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Perceptual artifacts associated with novel display technologies


Stereoscopic 3D displays are able to provide an added sense of depth compared to traditional displays by sending slightly different images to each eye. Although stereoscopic displays can provide a more immersive viewing experience, existing methods have drawbacks that can detract from image quality and cause perceptual artifacts. In this thesis I investigate perceptual artifacts associated with displays, and propose novel techniques that can improve viewing experience compared to existing methods. Chapter 1 presents a broad introduction to the various types of artifacts that can occur in displays, including motion artifacts, depth distortion, flicker, and color breakup. In Chapter 2, I describe a novel display technique, "spatiotemporal interlacing," that combines spatial and temporal interlacing. I demonstrate using psychophysics that this method provides a better viewing experience than existing methods, and I present a computational model that confirms the psychophysical data. In Chapter 3, I present an investigation of perceptual artifacts on a high-frame-rate (240Hz) temporally interlaced OLED display. The high frame rate of this display allows for several unique driving modes. I investigated the perceptual consequences of these driving modes, characterizing the display in terms of motion, depth distortion, flicker, spatial resolution, and luminance. I demonstrate how one's selection of viewing mode can tailor the viewing experience depending on the goals of viewer. Chapter 4 discusses the phenomenon of color breakup, a perceptual artifact that occurs in displays that present colors sequentially in time, such as Digital Light Processing (DLP) projectors. I discuss a novel psychometric procedure to measure the artifact, and a way to model the saliency of the artifact based on known spatiotemporal properties of the human visual system. I also propose a method for reducing color breakup.

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