1. A method to assist a visually challenged or blind person with aiming at a shooting target, comprising: providing the shooting weapon to be used by the person with a camera placed on the weapon to capture images of the target to be aimed at, identifying the target by shape recognition in the images captured by the camera, emitting a signal to be perceived by the person to guide the person in orienting the shooting weapon towards the target wherein the target displays at least one shape which forms a circle, disk, or ring, and wherein the shape recognition comprises a Hough transformation to identify said shape in the captured images.