Compressive dynamic range imaging via Bayesian shrinkage dictionary learning

Xin Yuan

doi:10.1117/1.OE.55.12.123110

22 December 2016 Compressive dynamic range imaging via Bayesian shrinkage dictionary learning

Xin Yuan

Author Affiliations +

Optical Engineering, Vol. 55, Issue 12, 123110 (December 2016). https://doi.org/10.1117/1.OE.55.12.123110

Abstract

We apply the Bayesian shrinkage dictionary learning into compressive dynamic-range imaging. By attenuating the luminous intensity impinging upon the detector at the pixel level, we demonstrate a conceptual design of an 8-bit camera to sample high-dynamic-range scenes with a single snapshot. Coding strategies for both monochrome and color cameras are proposed. A Bayesian reconstruction algorithm is developed to learn a dictionary in situ on the sampled image, for joint reconstruction and demosaicking. We use global-local shrinkage priors to learn the dictionary and dictionary coefficients representing the data. Simulation results demonstrate the feasibility of the proposed camera and the superior performance of the Bayesian shrinkage dictionary learning algorithm.

Citation Download Citation

Xin Yuan "Compressive dynamic range imaging via Bayesian shrinkage dictionary learning," Optical Engineering 55(12), 123110 (22 December 2016). https://doi.org/10.1117/1.OE.55.12.123110

Received: 27 June 2016; Accepted: 29 November 2016; Published: 22 December 2016

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