One of my speciality quilts is a memory quilt with photos. It's really important to provide a good quality photo for printing on fabric. The color is most important. The colors shouldn't be too dark and should all be roughly the same value. Here are some examples of good quality photos:
The following photos are poor quality because the colors are too dark. It doesn't matter what precautions are taken, photos with a lot of dark colors will bleed.
It's a good idea to provide several alternate photos just in case.