Abstract: Image processing or image analysis to produce real time effects on images on a screen. The user shoots an imaginary gun, points a wooden stick, points his finger that has a colored paper attached etc, at the screen and effects happen to the images on the screen. The effects could be bullet holes, arrows, clothes, a raw egg, dripping blood, band-aids, etc. The effects move with the image on the screen as if the effect was really physically on the body. When the image leaves the screen temporarily and returns, the effect could still be in place on the image and move with the image. The identifying camera could be on the gun, stick and the like facing the images on the screen or the identifying camera could be on the screen of the TV, computer and the like facing the user with his stick or colored finger.