Quick Start ​

This quick start guide describes the basic flow for measuring vital signs using Binah.ai SDK.

The SDK supports two measurements modes:

• Face Measurement
• Finger Measurement

A sample flow for face measurement follows. A similar flow can be applied for finger measurements. See Measurement Types for more information about measurement types.

Creating a Measurement Session ​

A session is an interface for performing vital sign measurements.

• A session is established to calculate either face measurements using the front camera or a finger measurement using the rear camera, as defined during the session creation.
• Only a single session can be created at any given time. Terminate the previous session before creating a new session.
• When switching to a different measurement type (from face to finger, or from finger to face), the current session must be terminated, and a new session must be created.
• A session is intended for a single user. When measuring the vital signs of another user, a new session must be created. See Demographic Info.

The following code can be used to create a session with the relevant parameters:

try {
    LicenseDetails licenseDetails = LicenseDetails("<ENTER_YOUR_LICENSE_KEY>");
    Session? session = await FaceSessionBuilder()
        .withImageDataListener(this)
        .withVitalSignsListener(this)
        .withSessionInfoListener(this)
        .build(licenseDetails);
} on HealthMonitorException catch(e) {
    print("Received Error. Domain: ${e.domain} Code: ${e.code}");
}

Waiting for the Session to Transition into ready State ​

The application can receive session state updates by implementing onSessionStateChange as part of SessionInfoListener.

@override
void onSessionStateChange(SessionState sessionState) {
    if (state == SessionState.ready) {
        print("Session is ready to start measuring");
    }
}

Starting a Measurement ​

A measurement can be started by calling the start method

try {
    var measurementDuration = 60;
    session.start(measurementDuration);
} on HealthMonitorException catch(e) {
    print("Received Error. Domain: ${e.domain} Code: ${e.code}");
}

Receiving Results During a Measurement ​

The application can receive instantaneous vital signs values by implementing onVitalSign as part of VitalSignsListener.

@override
 void onVitalSign(VitalSign vitalSign) {
    // Handle vital sign result
}

During the measurement, the instantaneous vital sign values are available only for specific vital signs, while the results of all vital signs are received once the measurement has been completed.

Stopping a Measurement ​

The measurement is stopped either after the measurement duration (provided in the start function) has ended, or when the stop method is called.

try {
    session.stop();
} on HealthMonitorException catch(e) {
    print("Received Error. Domain: ${e.domain} Code: ${e.code}");
}

Receiving Final Results ​

The application can receive final vital sign results and vital sign confidence levels by implementing onFinalResults as part of VitalSignsListener.

@override
void onFinalResults(VitalSignsResults results) {
    // Handle the final results of the measurements
}

The final results are computed when the session is in stopping state. For more information about receiving and handling the final results, see Vital Signs.

Terminating a Session ​

It is recommended to terminate the session whenever the measuring screen is not visible.

session.terminate();