DisCo: Displays that Communicate

Jo, Kensei; Gupta, Mohit; Nayar, Shree K.

We present DisCo, a novel display-camera communication system that enables displays to send short messages to digital sensors, while simultaneously displaying images for human consumption. Existing display-camera communication methods are largely based on spatial-domain steganography, where the information is encoded as an imperceptible spatial signal (e.g., QR-code). These methods, while simple to implement, are prone to errors due to common causes of image degradations such as occlusions, display being outside the sensor’s field-of-view, defocus blur and perspective distortion. Due to these limitations, steganography based techniques have not been widely adopted, specially in uncontrolled settings involving consumer cameras and public displays.



More About This Work

Academic Units
Computer Science
Department of Computer Science, Columbia University
Columbia University Computer Science Technical Reports, CUCS-028-14
Published Here
January 30, 2015