Recovering deleted photos on internal memory I read the tag wiki and about 10 pages deep of questions tagged data-recovery, but it only depressed me.

I deleted a folder of photos off of my phone by accident and need to retrieve them. I haven't done anything on the phone that could potentially overwrite the internal memory where the photos were stored, except for downloading and trying an app recovery tool ("photo recovery"), which of course didn't work. 

The phone is an HTC Desire 510 running 4.4.2 (unrooted). My computer is running Ubuntu GNOME 14.04

From what I could find googling, PhotoRec seems to be a good free option. Unfortunately, PhotoRec is not detecting my phone. Apparently it's due to the MTP protocol. I cannot find any way to opt for USB mass storage.

What should I do? I cannot find a single helpful resource online and the longer I wait the worse my chances are (in my mind at least). 

I found one thing that gives me hope: https://github.com/IzzySoft/Adebar. Does anyone know if this could be what I need?
The only way to recover your photos is that you will need to root your phone. There is really no other way to restore the data you already deleted. First you will need to root your device and then you can recover your files. Rooting your device will void your warranty. Next time before you accidentally delete your photos, use an online backup tool like Google Plus/Photos, dropbox etc. 

This app will restore the photos for you: DiskDigger [ROOT].

Hope my answer helps