Color Barcodes for Display Applications  [paper] 

We present a per-channel framework for extending monochrome barcodes to color for display applications, offering increased data rates and capacity. Data is independently encoded into barcodes, incorporated within a color image as the red (R), green (G), and blue (B) channels and decoded from the corresponding R, G, and B channels in the image of the displayed barcode captured with a smartphone. Using a physical model for the display and capture processes, we show that the cross-channel interference in this situation is appropriately modeled by a linear mixing relation. Via experiments done over multiple smartphones and displays, we demonstrate that the impact of the interference is small and can be further mitigated through the use of interference cancellation. 

Pareto Optimal Color Display Primary Design [project page]

Optimization of individual display primary attributes often drives primary choices in different directions. For example, expansion of color gamut favors narrow spectral bandwidth saturated primaries and minimization of observer metamerism favors broadband primaries. To characterize the tradeoffs between the different attributes in primary design for three-primary and multiprimary displays, we propose a multi-objective optimization framework for determining the complete range of available primary choices that optimally negotiate the tradeoffs between the metrics for the different attributes.

Selected Publications