Abstract: A method for recording an image using a mobile device, the mobile device including a camera unit, a detection area being assigned to the camera unit, the mobile unit including a projection unit, a projection area being assigned to the projection unit, the detection area and the projection area at least partially overlapping, a piece of image information being projected into the detection area in a first method step, a recording medium of the camera unit being exposed in a second method step, which follows the first method step, the image generated by the exposure of the recording medium being stored in the mobile device in a third method step.

Abstract: A method for determining gestures in the beam region of a projector includes: projecting an image onto a surface with the aid of the projector, using light; measuring a first set of light intensities of light backscattered from the direction of the surface, under the influence of a gesture made in the beam region of the projector; assigning the measured light intensities to, in each instance, a position of the image projected by the projector; at a first time point, generating a first light intensity function over a second set of positions, which are assigned measured light intensities; at a second time point, generating at least one second light intensity function over the second set of positions; and determining the gesture made, based on the result of a comparison between the first and second light intensity functions.

Abstract: A method for determining gestures in the beam region of a projector includes: projecting an image onto a surface with the aid of the projector, using light; measuring a first set of light intensities of light backscattered from the direction of the surface, under the influence of a gesture made in the beam region of the projector; assigning the measured light intensities to, in each instance, a position of the image projected by the projector; at a first time point, generating a first light intensity function over a second set of positions, which are assigned measured light intensities; at a second time point, generating at least one second light intensity function over the second set of positions; and determining the gesture made, based on the result of a comparison between the first and second light intensity functions.