# US 10,769,460 B2 · Driver condition detection system

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- Number: US 10,769,460 B2
- Document ID: US10769460B2
- Status: Granted
- Kind: B2
- Application number: 15/891,455
- Filed: 2018-02-08
- Published: 2018-08-09
- Granted: 2020-09-08
- Earliest claimed: 2017-02-08
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Takeshi Matsumura
- Web page: https://patentgrep.com/patent/US10769460B2

## CPC

- G06V 20/597: {Recognising the driver's state or behaviour, e.g. attention or drowsiness}
- B60W 40/08: related to drivers or passengers
- G06V 40/171: {Local features and components; Facial parts (eye characteristics G06V40/18); Occluding parts, e.g. glasses; Geometrical relationships}
- G06V 40/172: {Classification, e.g. identification}
- H01J 49/0086: {Accelerator mass spectrometers}
- H01J 49/403: {characterised by the acceleration optics and/or the extraction fields}
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

The driver condition detection system includes a driver monitor camera capturing a face of a driver of a vehicle and generating a facial image of the driver, and a driver condition detection part configured to detect a condition of the driver based on the facial image. If a part of face parts of the driver is hidden in the facial image, the driver condition detection part is configured to detect a condition of the driver based on face parts of the driver not hidden in the facial image. The face parts of the driver are a mouth, nose, right eye, and left eye of the driver.

## Claims

### Claim 1

A driver condition detection system comprising:
a driver monitor camera capturing a face of a driver of a vehicle and generating a facial image of the driver, and
a driver condition detection part configured to detect a condition of the driver based on the facial image, wherein
when a part of face parts of the driver is hidden in the facial image, the driver condition detection part is configured to detect a condition of the driver based on each of face parts of the driver not hidden in the facial image, the face parts of the driver being a mouth, nose, right eye, and left eye of the driver,
the condition of the driver is a facial direction of the driver,
when a part of the face parts of the driver is hidden in the facial image, the driver condition detection part is configured to detect the facial direction of the driver based on the face parts of the driver not hidden in the facial image and the facial image before a part of the face parts of the driver is hidden, and
the driver condition detection part is configured to judge that the facial direction of the driver has not changed from before a part of the face parts of the driver was hidden when an amount of change of a condition of the face parts of the driver not hidden in the facial image is a threshold value or less, and not detect the facial direction of the driver when the amount of change is larger than the threshold value.

### Claim 2 (depends on 1)

The driver condition detection system according to claim 1, wherein the driver condition detection part is configured to perform matching of the facial image and facial shape data to detect the facial direction of the driver.

### Claim 3 (depends on 2)

The driver condition detection system according to claim 2, wherein the driver condition detection part is configured to perform matching of face parts in the facial image and face parts in the facial shape data to detect the facial direction of the driver.

### Claim 4 (depends on 3)

The driver condition detection system according to claim 3, wherein the driver condition detection part is configured not to perform matching of the face parts of the driver hidden in the facial image and face parts in the facial shape data when a part of the face parts of the driver is hidden in the facial image.