Biometric information display apparatus, method, and program
A biometric information display apparatus ( 30 ) for displaying a measurement result obtained by measuring a biometric signal, includes a maximum value calculation unit ( 63 ) configured to calculate a maximum value of the measurement result in a certain period of time for at least one of blocks into which a measurement area, in which the biometric signal is measured, is divided, a determination unit ( 64 ) configured to determine whether a measurement value in the at least one of blocks is greater than or equal to a threshold value obtained by multiplying the maximum value by a fractional value, the fractional value being determined in advance, and a display control unit configured to display, in response to an occurrence of an event in which the measurement value is determined to be greater than or equal to the threshold value, the measurement result in such a manner as to indicate the occurrence of the event.
1. A biometric information display apparatus for displaying a measurement result obtained by measuring a biometric signal, comprising:
a maximum value calculation unit configured to calculate a maximum value of an electric current waveform in a certain time period for each of a plurality of blocks into which a measurement area is divided, the measurement area being an area in which the biometric signal is measured, the each of the plurality of blocks having the electric current waveform representing temporal changes of electric current values measured in the each of the plurality of blocks;
a determination unit configured to determine for the each of the plurality of blocks whether a value of the electric current waveform in the certain time period in the each of the plurality of blocks is greater than or equal to a threshold value, the threshold value being obtained by multiplying the maximum value calculated for the each of the plurality of blocks by a predetermined fractional value specific to the each of the plurality of blocks; and
a display control unit configured to display the electric current waveform for the each of the plurality of blocks in a manner indicating an occurrence of an event, in response to determining that the value of the electric current waveform in the certain time period in the each of the plurality of blocks is greater than or equal to the threshold value.
2. The biometric information display apparatus according to claim 1 , wherein the plurality of blocks includes:
a positively-determined block in which the value of the electric current waveform within the certain time period is determined to be greater than or equal to the threshold value; and
a negatively-determined block in which the value of the electric current waveform within the certain time period is determined to be less than the threshold value,
wherein the positively-determined block is displayed in a manner different from the negatively-determined block.
3. The biometric information display apparatus according to claim 2 , wherein a figure indicating that the value of the electric current waveform within the certain time period is determined to be greater than or equal to the threshold value is displayed with the positively-determined block.
4. The biometric information display apparatus according to claim 2 , wherein the electric current waveform in the each of the plurality of blocks is displayed with the each of the plurality of blocks, and
the electric current waveform of the positively-determined block is displayed in a manner different from the electric current waveform of the negatively-determined block.
5. The biometric information display apparatus according to claim 1 , wherein the display control unit displays a morphological image of a living body for the measurement area,
the display control unit sets the plurality of blocks on the displayed morphological image, and
the display control unit displays, for the each of the plurality of blocks, the electric current waveform superimposed on the displayed morphological image in such a manner as to indicate the occurrence of the event.
6. The biometric information display apparatus according to claim 5 , wherein the display control unit sets the plurality of blocks in at least one of a plurality of areas in the displayed morphological image, and
the display control unit sets a size of the each of the plurality of blocks for the at least one of the plurality of areas.
7. The biometric information display apparatus according to claim 5 , wherein the biometric signal is a magnetic field signal which is a vector quantity, a current signal which is a vector quantity calculated from a measured magnetic field, or a current signal which is a vector quantity calculated from a measured potential,
the display control unit sets the plurality of blocks in at least one of a plurality of areas in the displayed morphological image, and
the display control unit sets a component direction of the electric current waveform, which is a vector quantity, for the at least one of the plurality of areas.
8. The biometric information display apparatus according to claim 1 , wherein the biometric signal is a magnetic field signal which is a vector quantity, a current signal which is a vector quantity calculated from a measured magnetic field, or a current signal which is a vector quantity calculated from a measured potential.
9. The biometric information display apparatus according to claim 8 , wherein the display control unit sets a component direction of the electric current waveform, and
the maximum value is a maximum value of the electric current waveform in the component direction.
10. The biometric information display apparatus according to claim 9 , wherein the electric current waveform in the component direction is obtained from the biometric signal measured by a sensor having one or more axes.
11. The biometric information display apparatus according to claim 1 , wherein the biometric signal is a signal derived from a skeletal muscle, myocardium, smooth muscle, or nerve of a living body.
12. A biometric information display method executed by a biometric information display apparatus displaying a measurement result obtained by measuring a biometric signal, the biometric information display method comprising:
calculating a maximum value of an electric current waveform in a certain period of time for each of a plurality of blocks into which a measurement area is divided, the measurement area being an area in which the biometric signal is measured, the each of the plurality of blocks having the electric current waveform representing temporal changes of electric current values measured in the each of the plurality of blocks;
determining for the each of the plurality of blocks whether a value of the electric current waveform in the certain time period in the each of the plurality of blocks is greater than or equal to a threshold value, the threshold value being obtained by multiplying the maximum value calculated for the each of the plurality of blocks by a predetermined fractional value specific to the each of the plurality of blocks; and
displaying the electric current waveform for the each of the plurality of blocks in a manner indicating an occurrence of an event, in response to determining that the value of the electric current waveform in the certain time period in the each of the plurality of blocks is greater than or equal to the threshold value.
13. A non-transitory computer-readable recording medium storing a display program executed by a biometric information display apparatus displaying a measurement result obtained by measuring a biometric signal, the display program causing the biometric information display apparatus to perform operations comprising:
calculating a maximum value of an electric current waveform in a certain period of time for each of a plurality of blocks at least one block from among blocks-into which a measurement area is divided, the measurement area being an area in which the biometric signal is measured, the each of the plurality of blocks having the electric current waveform representing temporal changes of electric current values measured in the each of the plurality of blocks;
determining for the each of the plurality of blocks whether a value of the electric current waveform in the certain time period in the each of the plurality of blocks is greater than or equal to a threshold value, the threshold value being obtained by multiplying the maximum value calculated for the each of the plurality of blocks by a predetermined fractional value specific to the each of the plurality of blocks; and
displaying the electric current waveform for the each of the plurality of blocks in a manner indicating an occurrence of an event, in response to determining that the value of the electric current waveform in the certain time period in the each of the plurality of blocks is greater than or equal to the threshold value.