A disclosed method determines a distance from a camera to a face of a vehicle driver using information determined by phase detecting pixels of a digital image sensor of the camera. The method includes capturing an image of the driver including the driver's face and processing the image to determine a face region of the image. The method further includes determining a subset of phase detecting pixels of the digital image sensor that are associated with the face region of the image. A comparison of first and second image data generated by the determined phase detecting pixels is then used to determine a spatial image offset. The spatial image offset is then used to generate a first distance estimate of a distance between a region of the driver's face and the digital image sensor. The first distance estimate may be used to track the driver's head or eyes.
ENHANCED VIDEO-BASED DRIVER MONITORING USING PHASE DETECT SENSORS
2020-07-02
Patent
Elektronische Ressource
Englisch
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