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.
Results
Showing 1 to 20 of 168 for “"Luminance"”.
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Acuity, Luminance and Monocular Deprivation in the Cat.
Hubel and Wiesel (1970) described a "critical period" in the developing visual system of the cat extending from birth through the first three to four months of life based upon the ocular dominance condition of cortical neurons in monocularly deprived (MD) cats. Monocular deprivation during this …
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Saturation and luminance control in color image processing
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1982
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Contrast Sensitivity to One- and Two-Dimensional Luminance Patterns
… sensitivities to one- and two-dimensional luminance patterns were compared in a two-alternative forced choice (2AFC) experiment. Space-averaged luminance was also manipulated. Statistical analyses revealed a main effect of stimulus dimension (p < .05) and no effect of space-averaged …
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Successive Contrast Involving Luminance and Purity Alterations of the Ganzfeld
Made available in DSpace on 2014-12-03T23:51:26Z (GMT). No. of bitstreams: 1 6303357.pdf: 2534323 bytes, checksum: d6666173eab9d925ba6dae63de91ca6e (MD5) Previous issue date: 1962
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Interactions of luminance, color and motion in the visual system
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1992.
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Display spatial luminance nonuniformities: effects on operator performance and perception
… examined the effects of display spatial luminance nonuniformities on operator performance and perception. The objectives of this research were to develop definitions of nonuniformity, develop accurate measurement techniques, determine acceptable levels of nonuniformities, and to develop a …
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Sunlight readability and luminance characteristics of light-emitting diode push button switches.
… for six attributes of lighting quality: average luminance and power consumption at full voltage, sunlight readable contrast, luminance contrast under ambient sunlight, legend uniformity, and dual-color uniformity. Three of the four manufacturers have not developed LED push button switches that …
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Effects of luminance, color, and spatial frequency variations on perceived image quality
… to investigate the effects of varying levels of luminance, color, and spatial frequency content on the perceived image quality of a soft-copy color image. A secondary objective was to test the robustness of selected image quality metrics (MTFA, SQRI, and ICS) to the color variations as measured …
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Effects of instrument panel luminance and hue on simulator driving performance and driver preferences
Twenty-four subjects, each having a valid Virginia driver's license (males and females of ages from 20 to 73), read aloud words presented on two displays while driving a simulated vehicle in night-time conditions. The words, emulating printed legends found on automobile instrument panels, were …
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Determination of Chromatic and Luminance Channels in the Zebrafish Visual System Using an Increment Threshold Technique
… possesses anatomically separate chromatic and luminance channels; these pathways are responsible for the visual coding of color and brightness information, respectively. In lower vertebrates, such as the zebrafish (Danio rerio), there does not appear to be any anatomical separation of cell …
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Effects of color CRT misconvergence and display luminance on reading performance and perceived image quality judgments
… effects of color CRT misconvergence and display luminance on reading performance and perceived image quality. The objectives of this study were (1) to determine the effects of color CRT misconvergence on reading time and errors, (2) to determine the effects of color CRT misconvergence on …
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The effects of luminance contrast, raster modulation, and ambient illumination on text readability and subjective image quality
This thesis examined the effects of luminance contrast, raster modulation, and ambient illumination on readability and image quality of text presented on a CRT display. Participants read a Tinker Speed of Reading text passage on the monitor and then responded when they found the out-of-context word …
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The Effects of Stimuli Type, Size, and Articulation on Estimating the Luminance Contrast of Real and CRT Targets
The goal of this thesis was to examine how luminance contrast estimates were affected by varying conditions of stimuli type, size, and articulation. Based on previous research, it was expected that lightness constancy would increase as stimuli moved from a spotlight, to paper, and finally to a CRT …
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Effects of illuminance, luminance, viewing angle, and screen test pattern on the perception of flicker in CRT displays
… purpose of this research was to determine how illuminance, luminance, screen test pattern, and viewing angle affect the perception of flicker in a CRT, especially in relation to the flicker evaluation method in the ANSI/HFS 100-1988 standard. Twenty participants viewed a CRT at different viewing …
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Effects of target size, luminance contrast, and illumination on visual target detection and recognition with AN/AVS-6 goggles
… research examined the effects of target size, luminance contrast, and illumination level on visual target detection and recognition while using AN/AVS-6 night vision goggles. Vehicle silhouette targets were rear-projected on random screen positions under various levels of illumination, …
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PLED Enhancement and Re-use
… or thermal annealing, to improve pristine device luminance and efficiency. The project also examines substrate re-use techniques to repair ITO substrate damage, and effects of polymer aging on PLED luminance and efficiency. PLEDs fabricated with polymer aged to varying degrees exhibit increased …
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Ocular dominance and temporal dynamics in the venetian blind effect
… for stereopsis, but disparities in contrast and luminance can also lead to the perception of depth and both can cancel perceived depth from a geometric disparity. Humans are able to perceive changes in depth from contrast disparities at frequencies up to approximately 1.4 Hz, whereas changes in …
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Subjective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard
… Class II because the Large Source, Screen Image Luminance Ratio (LR BDS/FDS) and the Specular Reflection Luminance Ratio (LR BDS/BD) always passed. Conversely, negative polarity always produced Class II or Class III because the Small Source, Specular Reflection Luminance Ratio (LR BDS/BD) failed …
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