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 10 of 10 for “"Filtered Images"”.
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A Comparison of five radiographic systems to D-speed film in the detection of artificial bone lesions
… percentage of cortical bone remaining. The Kodak filtered, Schick filtered, OpTime unfiltered, Schick unfiltered, and Dexis filtered images were significantly better at lesion detection compared to D-speed film. Also, all filtered digital images were significantly better at lesion detection than …
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Implementation of Directional Median Filtering using Field Programmable Gate Arrays
… median filtering have been proposed. The filtered images are smoothed along the direction of the filtering window. All implementations aimed to generate outputs in the least amount of time, while reducing the resource utilization on hardware. The implementation methods were designed for …
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Modulation transfer function measurements, image quality metrics, and subjective image quality for soft-copy color images
… of spatial frequency manipulation of color images and its impact on subjective image quality were examined by measuring subjective image quality and the changes in several prominent image quality metrics. The Modulation Transfer Function Area (M1F A), the Square Root Integral (SQRI), the …
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Digital image segmentation using periodic codings
… uniform grating functions are applied to the images in the spatial domain. Then, algorithms for finding the period and phase of a physical grating are explored for a hybrid optical-digital application of the method. Second, a model for textures as the linear superposition of periodic …
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An exploration of trypophobia
Images comprising clusters of objects can induce aversion and certain symptoms of anxiety, fear and disgust (so-called “trypophobia”) in about 13% of the population. This thesis is an investigation of the stimulus and response characteristics of the condition. First, a symptom questionnaire …
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Emergent design and image processing : a case study
… procedural image filters for still and moving images. Two interactive genetic programming systems for image filter evolution are described, GPI and evolution++, along with the Sol programming language that was used to create them. Results from the implementation and use of GPI and evolution++ …
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Effects of luminance, color, and spatial frequency variations on perceived image quality
… image processing software. With the manipulated images, an experiment was conducted in which subjects were asked to rate, on a 0.0 - 9.0 continuous scale, the perceived quality of a displayed image in comparison to the original image. Results of the statistical analysis of the collected data were …
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Flowable Fibrous Concrete For Thin Pavement Inlays
… contrast and shape-based filtering from the 3D images. The filtered images showed the number of fibers across any given vertical plane in a FFC specimen was directly correlated with the measured total fracture energy. Fibers located near a surface (cast or mold) within a boundary zone size …
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Detection and Localization of Linear Features Based on Image Processing Methods
… general problem of the detection of features in images is considered. One of the methods, the orientation detection of lines, utilized the Radon transform (sinogram) of an image to detect lines at different angles in an image. The line thickness algorithm was generated by finding a pattern formed …
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Investigation of new feature descriptors for image search and classification
… Understanding the semantics and contents of images for recognition remains one of the most difficult and prevailing problems in the machine intelligence and computer vision community. With large variations in size, pose, illumination and occlusions, image classification is a very challenging …