@captainfunk unless those pictures were really important to you, none that are worth the hassle.
In fact I am not sure how to go about it with a phone.
On a laptop I would make an image of the partition I am trying to recover the photos from, and then work on that image with one of the linux file recovery tools that are available online. But I would not really know how to get a phone partition imaged.
You see, the thing is, the longer you use your device, the bigger the chances are that those deleted files have already been overwritten by new data, which makes it harder, and eventually impossible to recover what has been lost.