Apparatus and method for estimating bio-information
AssigneeSamsung Electronics Co., Ltd.
InventorsJae Min Kang, Yong Joo Kwon, Youn Ho Kim, Sang Yun Park
Life of this patent
Estimating the term…
Abstract
An apparatus for estimating bio-information includes: a sensor part configured to obtain contact pressure of a contact surface contacted by an object, and configured to obtain a contact image of the object that contacts the contact surface; and a processor configured to obtain a pulse wave signal of a region of interest based on the contact image, and configured to estimate bio-information based on the obtained pulse wave signal and the contact pressure.
Claims17
An apparatus for estimating bio-information, the apparatus comprising:
- a sensor part comprising a contact pressure sensor array configured to obtain a contact pressure distribution of a contact pressure on a contact surface contacted by an object during a measurement period, and an image sensor configured to obtain a contact image of the object that contacts the contact surface at each measurement time in the measurement period;
- and
- a processor configured to:
- obtain a pulse wave signal of a region of interest based on the contact image, wherein amplitudes of the pulse wave signal of the region of interest at each measurement time are determined by using pixel values of the region of interest corresponding to each measurement time;
- obtain a contact pressure of the region of interest based on the contact pressure distribution;
- extract a peak-to-peak amplitude of each measurement time, by subtracting an amplitude value of a negative (−) point from an amplitude value of a positive (+) point of a waveform envelope of the pulse wave signal corresponding to each measurement time;
- obtain an oscillometric envelope by plotting the extracted peak-to-peak amplitude of the pulse wave signal of the region of interest based on a contact pressure at a same measurement time of the peak-to-peak amplitude;
- obtain at least one feature value based on the oscillometric envelope;
- and
- estimate the bio-information by using the at least one feature value.
A method of estimating bio-information, the method comprising:
- obtaining, by using a contact pressure sensor array, a contact pressure distribution of a contact pressure on a contact surface contacted by an object during a measurement period;
- obtaining, by using an image sensor, a contact image of the object that contacts the contact surface at each measurement time in the measurement period;
- obtaining a pulse wave signal of a region of interest based on the contact image, wherein amplitudes of the pulse wave signal of the region of interest at each measurement time are determined by using pixel values of the region of interest corresponding to each measurement time;
- obtaining a contact pressure of the region of interest based on the contact pressure distribution;
- extracting a peak-to-peak amplitude of each measurement time, by subtracting an amplitude value of a negative (−) point from an amplitude value of a positive (+) point of a waveform envelope of the pulse wave signal corresponding to each measurement time;
- obtaining an oscillometric envelope by plotting the extracted peak-to-peak amplitude of the pulse wave signal of the region of interest based on a contact pressure at a same measurement time of the peak-to-peak amplitude;
- obtaining at least one feature value based on the oscillometric envelope;
- and
- estimating the bio-information by using the at least one feature value.
Dependencies are inferred from the claim text.