State determination device, eye closure determination device, state determination method, and storage medium

A state determination device comprising:

• a processor;
• and
• a memory that stores instructions and that when executed by the processor, causes the processor to perform operations comprising:
• receiving a first eye region image captured at a predetermined first time point in a time interval from when a person opening their eyes closes the eyes to when the person opens the eyes a next time and a second eye region image captured at a predetermined second time point which is later than the first time point in the time interval and calculates a luminance value relating to a plurality of pixels included in each of the first eye region image and the second eye region image,
• wherein if a difference between the luminance value relating to the pixels in the first eye region image and the luminance value relating to the pixels in the second eye region image is equal to or smaller than a predetermined value, it is determined that the person is in a first state, and if the difference is greater than the predetermined value, it is determined that the person is in a second state which differs from the first state.

A method for determining a state, comprising:

• receiving a plurality of eye region images captured at different timings in a time interval from when a person opening their eyes closes the eyes to when the person opens the eyes a next time and calculating a luminance value relating to a plurality of pixels included in each of the eye region images;
• and
• calculating a time interval from a first time point when the luminance value relating to the pixels reaches a predetermined first luminance value for the first time to a second time point when the luminance value relating to the pixels reaches a second luminance value after the first time point, wherein if a time interval from the first time point to the second time point is a first time interval, determining that the person is in a first state, and if the time interval from the first time point to the second time point is a second time interval which is shorter than the first time interval, determining that the person is in a second state which differs from the first state;
• and
• outputting a determination result.

A non-transitory computer-readable storage medium that stores a state determination program for determining a state of a person and that when executed, the state determination program causes a processor of the state determination device to perform:

• receiving a plurality of eye region images captured at different timings in a time interval from when a person opening their eyes closes the eyes to when the person opens the eyes a next time and calculating a luminance value relating to a plurality of pixels included in each of the eye region images;
• calculating a time interval from a first time point when the luminance value relating to the pixels reaches a predetermined first luminance value for the first time to a second time point when the luminance value relating to the pixels reaches a second luminance value after the first time point, wherein if a time interval from the first time point to the second time point is a first time interval, determining that the person is in a first state, and if the time interval from the first time point to the second time point is a second time interval which is shorter than the first time interval, determining that the person is in a second state which differs from the first state;
• and
• outputting a determination result.

A non-transitory computer-readable storage medium that stores a state determination program for determining a state of a person and that when executed, the state determination program causes a processor of the state determination device to perform:

• receiving a first eye region image captured at a predetermined first time point in a time interval from when a person opening their eyes closes the eyes to when the person opens the eyes a next time and a second eye region image captured a predetermined second time point which is later than the first time point in the time interval and calculating a luminance value relating to a plurality of pixels included in each of the first eye region image and the second eye region image, wherein if a difference between the luminance value relating to the pixels in the first eye region image and the luminance value relating to the pixels in the second eye region image is equal to or smaller than a predetermined value, determining that the person is in a first state;
• and if the difference is greater than the predetermined value, determining that the person is in a second state which differs from the first state;
• and
• outputting a determination result.