DVD to Photos??

I have been working on a prtoject for my sister, and I need some help. I don’t now if its possible to do, but I want to take her old slide shows that are in dvd format and return them to regular photo images. She has since lost her originals and only has the dvd’s and she wantes to remake the images. I’m not sure how to help her, but if anyone has some advice on if this can be done, I would really be grateful!