Driver assistance apparatus and driver assistance method

1. A driver assistance apparatus, comprising:

a camera mounted on a vehicle and configured to have a front field of view of the vehicle and acquire image data; and

a controller comprising a processor configured to process the image data,

wherein the controller is configured to:

determine a pair of boundary lines based on the processing of the image data,

control a steering device of the vehicle so that the vehicle travels within a zone defined by the pair of boundary lines, based on the vehicle being deviated from the zone, and

change the pair of boundary lines to change the zone, based on a driver not holding a steering wheel.

2. The driver assistance apparatus of claim 1 , wherein the controller is configured to output a warning, based on the driver not holding the steering wheel.

3. The driver assistance apparatus of claim 2 , wherein the controller is configured to change the pair of boundary lines to extend the zone to a first zone for a predetermined period of time from a point in time that the warning is output.

4. The driver assistance apparatus of claim 3 , wherein the controller is configured to change the pair of boundary lines to extend the zone to a second zone, after a predetermined period of time has elapsed from a point in time that the zone is extended to the first zone.

5. The driver assistance apparatus of claim 4 , wherein each of the first zone and the second zone is between left and right lines of a lane in which the vehicle travels, and the second zone is wider than the first zone.

6. The driver assistance apparatus of claim 1 , wherein the controller is configured to determine whether the driver holds the steering wheel after extending the zone, and end an autonomous driving mode, based on the driver not holding the steering wheel.

7. The driver assistance apparatus of claim 1 , wherein the controller is configured to determine whether the driver holds the steering wheel after extending the zone, and maintain an autonomous driving mode, based on the driver holding the steering wheel.

8. The driver assistance apparatus of claim 1 , wherein the controller is configured to change the pair of boundary lines so that the vehicle does not cross left and right lines of a lane in which the vehicle travels.

9. The driver assistance apparatus of claim 1 , wherein the controller is configured to calculate the zone defined by the pair of boundary lines, based on at least one of a distance between left and right lines of a lane in which the vehicle travels or location information of the left and right lines.

10. A driver assistance method comprising a camera mounted on a vehicle and configured to have a surrounding field of view of the vehicle, the driver assistance method comprising:

determining a pair of boundary lines based on processing of image data;

controlling a steering device of the vehicle so that the vehicle travels within a zone defined by the pair of boundary lines, based on the vehicle being deviated from the zone; and

changing the pair of boundary lines to change the zone, based on a driver not holding a steering wheel.

11. The driver assistance method of claim 10 , further comprising:

outputting a warning, based on the driver not holding the steering wheel.

12. The driver assistance method of claim 11 , further comprising:

changing the pair of boundary lines to extend the zone to a first zone for a predetermined period of time from a point in time that the warning is output.

13. The driver assistance method of claim 12 , further comprising:

changing the pair of boundary lines to extend the zone to a second zone, after a predetermined period of time has elapsed from a point in time that the zone is extended to the first zone.

14. The driver assistance method of claim 13 , wherein each of the first zone and the second zone is between left and right lines of a lane in which the vehicle travels, and the second zone is wider than the first zone.

15. The driver assistance method of claim 10 , further comprising:

determining whether the driver holds the steering wheel after extending the zone, and ending an autonomous driving mode, based on the driver not holding the steering wheel.

16. The driver assistance method of claim 10 , further comprising:

determining whether the driver holds the steering wheel after extending the zone, and maintaining an autonomous driving mode, based on the driver holding the steering wheel.

17. The driver assistance method of claim 10 , further comprising:

changing the pair of boundary lines so that the vehicle does not cross left and right lines of a lane in which the vehicle travels.

18. The driver assistance method of claim 10 , further comprising:

calculating the zone defined by the pair of boundary lines, based on at least one of a distance between left and right lines of a lane in which the vehicle travels or location information of the left and right lines.

19. A computer-readable recording medium storing a program for implementing a driver assistance method, the method comprising:

acquiring image data by a camera configured to have a surrounding field of view of a vehicle;

processing the image data;

determining a pair of boundary lines based on the processing of the image data;

controlling a steering device of the vehicle so that the vehicle travels within a zone defined by the pair of boundary lines, based on the vehicle being deviated from the zone; and

changing the pair of boundary lines to change the zone, based on a driver not holding a steering wheel.