Method for obtaining at least one
control signal intended for setting an operating parameter by operating at least one selectable object (103) located in an object area (105) from a recognition and evaluation of an operating gesture of a hand (101) of a user, wherein in the operating gesture a directional axis (104) of a selected finger (102) of the hand (101) is directed towards a selected one of the at least one object (103) and at least predominantly at the same time a rotation (115; 116) of the hand (101) is carried out; for selecting the object (103) comprising the method steps - taking at least one image of the hand (101) when performing the operating gesture in a recognition area (111), - recognizing the selected finger (102) in at least one image of the hand (101), - Detecting the direction axis (104) of the selected finger (102), - Calculating an intersection area of the direction axis (104) with the object area (105) and - Determining the object (103) closest to this intersection area; for operating the object (103) comprising the further method steps - recognizing at least three fingertips (117, 118, 119, 120, 121) in at least one image of the hand (101), - determining the positions of at least three fingertips (117, 118, 119, 120, 121) on an
image plane (112), - calculating a best-fit line (125) from the positions of at least three fingertips (117, 118, 119, 120, 121) on the imaging plane (112), - determining an inclination of the best-fit line (125) relative to a reference direction on the imaging plane (112), - determining an initial position (122) of the regression line (125), - Selecting the initial position (122) of the regression line (125) as the
reference line (123), - determining the inclination of the
reference line (123) relative to the reference direction on the imaging plane (112), - determining the amount and direction of an angle forming a relative rotation (124) between the regression line (125) and the
reference line (123), and - Formation of the
control signal from the amount and direction of the relative rotation.