PrivacyHFR: Visual Privacy Preserving for Heterogeneous Face Recognition.

Summary: Face recognition technology is everywhere, from unlocking your phone to security cameras. However, it can put our privacy at risk if hackers steal these images. Sometimes, cameras use different types of sensors (like regular cameras or infrared ones), making it even harder to protect privacy.

Scientists have created a new tool called "Privacy-HFR." This tool changes the face images so that human eyes or hackers can't recognize them, but the computer can still match the faces correctly. It works by tweaking the hidden "frequency" signals in the image and adding clever noise to stop hackers from fixing the picture. Tests on thousands of images show this new tool is the best at keeping faces private while still working perfectly for the computer.