If you perform a hard reset of your device, first it's advised to backup important data. However, you can use a PC to recover your deleted pictures. In this case, search Software Informer's database to find a program for this job. I suggest you take a look at Recuva.
To recover your photos, connect the Android device to the PC. When the device pops up the message for Data Storage, select yes. By doing this, even its internal memory is available in My Computer. Select this using the recovery program and start the recovery process.