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 13 of 13 for “"scene content"”.
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The effect of scene content on image quality
… perform well on individual ‘average looking’ scenes and test targets, but provide lower correlation with subjective assessments when working with a variety of scenes with different than ‘average signal’ characteristics. This study considers the issues of scene dependency on image quality. This …
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The Effects of Domain Knowledge and Scene Content on Change Detection Using a Change Blindness Paradigm
… designed to determine how domain knowledge or scene content affects change detection. Twenty-four participants of medical professionals and non-medical professionals performed a change detection task using a flicker paradigm intended to be similar to saccadic movements or blinks. Each …
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Image usefulness of compressed surveillance footage with different scene contents
… (HVS and automated) were assessed with defined scene content properties, and video compression, i.e. H.264/MPEG-4 AVC. The performance of imaging systems/processes (e.g. subjective investigations, performance of compression algorithms) are affected by scene content properties. No other …
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Programmable Aperture Photography: An investigation into applications and methods
… patterns differ depending on application, scene content or imaging conditions and thus would need to be changed quickly and frequently. This dissertation proposes the design and development of a programmable aperture photography camera. The camera makes use of a liquid crystal display (LCD) …
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An Approach to Automatic Selection of the Optimal Local Feature Detector
… varying image changes and in relation to the scene content is investigated. The results obtained through analysis allowed to make the first but important step towards a fully adaptive selection method of the optimal feature detector for any given operating condition.
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Scene-Dependency of Spatial Image Quality Metrics
… to characteristics of the input signal (i.e. the scene being captured). This behaviour renders system performance “scene-dependent” and difficult to measure accurately. The MTF and NPS are traditionally measured from test charts containing suitable predefined signals (e.g. edges, sinusoidal …
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Optimum magnification and perspective for non-single-lens-reflex camera systems
… The magnification and perspective of four scenes were varied by recording each scene with each of six camera-lens focal lengths (28 mm, 35 mm, 50 mm, 70 mm, 85 mm, and 105 mm) from each of six distances. The distances revolved around a reference distance depending on scene content. The …
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Adapting Single-View View Synthesis with Multiplane Images for 3D Video Chat
… better predict a layered representation of the scene viewed by either video chat participant at any given time. This intermediate representation of the local light field — called a <em>Multiplane Image</em> (MPI) — may then be used to rerender the scene at an arbitrary viewpoint which, in our …
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Preferred levels of image sharpness and their relation to image structure in thermal dye transfer prints
… image sharpness may be somewhat dependent upon scene content, participants always preferred a small amount of sharpening to none at all. For all conditions examined, stimuli that received no sharpening were the least preferred. In relating interval scales to an objective measure of image …
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Large databases of real and synthetic images for feature evaluation and prediction
… matching to panorama stitching to object and scene recognition. They exploit image regularities to capture structure in images both locally, using a patch around an interest point, and globally, over the entire image. Image features need to be distinctive and robust toward variations in scene …
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The impact of water and anthropogenic objects on implicit evaluations of natural scenes: a restorative environments perspective
… Among natural landscapes, aquatic (blue space) scenes are among the most preferred and psychologically restorative. Since such landscapes face an increasing range of demands, there is a need to understand how their restorative qualities arise and might be preserved, both in terms of the content …
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Camera Spatial Frequency Response Derived from Pictorial Natural Scenes
… how accurately the image represents the scene, including measurements of colour accuracy, tone reproduction, geometric distortions, and image noise evaluation. The research conducted in this thesis focuses on the Modulation Transfer Function (MTF), a widely used camera performance …