Distracted driving determination apparatus, distracted driving determination method, and recording medium having program for distracted driving determination
A driver performing a lane check by looking back for safe driving can be alerted based on the driver's gaze deviating from a view area for usual driving. A distracted driving determination apparatus, a distracted driving determination method, and a program for distracted driving determination recorded on a recording medium compare a change pattern detected from changes in the gaze or face orientation of the driver with a predetermined reference pattern, and change a usual determination condition for detecting distracted driving to a temporary determination condition when the change pattern matches the reference pattern. This prevents the line check from being determined to be distracted driving.
1. A distracted driving determination apparatus, comprising a processor configured with a program to perform operations comprising operations as:
a first obtaining unit configured to obtain first detection information indicating a change pattern of a gaze or a face orientation of a driver;
a change pattern determiner configured to read the change pattern obtained by the first obtaining unit and determine whether the change pattern matches a reference pattern predetermined in accordance with a lane check by the driver;
a condition changer configured to change a usual determination condition for detecting distracted driving and set a temporary determination condition when the change pattern is determined to match the reference pattern;
a distracted driving determiner configured to determine distracted driving based on the first detection information using the usual determination condition or the temporary determination condition set by the condition changer; and
an alert instruction unit configured to output an instruction signal to generate an alert when the distracted driving determiner detects distracted driving.
2. The distracted driving determination apparatus according to claim 1 , wherein
the change pattern determiner defines an imaginary lane check area at least rightward or leftward from a vehicle, and
the change pattern determiner determines that the change pattern of the gaze or the face orientation of the driver matches the reference pattern associated with a lane check by the driver when the gaze or the face orientation of the driver indicated by the first detection information changes by at least an angle of the lane check area and also the gaze or the face orientation is redirected to an original position within a predetermined first duration after starting to change from the original position.
3. The distracted driving determination apparatus according to claim 2 , further comprising:
a second obtaining unit configured to obtain second detection information indicating an operation of a direction indicator,
wherein the condition changer changes the determination condition for detecting distracted driving and set the temporary determination condition during the operation of the direction indicator indicated by the second detection information irrespective of a determination result from the change pattern determiner.
4. The distracted driving determination apparatus according to claim 2 , further comprising:
a second obtaining unit configured to obtain second detection information indicating an operation of a steering unit for changing a traveling direction of the vehicle,
wherein the condition changer changes the determination condition for detecting distracted driving and set the temporary determination condition during the operation of the steering unit for changing the traveling direction of the vehicle indicated by the second detection information irrespective of a determination result from the change pattern determiner.
5. The distracted driving determination apparatus according to claim 1 , wherein
the change pattern determiner defines an imaginary first lane check area at a position of a side mirror at least rightward or leftward from a vehicle, and an imaginary second lane check area rearward from the first lane check area for the driver to directly check a lane, and
the change pattern determiner determines that the change pattern of the gaze or the face orientation of the driver matches the reference pattern associated with a lane check by the driver when the gaze or the face orientation indicated by the first detection information starts changing and is retained in the first lane check area, changes by at least an angle of the second lane check area, and also the gaze or the face orientation is redirected to an original position within a predetermined second duration after starting to change from the original position.
6. The distracted driving determination apparatus according to claim 5 , further comprising:
a second obtaining unit configured to obtain second detection information indicating an operation of a direction indicator,
wherein the condition changer changes the determination condition for detecting distracted driving and set the temporary determination condition during the operation of the direction indicator indicated by the second detection information irrespective of a determination result from the change pattern determiner.
7. The distracted driving determination apparatus according to claim 5 , further comprising:
a second obtaining unit configured to obtain second detection information indicating an operation of a steering unit for changing a traveling direction of the vehicle,
wherein the condition changer changes the determination condition for detecting distracted driving and set the temporary determination condition during the operation of the steering unit for changing the traveling direction of the vehicle indicated by the second detection information irrespective of a determination result from the change pattern determiner.
8. The distracted driving determination apparatus according to claim 1 , further comprising:
a second obtaining unit configured to obtain second detection information indicating an operation of a direction indicator,
wherein the condition changer changes the determination condition for detecting distracted driving and set the temporary determination condition during the operation of the direction indicator indicated by the second detection information irrespective of a determination result from the change pattern determiner.
9. The distracted driving determination apparatus according to claim 1 , further comprising:
a second obtaining unit configured to obtain second detection information indicating an operation of a steering unit for changing a traveling direction of a vehicle,
wherein the condition changer changes the determination condition for detecting distracted driving and set the temporary determination condition during the operation of the steering unit for changing the traveling direction of the vehicle indicated by the second detection information irrespective of a determination result from the change pattern determiner.
10. A distracted driving determination method implemented by an in-vehicle apparatus, the method comprising:
obtaining first detection information indicating a gaze or a face orientation of a driver;
detecting a change pattern of the gaze or the face orientation of the driver based on the first detection information, and determining whether the change pattern matches a reference pattern predetermined in accordance with a lane check by the driver;
changing a determination condition for detecting distracted driving and setting a temporary determination condition when the change pattern is determined to match the reference pattern;
determining whether the driver is engaging in distracted driving based on the gaze or the face orientation of the driver indicated by the first detection information using the determination condition for detecting distracted driving or the set temporary determination condition; and
outputting an instruction signal to generate an alert when the distracted driving determiner detects distracted driving.
11. A non-transitory recording medium having a program recorded thereon causing a hardware processor included in the distracted driving determination apparatus according to claim 1 to function as the units included in the distracted driving determination apparatus.