authentication – Biometrics for IoT system

In Internet of Things (IoT) systems, biometrics may be used to authenticate or identify a person to allow access. The database consisting of templates generated from face images, for example, is stored on a server or cloud. During authentication, a face image is captured by a camera and wirelessly transmitted to the server to perform matching.

  1. What is the suitable wireless transmission technique for the image to be transmitted from the camera to the server?
  2. What is the effect of wireless transmission on the received image? I think if the image is distorted due to propagation problems, the authentication result may be not correct.
  3. Which is better? To transmit the image to the server, and perform the feature extraction process there? or to perform feature extraction before transmission, and transmit the features instead of the image?