Video recording apparatus for vehicle and video recording method for vehicle

Disclosed is a video recording apparatus for a vehicle, which includes a camera unit formed so as to change a capturing direction; a driver's viewing direction detecting unit configured to detect a driver's viewing direction; a control unit configured to control the camera unit so that the detected viewing direction corresponds to the capturing direction; and a storing unit configured to store a video obtained by the camera unit. Therefore, a video in a direction at which the driver views is obtained and stored without mounting a plurality of cameras so that it is possible to obtain a video for a situation of an accident of a vehicle of the driver or a vehicle of another driver occurring not only in the front of the driver's vehicle but also in the side of the driver's vehicle.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit of Korean Patent Application No. 10-2012-0149178 filed in the Korean Intellectual Property Office on Dec. 20, 2012, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a video recording apparatus for a vehicle and a video recording method for a vehicle, and more specifically, to a video device for a vehicle, a video recording apparatus for a vehicle, and a video recording method for a vehicle which obtain and store a video using a camera which is configured to rotate in one or more directions.

BACKGROUND ART

A video device for a vehicle refers to a device which is provided in a vehicle to obtain a video of an exterior of the vehicle or a video of an interior of the vehicle on the front, the side, or the rear of the vehicle. A video recording apparatus for a vehicle refers to a device which stores the video obtained by the video device for a vehicle and maintains the video for a predetermined period of time.

Such a video recording apparatus for a vehicle is generally mounted near a rear view mirror in the vehicle or on a dashboard to obtain and store a video. The video obtained by the video recording apparatus for a vehicle is very useful as an objective evidential material in order to analyze a situation when a vehicle which is parked or stopped is broken down or a car accident occurs. Therefore, in recent years, a case of mounting the video recording apparatus for a vehicle is significantly increased.

In the meantime, for some purposes, it is required to obtain videos which are captured in various directions such as the front, the side, and the rear of the vehicle through the video recording apparatus for a vehicle. In this case, a plurality of cameras needs to be provided in the vehicle in accordance with the capturing directions because the capturing direction is fixed when the camera is mounted.

In recent years, in accordance with the development of an intelligent vehicle, demands for video information obtained in various directions with respect to the vehicle are increased so that the number of cameras which are provided in the vehicle is correspondingly increased. However, if the plurality of cameras is provided so as to correspond to the required capturing direction, the cost is disadvantageously increased.

SUMMARY OF THE INVENTION

The present invention has been made in an effort to provide a video recording apparatus for a vehicle and a video recording method for a vehicle which are capable of adjusting a capturing direction in accordance with a direction at which a driver views during driving.

An exemplary embodiment of the present invention provides a video recording apparatus for a vehicle including: a camera unit formed so as to change a capturing direction; a driver's viewing direction detecting unit configured to detect a driver's viewing direction; a control unit configured to control the camera unit so that the detected viewing direction corresponds to the capturing direction; and a storing unit configured to store a video obtained by the camera unit.

The driver's viewing direction detecting unit may detect the viewing direction using video information on a face direction of the driver.

The driver's viewing direction detecting unit may detect the viewing direction using posture information of the driver.

The camera unit may be configured to be panned and tilted.

Another exemplary embodiment of the present invention provides a video recording method for a vehicle including: recognizing a capturing direction of a camera unit; detecting a viewing direction of a driver; changing the capturing direction of the camera unit so as to match the capturing direction of the camera unit and the viewing direction of the driver; and storing a video obtained by the camera unit.

In the detecting of a viewing direction of a driver, the viewing direction may be detected using video information on a face direction of the driver.

The viewing direction may be detected using posture information of the driver.

According to exemplary embodiments of the present invention, by configuring to adjust a capturing direction of a camera unit in accordance with a viewing direction of a driver, a video in a direction at which the driver views is obtained and stored without mounting a plurality of cameras.

Therefore, it is possible to obtain a video for a situation of an accident of a vehicle of the driver or a vehicle of another driver occurring not only in the front of the driver's vehicle but also in the side of the driver's vehicle.

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to accompanying drawings. First, in the drawings, it should be noted that the same reference numerals denote the same or similar parts even though the parts are illustrated in different drawings. Hereinafter, the exemplary embodiments of the present invention will be described but the technical spirit of the present invention is not limited thereto but the exemplary embodiments may be modified so to be embodied in various manners by those skilled in the art.

The exemplary embodiment of the present invention has a technical feature which controls a camera unit so as to match a driver's viewing direction with a capturing direction of the camera unit.

FIG. 1is a view illustrating a video recording apparatus for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 1, the video recording apparatus100for a vehicle according to the exemplary embodiment of the present invention includes a camera unit110, a driver's viewing direction detecting unit120, a control unit130, and a storing unit140.

First, the camera unit110functions to mainly obtain an external video of the vehicle. The camera unit110may include a camera and a video processing module which processes a video captured by the camera. In this case, the camera may be configured to change a capturing direction or a focal distance. In one exemplary embodiment, the camera unit110may include a PTZ (pan tilt zoom) camera. The PTZ camera refers to a camera which pans in a vertical direction and a horizontal direction and extends a focal distance. In the PTZ camera, an actuator which tilts and swivels the camera and a controller which controls the actuator to be driven may be provided.

In the meantime, the camera unit110may be provided inside the wind shield or on a dashboard of the vehicle. The camera unit110may be additionally provided inside a rear side glass of the vehicle so as to capture the rear of the vehicle, in addition to the front of the vehicle.

