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 9 of 9 for “"Edge enhancement"”.
-
Near real-time early cancer detection using a graphics processing unit
… to speed up processing, this method also applied edge enhancement via Gaussian Fuzzy Edge Enhancement. After edge enhancement, multiple thresholds (or tuning variables) were identified and adjusted to reduce computational requirements, decrease false positives and increase the accuracy of …
-
Capabilities and limitations of Phase Contrast Imaging techniques with X-rays and neutrons
… capabilities. We develop a model to explain the edge enhancement observed with those systems; our results suggest that scatter reduction is the process responsible for the observed edge enhancement. We performed experiments that show good agreement with the model. Coded Source Imaging (CSI) is …
-
Using virtual reality to investigate the visual features that determine the effectiveness of disruptive camouflage
… and prevent detection and possibly recognition. Edge enhancement (EE) is a phenomenon sometimes found alongside disruptive camouflage, where the contrast between two intersecting patches is accentuated. EE may aid in concealment by more closely matching shadowed environments or by inducing false …
-
Perceptual refinement for hierarchical radiosity
… for human perception. We used a model of the edge enhancement properties of the human visual system to produce a perceptually based refinement oracle for the hierarchical radiosity algorithm. Tests of the perceptual oracle shows that it allows the hierarchical radiosity algorithm to produce …
-
Astronomical image manipulation in the transform domain
… is developed. In particular, new methods for edge enhancement and minimum (MIN)/maximum (MAX) gray scale intensity estimation in the DCT domain are proposed. Algebraic operations and image interpolation in the DWT domain are addressed. The superiority of new algorithms over the conventional …
-
A Hierarchical Image Processing Approach for Diagnostic Analysis of Microcirculation Videos
Knowledge of the microcirculatory system has added significant value to the analysis of tissue oxygenation and perfusion. While developments in videomicroscopy technology have enabled medical researchers and physicians to observe the microvascular system, the available software tools are limited in …
-
Computed tomography of the thorax and abdomen of the clinically normal common marmoset (Callithrix jacchus)
… i.v. contrast. A high frequency algorithm with edge enhancement proved to be particularly beneficial for the evaluation of thoracic and to a lesser degree abdominal CT. Due to their size and species specific anatomy (also reflected in their different normal range of HU of individual organs), …
-
Geological and structural analysis of the Hwange area-Northwest Zimbabwe: using remotely sensed data and geographic information systems (GIS)
… fractures in the Karoo rocks. Landsat TM image enhancement techniques such as principal components analysis, edge enhancement, decorrelation stretching, band ratios; and colour composites made following these techniques, allowed mapping of different lithological units and discrimination between …
-
Vision based methodology for evaluation of meat quality characteristics : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… in image pre-processing was background removal. Edge enhancement, filtering and/or sharpening techniques were then used to remove any noise present and to enhance the visual quality of the images. Proper segmentation algorithms are very important for a successful vision system. Colour, brightness …