The Department of Homeland Security is combining machine learning with video technology to boost the precision of visual drone detection.
DHS said Friday it is working with Sandia National Laboratories to explore temporal frequency analysis, an approach focusing on an image's pixel fluctuation.
This machine learning-based approach analyzes the pixel fluctuation frequency of an image to determine the subject drone's temporal frequency signature.
“You can train neural networks to recognize patterns, and the algorithm can begin to pick up on certain features," said Jeff Randorf, an engineering adviser at DHS' Science and Technology Directorate.
TFA relies purely on visuals, and does not require thermal, radio and acoustic elements.
The approach focuses on a drone's movements through time, and addresses the gap of radio signal detection that may not be applied to autonomous drones.
Sandia tested the TFA approach with three drone types in a high-clutter environment consisting of birds, cars and helicopters.
Researchers found through the experiment that TFA significantly helped the detection system distinguish drones from birds.