Integral imaging, i.e., the use of lenticular optics to display stereoscopic/multiscopic images, is now being used in an array of products including glasses-free 3D displays. This paper describes integral illumination, an adaptation of integral imaging where fine-grained control of plenoptic light fields is used to realize new forms of programmable lighting. Relying on a combination of an imaging apparatus and custom lenticular optics, integral illumination devices can produce high-fidelity illusions of real and imagined light sources (e.g., spotlight, chandelier), replicating their illumination effects. Such devices have potential uses as ambient lighting fixtures, photography/videography equipment, components of artistic installations, etc. The paper will provide a general overview of integral illumination, describing its basic principles, hardware configuration, control mechanism, range of capabilities, and theoretical/practical limitations. We will also present a sample implementation of a working integral illumination device, describe its engineering details, report performance measurements, and discuss possibilities for future improvements and extensions.INDEX TERMS Integral illumination, integral imaging, plenoptic light field, programmable lighting.
We report the results of viewer perception of the degree of the white uniformity of LED backlight and photometric data measured by a 2D colorimeter. We propose a multiple regression model in order to provide a more dependable check on the uniformity of LED backlights.
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