| US 7,519,459 B2 | ||
| Driving assistance system | ||
| Takafumi Ito, Toyota (Japan); Hiroshi Uesugi, Nagoya (Japan); Osamu Katayama, Nagoya (Japan); Takashi Omori, Sapporo (Japan); and Kentaro Mizutani, Sapporo (Japan) | ||
| Assigned to DENSO CORPORATION, Kariya (Japan); and The National University Corporation Hokkaido University, Sapporo-shi (Japan) | ||
| Filed on Mar. 08, 2005, as Appl. No. 11/73,566. | ||
| Claims priority of application No. 2004-077083 (JP), filed on Mar. 17, 2004. | ||
| Prior Publication US 2005/0209749 A1, Sep. 22, 2005 | ||
| Int. Cl. G06F 7/00 (2006.01) | ||
| U.S. Cl. 701—36 [701/1; 340/425.5; 340/438; 340/439; 340/903; 348/148] | 11 Claims |
| 1. A driving assistance system provided in a vehicle that a driver operates, the system comprising:
a detection unit that detects a distribution of a driver's gaze;
an ideal computation unit that computes an ideal probability distribution of a driver's gaze, from the distributions detected
in a past and information, wherein the information is derived from the vehicle and a periphery surrounding the vehicle, the
ideal computation unit including
an imaging unit that obtains image information ahead of the vehicle:
a visual-field-image accumulation unit that accumulates image information corresponding to a driver's visual-field from the
obtained image information and the detected distributions;
a first computation unit that computes a probability distribution of a driver's gaze required for steering operation for traveling
a road after obtaining a shape of the road from the accumulated image information, to thereby output a first result;
a second computation unit that computes a probability distribution of a driver's gaze expected from a visual characteristic
of the accumulated image information, to thereby output a second result; and
an addition unit that adds up the outputted first result and the outputted second result to thereby obtain the ideal gaze
probability distribution;
a risk determination unit that determines presence of a risk when a difference between the detected distribution and the computed
ideal probability distribution exceeds a given threshold; and
an output unit that outputs a result determined by the risk determination unit.
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