Liveness

SDK.detect_blink(self: tfsdk.SDK) → Tuple[Trueface::ErrorCode, float, float]

Estimate score for eyes blink. Returns the left and right eye wink score, in that order. Score indicates likelihood of eye being open (0 is closed, 1 is open). Optimal threshold is 0.4 in normal use and 0.1 in low light conditions

Use the following guidelines for best performance:

• Camera should see frontal view of the face

• The eyes should be looking directly into the camera

• The face should be 1 - 2 ft from the camera

• Recommended 640 x 480 resolution or better

• Ensure there is good lighting illuminating the eyes