At this point, there is no way to unlock the phone and have access to the pictures, because a factory reset (the only you need to do) will wipe all the settings, apps and possibly, the media stored on the device. You can visit a local shop, and they will reset the pattern/password from the NAND with the help of a 3rd party hardware box, but it will cost a fee for the procedure.
Warning: You will lose everything if you continue further.
To do a factory reset of the phone, turn it off then press Volume UP + Camera + Power button, and the procedure should start automatically. After the phone will restart, it might take a while until it comes back to initial setup.