Images

The application can receive the camera image stream from the SDK by implementing ImageListener, and then pass it to the session builder when creating a face session.

The SDK sends an ImageData object that contains:

• The current image captured by the camera.
• The face detection coordinates, as calculated by the SDK.
• The image validity information.

Swift

func onImage(imageData: ImageData) {
    DispatchQueue.main.async {
        // imageData.image -            A UIKit.UIImage object
        // imageData.roi -              A CGRect object
        // imageData.imageValidity -    An integer with a value from BiosenseSignal.ImageValidity class
    }
}

Objective-C

- (void)onImageWithImageData:(BIOImageData *)imageData {
    dispatch_async(dispatch_get_main_queue(), ^{
        // imageData.image -            A UIKit.UIImage object
        // imageData.roi -              A CGRect object
        // imageData.imageValidity -    An integer with a value from BIOImageValidity class
    });
}

By default, the SDK processes camera images in a portrait orientation, regardless of the device orientation. Instructions on how to process the camera stream in other orientations can be found at Device Orientation Setup.

Important

Note that images are sent on a background thread. The application must switch to the UI thread in order to perform UI updates.