Revelio: A Real-World Screen-Camera Communication System with Visually Imperceptible Data Embedding
This provides an unobtrusive method for meta-information transmission in applications like interactive television, addressing noise and distortion challenges in screen-camera channels.
The paper tackles the problem of screen-camera communication by developing Revelio, a system that embeds data in visually imperceptible ways using temporal flicker fusion and spatial encoding, achieving reliable decoding with standard smartphone cameras in real-world conditions.
We present `Revelio', a real-world screen-camera communication system leveraging temporal flicker fusion in the OKLAB color space. Using spatially-adaptive flickering and encoding information in pixel region shapes, Revelio achieves visually imperceptible data embedding while remaining robust against noise, asynchronicity, and distortions in screen-camera channels, ensuring reliable decoding by standard smartphone cameras. The decoder, driven by a two-stage neural network, uses a weighted differential accumulator for precise frame detection and symbol recognition. Initial experiments demonstrate Revelio's effectiveness in interactive television, offering an unobtrusive method for meta-information transmission.