Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1111 for “"Illumination"”.
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Illumination
A spatial sequence unfolds and is revealed over time. It is perceived through motion, movement channeled through the space with light and form. The layering and overlapping of surface creates a relationship of light and dark between preceding and receding forms. Light gives depth to this space and …
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Inspiration to Illumination
This thesis is the result of insights gained from investigation of the work of Carlo Scarpa and applied to the making of a lamp. Scarpa's work has influenced this work in many ways but most fascinating is the way detail is used. The indirect connection between parts and blending of precious and …
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Single-Shot Optical Sectioning Using Polarised Illumination Coded Structured Illumination Microscopy (picoSIM)
… wide-eld microscope features a uniform illumination of an extended sample region. A problem arises with this setup since light from outof-focus uorophores is also detected. The result is poor quality in the nal image, as out-of-focus structures appear blurred; furthermore, their emission …
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Parallel hierarchical global illumination
<p>Solving the global illumination problem is equivalent to determining the intensity of every wavelength of light in all directions at every point in a given scene. The complexity of the problem has led researchers to use approximation methods for solving the problem on serial computers. Rather …
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Importance Resampling for Global Illumination
This thesis develops a generalized form of Monte Carlo integration called Resampled Importance Sampling. It is based on the importance resampling sample generation technique. Resampled Importance Sampling can lead to significant variance reduction over standard Monte Carlo integration for common …
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Defeating eavesdropping with quantum illumination
Quantum illumination is a paradigm for using entanglement to gain a performance advantage-in comparison with classical-state systems of the same optical power-over lossy, noisy channels that destroy entanglement. Previous work has shown how it can be used to defeat passive eavesdropping on a …
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Target detection through quantum illumination
… of target detection enhanced by quantum illumination (QI). Nondegenerate, time entangled signal and idler beams are created through Type-O spontaneous parametric downconversion (SPDC). The signal is attenuated and combined with large levels of noise. The signal is phase modulated to …
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Inverse Illumination Design with Genetic Programming
Interior illumination is a complex problem involving numerous interacting factors. This research applies genetic programming towards problems in illumination design. The Radiance system is used for performing accurate illumination simulations. Radiance accounts for a number of important …
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Architectural illumination : some aspects of flexibility
Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1954.
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Shape, Reflectance, and Illumination From Appearance
… estimating shape, material properties, and/or illumination passively from the object’s appearance. Such “inverse rendering” capabilities enable 3D understanding of our world (as desired in autonomous driving, robotics, etc.) and computer graphics applications such as relighting, view synthesis, …
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White LED for general illumination applications
… Evaluation in the potential of LEDs for general illumination will be carried out through cost modeling and performance analysis.
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Local illumination models from surface geometry microform
In this thesis, we propose a model to simulate the small-scale geometry of cloth and develop a method to derive the BRDF (Bidirectional Reflectance-Distribution Function) of this model from the underlying surface geometry, taking into account the blocking and shadowing phenomena at the small scale. …
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IMPROVING GLOBAL ILLUMINATION WITH A-BUFFER TECHNIQUE
Two of the main issues m radiosity generated images are efficient form factor computation and proper mesh generation. Although hemicube algorithm remains a simple and fast method for radiosity form factor computation, its simple sampling scheme for the hemicube pixels causes unacceptable accuracy …
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ILLUMINATION RECOVERY FROM IMAGES WITH CAST SHADOWS
… This makes it difficult to recover the illumination from a scene and recognize objects from the images. In this paper, we show that such images can be well approximated using much simpler lighting represented by a combination of low frequency spherical harmonics, and a small number of …
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Sampling Methods in Ray-Based Global Illumination
… light transport are collectively known as Global Illumination methods. The most versatile of these are based on ray tracing (following ray paths through a scene), and numerical integration using random or quasi-random sampling. While ray tracing and sampling methods in global illumination have …
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Brightness and Illumination by Interreflections in Enclosures
Made available in DSpace on 2014-12-04T21:02:38Z (GMT). No. of bitstreams: 1 0007885.pdf: 8915093 bytes, checksum: 3406bbcb7458b4309c78d51a4d7b8166 (MD5) Previous issue date: 1954
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Antenna Aperture Illumination, Resolution, and Image Quality
Made available in DSpace on 2014-12-04T21:03:08Z (GMT). No. of bitstreams: 1 5902045.pdf: 6642583 bytes, checksum: 495f132bea80de9df26f4050d2b34153 (MD5) Previous issue date: 1959
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Human visual perception under real-world illumination
… reflectance and 3D shape - across changes in the illumination? Under arbitrary patterns of illumination this problem is ill-posed. However, in the real world, illumination is not arbitrary. Here I argue that the visual system exploits the statistical regularities of real-world illuminations to …
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