19 January 2009 Spectral printer modeling for transparency media: toward high dynamic range scene reproduction
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Abstract
We propose a system for display of large format images such that natural scenes can be approximated in a laboratory setting, both spectrally and in dynamic range. The system uses a large area (48"x36") high intensity light box constructed using multiple xenon arc lamps with diffusers to maximize surface uniformity. This source is used as a back light for multiple transparency layers mounted on a rigid plexiglass substrate, where images are printed on the transparency layers using a wide format inkjet printer. A detailed transparency printer model for this system is described, where the spectral transmittance can be predicted with a high degree of accuracy for any given combination of input digital ink values (CMYKRGB). This spectral printer model, in conjunction with knowledge of the spectral characteristics of the back light, can be used to approximate the spectral radiance of a target scene. On a per-pixel level, nonlinear constrained optimization is used to solve for the combination of printer inks that produces the best estimate to the spectrum of the target scene. With this system, it is then possible to create realistic static images with a large dynamic range that can be used to benchmark camera systems in a controlled laboratory setting.
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Jon McElvain, Jon McElvain, Jonathan Miller, Jonathan Miller, Elaine Jin, Elaine Jin, } "Spectral printer modeling for transparency media: toward high dynamic range scene reproduction", Proc. SPIE 7241, Color Imaging XIV: Displaying, Processing, Hardcopy, and Applications, 72410U (19 January 2009); doi: 10.1117/12.806123; https://doi.org/10.1117/12.806123
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