That's probably where you should start. Take pictures in a bright environment, like e.g. outdoors, but try to avoid lens glare and e.g. the sun shining from any of the metal parts, and if you have trouble keeping the camera steady, use e.g. a cardboard box or something to support your hands so as to avoid blurry pictures. Try to cover every single portion of the PCB and take multiple pictures of slightly different angles if needed.