A method includes receiving a video signal that comprises a time series of images of a face of a human, wherein the images in the time series of images comprise a set of landmark points in the face, applying tracking processing to the video signal to reveal variations over time of at least one image parameter at the set of landmark points in the human face, generating a set of variation signals indicative of variations revealed at respective landmark points in the set of landmark points, applying processing to the set of variation signals, the processing comprising artificial neural network processing to produce a reconstructed PhotoPletysmoGraphy (PPG) signal, and estimating a heart rate variability of a variable heart rate of the human as a function of the reconstructed PPG signal.

The present disclosure provides computing systems and techniques for indicating an emotional and/or environmental state of a user in a digital messaging application. A computing device can determine an emotional and/or environmental state of a first user responsive to reading or responding to a message and can convey the determined emotional and/or environmental state to a second computing device, to be transiently presented by the second computing device.

A method and apparatus of determining health risk for a user are described. The method includes obtaining heart rate values and motion information indicative of motion of the user recorded over a monitoring period, wherein the heart rate values are obtained according to a variable sampling rate selected based on a comparison of at least one previous heart beat measurement to a heart rate range determined as a difference between a maximum heart rate of the user and a resting heart rate of the user; determining an expected heart rate level based on the motion information; determining, for the user over the monitoring period, an aggregate heartbeat value by weighting the heart rate values based on both the motion information and a comparison of the heart rate values with the expected heart rate level; and determining a health-predictive activity score based on the aggregate heartbeat value for the user.

Provided are a portable electronic device, an accessory, and an operation method thereof. The portable electronic device includes a light source irradiating light to skin, at least one light detector detecting light received from the skin, at least one memory storing an instruction, and a processor, by executing the instruction, controlling the light source to irradiate the light and analyzing a skin state based on light detected by the light detector.

Systems and processes for measuring and sizing a foot are provided. In one exemplary process, at least one image of a foot and a horizontal reference object from a first point of view is captured. A portion of the foot may be disposed against a vertical reference object. The at least one image may be displayed, where one or more camera guides are overlaid on the at least one displayed image. In response to aligning the one or more camera guides with one or more of the horizontal reference object and the vertical reference object, a measurement of the foot based on the at least one captured image from the first point of view is determined.

A blood pressure measurement method using a display device including: a display panel including first sub-pixels and second sub-pixels; a pressure sensor to sense a pressure applied from the outside; and a photo-sensor to sense light, includes: generating a first pulse wave signal according to light emitted by the first sub-pixels and sensed by the photo-sensor; generating a second pulse wave signal according to light emitted by the second sub-pixels and sensed by the photo-sensor; generating a third pulse wave signal by removing noise from the second pulse wave signal based on the first pulse wave signal, the second pulse wave signal, and a maximum value of the first pulse wave signal; and calculating blood pressure information based on the third pulse wave signal and a pressure measurement value sensed by the pressure sensor. The blood pressure information is displayed on the display panel.

The present invention relates to devices and methods for determining an emotional state of a user. Specifically, a computer-implemented method is provided comprising measuring a galvanic skin response voltage and a skin temperature of the user by first and second sensors; passing these values to a processor for comparison to a plurality of predefined threshold values, each being associated with one or more likely emotional states;; and based on the comparisons of the first and second measured values, determining an emotional state of the user, and in response to the determination that the user is in a particular emotional state, initiating one or more protocols for adapting the environment of the user to that emotional state. A device configured to carry out the operations required to perform the method is also provided.

Systems and methods for assessing PPG signals generated based on transdermal optical data can include a computing device generating a color intensity signal using an acquired sequence of transdermal images of a subject. The computing device can compute a signal quality metric of the color intensity signal. The computing device can provide an indication of a quality of the color intensity signal for display on a display device associated with the computing device. The indication of the quality of the color intensity signal can be determined based on the signal quality metric.

An assembly for measuring bio-information includes a finger contact interface configured to move based on a contact force applied by a finger of a user to the finger contact interface; a bio-sensor configured to measure the bio-information of the user based on the finger being in contact with the finger contact interface; a force sensor configured to measure the contact force of the finger applied to the finger contact interface; and a support configured to guide movement of the finger contact interface and support the force sensor against the finger contact interface.

An apparatus for generating ECG recordings and a method for using the same are disclosed. The apparatus includes a handheld device having four electrodes on an outer surface thereof, the handheld device having an extended configuration and a storage configuration. The apparatus also includes a controller configured to measure signals between the electrodes to provide signals that are used to generate an ECG recording selected from the group consisting of standard lead traces and precordial traces. When the handheld device is in the extended configuration and the first and second electrodes contact a first hand of a patient such that the first and second electrodes contact different locations on the first hand, the third electrode is in contact with a location on the patient's other hand and the fourth electrode contacts a point on the patient's body that depends on the particular trace being measured.