really learned how to use that program).