Dissertation Overview

The central contribution of this dissertation is the introduction of the digital light field photography system: a general solution to the three manifestations of the focus problem discussedin this introduction.The following four themes unify presentation of the systemand analysis of its performance in the coming chapters.

• System Design: Optics and Algorithms This dissertation discusses the optical principles and trade-offs in designing cameras for digital light field photography. The second part of the systems contribution is the development of specific algorithms to address the different manifestations of the focus problem.

• Mathematical Analysis of Performance Three mathematical tools have proven particularly useful in reasoning about digital light field photography. The first is the traditional tracing of rays through optical systems. The second is a novel Cartesian ray-space diagramthat unifies visualizations of light field recording and photograph computation. The third is Fourier analysis, which yields the simplest way to understand the relationship between light fields and photographs focused at different depths. These tools have proven remarkably reliable at predicting system performance.

• Computer-Simulated Validation Software ray-tracing enables computer-aided plotting

of ray traces and ray-space diagrams. Furthermore, when coupled with a complete computer graphics rendering system, it enables physically-accurate simulation of light fieldsand final photographs from hypothetical optical designs.

• A Prototype Camera and Experimental Validation Themost tangible proof of system viability is a system that works, and this dissertation presents a second-generation prototype light field camera. This implementation provides a platform for in-depth physical validation of theoretical and simulated performance. The success of these tests provides some reassurance as to the end-to-end viability of the core design principles. In addition, I have used the prototype to explore real live photographic scenarios beyond the reach of theoretical analysis and computer simulation. a beauty in photography not just adrift on a good camera lens, but also needed a favor to get their lighting Develop a masterpiece that is preferable in the public and to our ownsatisfaction. and the most important art of photography in a creative need in the run. only as a suggestion for a beginner photography is preferable to use the open space because there they will get the lighting perfect enough to be photographed and produced an excellent photo.

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