Digital Analysis of How Linear Perspective Views Transform Real Space

From the 15th century onward, painters and architects produced views of real urban spaces like city squares using linear perspective. While it is universally accepted that linear perspective allowed these artists to imitate reality to a high degree, scholarship has largely overlooked the fact that these views artificially rectified the often irregular layout of the urban spaces they depict. My project seeks to discover whether there is a systematic difference between real urban spaces and the way in which they were depicted in the age of linear perspective drawing. With digital image processing, any drawing or painting may be compared to a photographic image of the actual space from the same viewpoint; but replicating these arbitrary viewpoints would require a 3D model of the space. Using the Capitoline Square in Rome as a case study, I plan to travel there to obtain a 3D model of the space using photogrammetry […]

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Double Source Lensing as a Cosmological Probe at High Lens Redshifts

Strong gravitational lenses (deflection of light into multiple images by gravitational field of mass concentrations like galaxies) have been used as cosmological probes. These techniques involve ratios of distances between the observers, lens, and source. DSPL systems involve two sources lensed by the same foreground mass concentration. They provide a unique cosmological geometric probe through distance ratios involving the source and lens. Cosmic acceleration has been described using a form of energy called dark energy. Previous work by my advisor has shown that the DSPL key distance ratio is nearly insensitive to lens modeling at low lens redshifts, unlike classic cosmological probes. This makes DSPL a great probe to study the dark energy equation of state, which determines the expansion history of the universe, at low lens redshifts. However, upcoming surveys, such as LSST and Euclid, are likely to find new DSPL systems at higher lens redshifts. Since no studies […]

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