Safety-drive assistance device
First Claim
1. A safety-drive assistance device for assisting a driver in driving a vehicle under a traffic environment, said vehicle having a first camera for taking an image of an outside of said vehicle, and a second camera for taking an image of an inside of said vehicle, comprising:
- a traffic environment detecting unit operable to detect a watched target in said traffic environment from said image taken by said first camera;
a visual-line direction detecting unit operable to detect a direction of a visual line of said driver on the basis of said image of two eyes or one eye of said driver taken by said second camera; and
a visual recognition judging unit for making a judgment whether said driver visually recognizes said watched target or not,whereinsaid visual recognition judging unit is;
operable to calculate a first vector of a moving pattern, during a predetermined period, regarding said watched target mapped on a two dimensional space intersected by a line between the position of an eye of said driver and said watched target;
operable to calculate a second vector of a moving pattern, during said predetermined period, of an intersection point of said two dimensional space with said visual line of said driver detected by said visual-line direction detecting unit; and
operable to make said judgment based on an inner product of said first vector with said second vector and a magnitude of said first vector.
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Accused Products
Abstract
The present invention is to provide a safety-drive assistance device that can judge whether a driver recognizes an object to which a driver should pay an attention or not even if an accuracy of detecting a visual-line direction is almost equal to once degree. A traffic environment detecting unit 11 detects an object such as an automobile, a pedestrian, a road mark and a traffic signal. A watched target judging unit 12 judges a watched target among the objects, to which a driver pays attention. A visual-line direction detecting unit 13 detects a visual-line direction of a driver. A visual recognition judging unit 14 judges whether a driver visually recognizes the watched target or not, based on the watched target and a fluctuation pattern of a direction of either or both eyes of the driver. A non-safety recognition judging unit 15 judges whether a driver recognizes non-safety or not, based on the result of visual recognition judged by the visual recognition judging unit 14. A presentation unit 16 informs the content of non safety, based on the result of judging on safety judged by the non-safety recognition judging unit 15.
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Citations
6 Claims
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1. A safety-drive assistance device for assisting a driver in driving a vehicle under a traffic environment, said vehicle having a first camera for taking an image of an outside of said vehicle, and a second camera for taking an image of an inside of said vehicle, comprising:
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a traffic environment detecting unit operable to detect a watched target in said traffic environment from said image taken by said first camera; a visual-line direction detecting unit operable to detect a direction of a visual line of said driver on the basis of said image of two eyes or one eye of said driver taken by said second camera; and a visual recognition judging unit for making a judgment whether said driver visually recognizes said watched target or not, wherein said visual recognition judging unit is; operable to calculate a first vector of a moving pattern, during a predetermined period, regarding said watched target mapped on a two dimensional space intersected by a line between the position of an eye of said driver and said watched target; operable to calculate a second vector of a moving pattern, during said predetermined period, of an intersection point of said two dimensional space with said visual line of said driver detected by said visual-line direction detecting unit; and operable to make said judgment based on an inner product of said first vector with said second vector and a magnitude of said first vector. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification