Not much, really. Anything that scrapes the disk image should be able to recover the images. There's already a "free" open source application or three. I don't

Not much, really. Anything that scrapes the disk image should be able to recover the images. There's already a "free" open source application or three. I don't work in the field, but I've had some classes with local forensics engineers. Forensics teams buy software almost solely because they are able to reliably cite the software's use in court, and the developers could be subpoenaed easily to explain the function if the defense decided to call its use into question. Open-source solutions likely will never be used for that reason.