| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately detect the line of sight of the subject of detection regardless of whether or not there are eyeglasses. <P>SOLUTION: Based on a control command outputted from an emission control part 31 to control the emission state of an infrared LED 22, an image acquisition part 32 acquires as an illuminated image the image data obtained through the photographing of a line-of-sight sensor 12 during the execution of application of infrared rays by the infrared LED 22, and acquires as an unilluminated image the image data obtained through the photographing of the line-of-sight sensor 12 when application of infrared rays by the infrared LED 22 is not executed. A differential image creating part 33 creates a differential image related to the difference between the illuminated image and the unilluminated image. A line-of-sight calculating part 36 calculates a characteristic quantity while setting as the subject of detection the eyeball of a driver relative to the differential image inputted from the differential image creating part 33, and calculates a line-of-sight vector based on the center position of the iris detected through a recognition process such as shape determination and on the central position of the eyeball calculated from the central position of a Purkinje image, and calculates the position of the target of the line of sight based on the line-of-sight vector. <P>COPYRIGHT: (C)2007,JPO&INPIT |
