diff --git a/blog/posts/biometrics-explained.md b/blog/posts/biometrics-explained.md index 16d331e7..f1c4b4d5 100644 --- a/blog/posts/biometrics-explained.md +++ b/blog/posts/biometrics-explained.md @@ -68,10 +68,9 @@ Conveniently they also don't require a light source under them to work, although Ultrasonic fingerprint sensors use sound to create a detailed 3D representation of your fingerprint using ultrasound waves (sound waves with a frequency greater than 20khz). It's a similar concept to what's used to map the ocean floor: sound is emitted from transducers and bounces off your skin. By measuring the time it takes for the sound to reach the microphones, your phone can create a detailed map of the ridges and valleys in your finger. -
- ![Diagram showing the transducers emitting ultrasound waves and reflecting off the finger tissue bouncing back and then being picked up by microphones](../assets/images/biometrics-explained/ultrasonic-diagram.png) -
source: Yipeng Lu
-
+![Diagram showing the transducers emitting ultrasound waves and reflecting off the finger tissue bouncing back and then being picked up by microphones](../assets/images/biometrics-explained/ultrasonic-diagram.png) + + This is the most expensive type of sensor but it produces the most accurate readings with the highest reliability. It doesn't matter if your finger is a bit dirty or wet, it will still work unlike optical or capacitive sensors.