In recent years, monitoring equipment plays an increasingly important role in our daily life. However, it’s often involved with privacy leakage. Monitoring equipment is originally used to protect public safety or people’s properties, but becomes a serious threat to personal privacy even national security. Therefore, we proposed an anti-photograph jammer that can prevent secret filming using cameras and webcams.
Our scheme utilizes the difference of light perception between human eyes and camera image sensors. The eyes of human can only perceive visible light while the image sensors of camera are able to perceive a wider spectrum including infrared ray. By utilizing such a principle, the anti-photograph jammers can interfere with secret filming, making it unable to shoot a distinguishable photo without user awareness.