The camera unit110may also function as a video device to recognize a lane or obtain road information for autonomous navigation.

Next, the driver's viewing direction detecting unit120will be described.

The driver's viewing direction detecting unit120functions to detect an eyesight direction of the driver. In order to detect a viewing direction of the driver, a face direction and a pupil direction of the driver, and a posture of the driver are detected to determine the viewing direction.

FIG. 2is a view illustrating the driver's viewing direction monitoring unit illustrated inFIG. 1.

In an exemplary embodiment, referring toFIG. 2, the driver's viewing direction detecting unit120may include an additional driver's viewing camera121which obtains video information on the face direction or the pupil direction of the driver. The driver's viewing camera121may be a camera which is provided in the vehicle or a camera which is provided inside or outside a portable terminal device such as a smart phone or a smart pad.

In the meantime, the driver's viewing direction detecting unit120may include a posture sensor122which detects a driving posture. An example of the posture sensor includes a gyro sensor which is attached to glasses or an accessory which is worn on a face or a head of the driver.

The driver's viewing direction detecting unit120may include a driver's viewing direction determining module123which determines the driver's viewing direction. The driver's viewing direction determining module123, first, detects the driver's viewing direction by estimating a pose using a video of a face of the driver obtained from the driver's viewing camera121.

The pose estimation using the face video of the driver using information obtained from the above-mentioned driver's viewing camera121and posture sensor122may be performed by applying a pose estimating method such as ASM (active shape model) or an AAM (active appearance model) to the obtained face video. Here, the ASM refers to a method that finds an object in the image using shape information (feature point extracting) of an object and the AAM refers to a method that finds an object in the image using shape information and texture information of the object, which is an improved ASM method.

Alternatively, the driver's viewing direction determining module123may process the video for the pupil obtained from the driver's viewing camera121to detect the viewing direction of the driver.

In the meantime, the driver's viewing direction determining module123may consider at least two of the face direction, the pupil direction, and the posture information of the driver in combination to more precisely detect the viewing direction of the driver.

Next, the control unit130will be described.

The control unit130adjusts the capturing direction of the camera unit110so as to correspond to the detected viewing direction of the driver.FIG. 3is a view illustrating change of the capturing direction of a camera unit corresponding to the driver's viewing direction andFIG. 4is a view illustrating the change of the capturing direction of the camera unit in the front and the rear of the vehicle corresponding to the driver's viewing direction.

In an exemplary embodiment, the control unit130is connected to a controller of a PTZ camera111to generate a driving signal to operate the actuator of the PTZ camera111so as to match the detected viewing direction of the driver and the capturing direction.

Referring toFIG. 3, when the viewing direction of the driver is directed to the front of the vehicle1, the capturing direction of the PTZ camera111may be represented by “F” ofFIG. 3. For example, when the viewing direction of the driver is shifted to the right while driving, the control unit130may control the camera unit110so that the capturing direction of the PTZ camera111is represented by “F′” ofFIG. 3.

In the meantime, referring toFIG. 4, the PTZ cameras111may be provided in the front side and the rear side of the vehicle1. For example, if the viewing direction of the driver is changed to the right side while driving, the control unit130controls the camera unit110so that the capturing directions of two PTZ cameras111which are provided at the front side and the rear side of the vehicle1are represented by “F′” ofFIG. 3. The driver may store not only a video for an accident occurring in the front of the vehicle1but also a video for an accident situation occurring in the side or the rear of the vehicle1through the two PTZ cameras111which are provided at the front side and the rear side of the vehicle1.

The control unit130stores only the video of the front of the vehicle1through the PTZ camera111provided in the front side of the vehicle1in a normal status. If a driver's chooses to rotate or change a lane is detected, the control unit130controls the camera unit110to operate the PTZ camera111provided at the rear side of the vehicle1to store a video of the rear of the vehicle1together with the video of the front through the driver's viewing direction detecting unit120. When parking the vehicle, the control unit130controls the camera unit110to operate only the PTZ camera111provided at the rear side of the vehicle1to store only a video of the rear of the vehicle1.

The control unit130is connected to a vehicle speed sensor to control the capturing direction of the PTZ camera111to be changed in accordance with the viewing direction of the driver only at a predetermined vehicle speed or higher.

When the viewing direction of the driver exceeds a predetermined threshold value or the viewing direction of the driver cannot be specified through the driver's viewing direction detecting unit120, the control unit130may initialize the camera unit110so as to direct the capturing direction of the PTZ camera111to the front of the vehicle1.

In the above description, even though it is described that the PTZ camera111is provided in the front side or the rear side of the vehicle1, the present invention is not limited thereto and the PTZ camera111may be additionally provided at the side of the vehicle1.

Next, the storing unit140stores the video obtained by the camera unit110.

FIG. 5is a flowchart illustrating a video recording method for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 5, in step S100, the video recording apparatus100for a vehicle according to an exemplary embodiment of the present invention recognizes a capturing direction of the camera unit100.

Next, in step S200, the video recording apparatus100for a vehicle detects a viewing direction of the driver. In this case, the video recording apparatus100for a vehicle may detect the viewing direction using video information on a face direction of the driver. The video recording apparatus100for a vehicle may detect the viewing direction using posture information of the driver.

Next, in step S300, the video recording apparatus100for a vehicle changes the capturing direction of the camera unit110so as to match the capturing direction of the camera unit110and the viewing direction of the driver.

Next, in step S400, the video recording apparatus100for a vehicle stores the video obtained by the camera unit110.