Driving state determination device, determination device, and driving state determination method
AssigneeMitsubishi Electric Corporation
InventorsHisashi Sugawara, Ryosuke Torama, Yudai Nakamura
Life of this patent
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Abstract
There are included: a frequency distribution creating unit for referring to the face information detected by the face information detecting unit, and when a preset change occurs in the driver's face, creating a frequency distribution of face information in a preset time section from the face information detected by a face information detecting unit; a mode value calculating unit for calculating a mode value of the face information from the frequency distribution created; and a reference value calculating unit for calculating a reference value indicating a steady state of the driver from the mode value of the face information.
Claims19
A driving state determination device comprising:
- a processor;
- and
- a memory storing instructions which, when executed by the processor, causes the processor to perform processes of:
- detecting, from a face image of a driver, position information about feature points of the driver's face as face feature points;
- detecting face information indicating a state of the driver's face from the detected face feature points;
- referring to the detected face information, and, creating a frequency distribution of the face information in a preset time section from the detected face information;
- calculating a mode value of the face information from the created frequency distribution;
- calculating a reference value indicating a steady state of the driver from the mode value of the calculated face information;
- and
- determining a driving state of the driver by comparing the calculated reference value with the detected face information.
A determination device comprising:
- a processor;
- and
- a memory storing instructions which, when executed by the processor, causes the processor to perform processes of:
- detecting, from a face image of a driver, position information about feature points of the driver's face as face feature points;
- detecting face information indicating a state of the driver's face from the detected face feature points;
- referring to the detected face information and creating a frequency distribution of the face information in a preset time section from the detected face information;
- calculating a mode value of the face information from the created frequency distribution;
- calculating a reference value indicating a steady state of the driver from the mode value of the calculated face information;
- storing the calculated reference value in association with identification information of the driver;
- and
- performing authentication of the driver by collating the acquired face information with the stored reference value.
A driving state determination method comprising:
- detecting position information about feature points of a driver's face as face feature points from a face image of the driver;
- detecting face information indicating a state of the driver's face from the face feature points;
- referring to the face information, and when a preset change occurs in the driver's face, creating a frequency distribution of the face information in a preset time section from the face information;
- calculating a mode value of the face information from the frequency distribution;
- calculating a reference value indicating a steady state of the driver from the mode value of the face information;
- and
- determining a driving state of the driver by comparing the reference value with the face information.
Dependencies are inferred from the claim text.