DiskDigger can undelete and recover lost photos and images from your memory card or internal memory. No rooting necessary!* Whether you accidentally deleted a photo, or even reformatted your memory card, DiskDigger's powerful data recovery features can find your lost pictures and let you restore them. You can upload your recovered files directly to Google Drive, Dropbox, or send them via email. The app also allows you to save the files to a different local folder on your device.
* If your device is not rooted, the app will perform a "limited" scan for your deleted photos by searching your cache and thumbnails.
* If your device is rooted, the app will search all of your device's memory for any trace of photos, as well as videos!
For complete instructions, please see http://diskdigger.org/android
If you need to recover more types of files besides photos and videos, try DiskDigger Pro!