A Systematic Scheme for Measuring the Performance of the Display-Camera Channel

TL;DR

This paper introduces a systematic calibration scheme for accurately measuring display-camera channel performance, addressing inconsistencies caused by various unstable factors to improve experimental reliability.

Contribution

It proposes a comprehensive calibration method for display-camera channels, identifying key unstable factors and establishing consistency criteria for more reliable measurements.

Findings

Calibration scheme improves measurement consistency

Identifies key unstable channel factors

Enhances reliability of display-camera communication experiments

Abstract

Display-camera communication has become a promising direction in both computer vision and wireless communication communities. However, the consistency of the channel measurement is an open issue since precise calibration of the experimental setting has not been fully studied in the literatures. This paper focuses on establishing a scheme for precise calibration of the display-camera channel performance. To guarantee high consistency of the experiment, we propose an accurate measurement scheme for the geometric parameters, and identify some unstable channel factors, e.g., Moire effect, rolling shutter effect, blocking artifacts, inconsistency in auto-focus, trembling and vibration. In the experiment, we first define the consistency criteria according to the error-prone region in bit error rate (BER) plots of the channel measurements. It is demonstrated that the consistency of the experimental result can be improved by the proposed precise calibration scheme.