Portable terminal having function of measuring mental fatigue, method for measuring same and server computer

A portable terminal device capable of measuring mental fatigue comprising:

• an operation unit;
• an imaging unit for measuring ambient light;
• a display screen;
• a light-emitting element for displaying a blinking image while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• and
• a recording unit for recording the flicker frequency, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image,
• wherein:
• first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, is associated with first environmental data, which represents the ambient light measured by the imaging unit, and the associated data is stored in the recording unit;
• and
• a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, is calculated to evaluate a degree of fatigue of the user, and the degree of fatigue is displayed on the display screen, and
• wherein:
• each of the first and second environmental data is a value calculated by
• K×Sn/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K;
• and image luminance data Sn obtained by the imaging unit capturing the reference image at a position having an arbitrary illuminance.

A portable terminal device capable of measuring mental fatigue comprising:

• an operation unit;
• an imaging unit for measuring ambient light;
• a display screen for displaying a blinking image while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• and
• a recording unit for recording the flicker frequency, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image,
• wherein:
• first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, is associated with first environmental data, which represents the ambient light measured by the imaging unit, and the associated data is stored in the recording unit;
• and
• a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, is calculated to evaluate a degree of fatigue of the user, and the degree of fatigue is displayed on the display screen, and
• wherein:
• each of the first and second environmental data is a value calculated by
• α×K×Hp/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K, image luminance data Hp obtained by the imaging unit capturing a part of the user's body or an object that the user carries, and a correction factor α.

A portable terminal device capable of measuring mental fatigue comprising:

• an operation unit;
• an imaging unit for measuring ambient light;
• a display screen;
• a light-emitting element for displaying a blinking image while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• and
• a recording unit for recording the flicker frequency, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image,
• wherein:
• first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, is associated with first environmental data, which represents the ambient light measured by the imaging unit, and the associated data is stored in the recording unit;
• and
• a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, is calculated to evaluate a degree of fatigue of the user, and the degree of fatigue is displayed on the display screen, and
• wherein:
• each of the first and second environmental data is a value calculated by
• α×K×Hp/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K, image luminance data Hp obtained by the imaging unit capturing a part of the user's body or an object that the user carries, and a correction factor α.

A method for measuring mental fatigue using a portable terminal device comprising an operation unit, an imaging unit, a display screen, and a recording unit,

• the method comprising the steps of:
• 1) measuring ambient light using the imaging unit;
• 2) displaying a blinking image on the display screen while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• 3) recording the flicker frequency in the recording unit, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image;
• 4) associating first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, with first environmental data, which represents the ambient light measured by the imaging unit, and storing the associated data in the recording unit;
• and
• 5) calculating a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, to evaluate a degree of fatigue of the user, and displaying the degree of fatigue on the display screen,
• wherein:
• each of the first and second environmental data is a value calculated by
• K×Sn/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K, and image luminance data Sn obtained by the imaging unit capturing the reference image at a position having an arbitrary illuminance.

A method for measuring mental fatigue using a portable terminal device comprising an operation unit, an imaging unit, a display screen, a light-emitting element, and a recording unit,

• the method comprising the steps of:
• 1) measuring ambient light using the imaging unit;
• 2) displaying a blinking image on the light-emitting element while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• 3) recording the flicker frequency in the recording unit, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image;
• 4) associating first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, with first environmental data, which represents the ambient light measured by the imaging unit, and storing the associated data in the recording unit;
• and
• 5) calculating a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, to evaluate a degree of fatigue of the user, and displaying the degree of fatigue on the display screen,
• wherein:
• each of the first and second environmental data is a value calculated by
• K×Sn/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K, and image luminance data Sn obtained by the imaging unit capturing the reference image at a position having an arbitrary illuminance.

A method for measuring mental fatigue using a portable terminal device comprising an operation unit, an imaging unit, a display screen, and a recording unit,

• the method comprising the steps of:
• 1) measuring ambient light using the imaging unit;
• 2) displaying a blinking image on the display screen while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• 3) recording the flicker frequency in the recording unit, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image;
• 4) associating first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, with first environmental data, which represents the ambient light measured by the imaging unit, and storing the associated data in the recording unit;
• and
• 5) calculating a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, to evaluate a degree of fatigue of the user, and displaying the degree of fatigue on the display screen,
• wherein:
• each of the first and second environmental data is a value calculated by
• α×K×Hp/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K, image luminance data Hp obtained by the imaging unit capturing a part of the user's body or an object that the user carries, and a correction factor α.

A method for measuring mental fatigue using a portable terminal device comprising an operation unit, an imaging unit, a display screen, a light-emitting element, and a recording unit,

• the method comprising the steps of:
• 1) measuring ambient light using the imaging unit;
• 2) displaying a blinking image on the light-emitting element while a flicker frequency of the blinking image is being monotonically changed with time from a start frequency to an ending frequency;
• 3) recording the flicker frequency in the recording unit, as a measurement frequency, at the time when a user operates the operation unit to indicate that the user perceives flicker during the display of the blinking image;
• 4) associating first frequency data, which is the measurement frequency measured when the user is specified as being healthy via the operation unit, with first environmental data, which represents the ambient light measured by the imaging unit, and storing the associated data in the recording unit;
• and
• 5) calculating a proportion of decrease of second frequency data, which is the measurement frequency measured when the user is not specified as being healthy via the operation unit, from the first frequency data associated with the first environmental data having the same order of magnitude as that of second environmental data, which represents the ambient light measured by the imaging unit, to evaluate a degree of fatigue of the user, and displaying the degree of fatigue on the display screen,
• wherein:
• each of the first and second environmental data is a value calculated by
• α×K×Hp/Ss,
• using image luminance data Ss obtained by capturing a reference image at a position having an illuminance of K, image luminance data Hp obtained by the imaging unit capturing a part of the user's body or an object that the user carries, and a correction factor α.