These systems usually have blink detection, so you would at least have to scan the photo, convert to video, and blank out the eyes temporarily (blink detection

These systems usually have blink detection, so you would at least have to scan the photo, convert to video, and blank out the eyes temporarily (blink detection tends to be quite crude). Other systems require you to record a video of you saying a particular sentence which is then checked (presumably) by a human. And others require a video call to a real person.