Abstract: A system for comparing a head position of a passenger of a motor vehicle, determined with the aid of a determination unit, with a reference measurement. The system includes at least one marking element which has at least one marking and is able to be fastened to the head of the passenger, and at least one movement detection element for detecting the position of the at least one marking of the marking element for the reference measurement.

Abstract: A method for calibrating a vehicle camera of a vehicle includes at least one task of reading in and one task of setting. In the reading in, at least one first camera image and one second camera image are read in, which represent images recorded by at least the vehicle camera during a camera movement of the vehicle camera at a standstill of the vehicle. In the setting, a calibration parameter for calibrating at least the vehicle camera is set, using the first camera image and the second camera image.

Abstract: A system for comparing a head position of a passenger of a motor vehicle, determined with the aid of a determination unit, with a reference measurement. The system includes at least one marking element which has at least one marking and is able to be fastened to the head of the passenger, and at least one movement detection element for detecting the position of the at least one marking of the marking element for the reference measurement.

Abstract: A method for calibrating a vehicle camera of a vehicle includes at least one task of reading in and one task of setting. In the reading in, at least one first camera image and one second camera image are read in, which represent images recorded by at least the vehicle camera during a camera movement of the vehicle camera at a standstill of the vehicle. In the setting, a calibration parameter for calibrating at least the vehicle camera is set, using the first camera image and the second camera image.

Abstract: In a method for ascertaining the heart rate of the driver of a vehicle, the eye position is determined with the aid of a camera, and an image section of the driver's head is acquired. To ascertain the heart rate, successive images which were recorded over time with the aid of the camera are analyzed.

Abstract: A method for recognizing a voice context for a voice control function in a vehicle. The method encompasses reading in a gaze direction datum regarding a current gaze direction of an occupant of the vehicle; allocating the gaze direction datum to a viewing zone in an interior of the vehicle in order to obtain a viewing zone datum regarding a viewing zone currently being viewed by the occupant; and determining, by utilization of the viewing zone datum, a voice context datum regarding a predetermined voice context allocated to the viewing zone currently being viewed.

Abstract: A method for recognizing a voice context for a voice control function in a vehicle. The method encompasses reading in a gaze direction datum regarding a current gaze direction of an occupant of the vehicle; allocating the gaze direction datum to a viewing zone in an interior of the vehicle in order to obtain a viewing zone datum regarding a viewing zone currently being viewed by the occupant; and determining, by utilization of the viewing zone datum, a voice context datum regarding a predetermined voice context allocated to the viewing zone currently being viewed.

Abstract: In a method for detecting the face of a driver of a motor vehicle having a camera, in order to ensure that an unfavorable posture of the driver or an unfavorable position of the steering wheel or of the driver's seat of the motor vehicle does not prevent recognition of the face using the camera, provision is made that a positioning signal for the steering wheel, for the driver's seat, or for a pedal is generated if the face is not detectable in the image data.

Abstract: In a method for ascertaining the heart rate of the driver of a vehicle, the eye position is determined with the aid of a camera, and an image section of the driver's head is acquired. To ascertain the heart rate, successive images which were recorded over time with the aid of the camera are analyzed.

Abstract: An optical reproduction and detection system in a vehicle includes a surroundings recording device, a representation device as well as a view detection device. The representation of the recorded vehicle surroundings takes place as a function of the detected direction of view of the driver.

Abstract: A detection system in a vehicle for detecting the speaking activity of a vehicle occupant includes: a video recording system for recording the posture of the head and/or of the motions of the lips; an evaluation device; and a signal generating device.