Apparatus and method for determining state

1. An apparatus for accurately determining a state of a driver, comprising a processor and a memory storing computer executable instructions that are executable by the processor to,

when a vehicle driven by a driver is on a straight road section, set a predetermined area as an area in which looking directions or face orientations of a driver indicate the driver is in a state of careless driving;

if a road condition around the vehicle changes, enlarge the predetermined area based on the changed road condition;

automatically sense looking directions or face orientations of the driver of the vehicle with camera images received from a driver monitoring camera,

automatically determine a movement area in which movement values indicating the looking directions or face orientations of the driver of the vehicle are distributed is included in the enlarged predetermined area, and

if the movement area is within the enlarged predetermined area, automatically determine that the diver is in a state of careless driving, and if the movement area is outside the enlarged predetermined area, automatically determine that the driver is not in a state of careless driving.

2. The apparatus according to claim 1 , wherein the memory further stores computer executable instructions that are executable by the processor to enlarge, in accordance with the road condition that there is a curve ahead of the vehicle, the predetermined area toward the curve.

3. The apparatus according to claim 2 , wherein the memory further stores computer executable instructions that are executable by the processor to enlarge the predetermined area to a larger extent as the radius of curvature of the curve decreases.

4. The apparatus according to claim 1 , wherein the memory further stores computer executable instructions that are executable by the processor to enlarge, in accordance with the road condition that the inclination of a road changes ahead of the vehicle, the predetermined area toward a side on which the inclination changes.

5. The apparatus according to claim 1 , wherein the memory further stores computer executable instructions that are executable by the processor to enlarge, in accordance with the road condition that an object will be detected ahead of the vehicle, the predetermined area in a direction from the position of the driver to a position where the object will be detected.

6. The apparatus according to claim 1 , wherein the memory further stores computer executable instructions that are executable by the processor to enlarge the predetermined area to a larger extent as the speed of the vehicle increases.

7. A method for determining a state, comprising,

setting a predetermined area as an area in which looking directions or face orientations of a driver of a vehicle indicate the driver is in a state of careless driving when the vehicle is driven on a straight road section;

enlarging the predetermined area if a road condition around the vehicle changes the enlargement based the changed road condition;

obtaining images of a driver with a driver monitoring camera;

automatically analyzing the obtained images of the driver with a processor according to stored executable program instructions, and if a movement area in which movement values indicating looking directions or face orientations of a driver of a vehicle are distributed is included in the enlarged predetermined area, automatically determining that the driver is in a state of careless driving, and if the movement area is not included in the enlarged predetermined area, automatically determining that the driver is not in a state of careless driving.