It is disclosed a method for providing user commands to an electronic processor, wherein a first command corresponds to the pressure of a first predetermined button of a mouse and a second command corresponds to the release of the button. An image detection device in communication with the electronic processor is able to detect a sequence of images of a person using the electronic processor. The method comprises the following steps: A) identifying a hand of the person; B) detecting movement of the hand corresponding to pinching of the pad of the thumb and of the pad of another finger; C) generating the first user command and sending it to the electronic processor; D) detecting movement of the hand corresponding to spreading of the pad of the thumb and of the pad of the other finger; E) generating the second user command and sending it to the electronic processor.