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 8 of 8 for “"Thresholding techniques"”.
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VIrginia Urban Dynamics Study Using DMSP/OLS Nighttime Imagery
… Urban patches were delineated by applying thresholding techniques based on digital number (DN) values extracted from DMSP/OLS imagery. Compounded Night Light Index (CNLI) values were calculated to help estimate GDP, and these processes were applied in a time series from 2000 to 2010. …
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Automatic image analysis methods for use with local operators
… and unbroken disconnected characters. Straight thresholding techniques do not always meet the performance requirements, but by applying simple image processing techniques some of these problems can be solved. However, more burden is placed on the users to control the image enhancement …
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Satellite Cloud Detection With Shortwave Channels: Algorithms, MISR Applications, and Three-Dimensional Radiative Effects
… is practically impossible through single thresholding techniques even when there is no background variability and no instrument noise. The consequences of cloud masking on cloud fraction and aerosol optical depth retrievals are significant. For aerosol optical depth retrievals, the biases …
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THRESHOLDING METHODS FOR LESION SEGMENTATION OF BASAL CELL CARCINOMA IN DERMOSCOPY IMAGES
… that have been applied to BCCs. Fifteen auto-thresholding techniques were implemented for BCC lesion segmentation; but, only five were selected for use in algorithm development. A novel technique was developed to automatically expand BCC lesion borders, to completely circumscribe the lesion. …
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Enhancing land seismic data with compressive sensing and processing
… However, high-resolution imaging subsurface techniques are challenging to apply for land seismic data. Unlike in marine acquisition where the source signal propagates through a near-homogeneous acoustic water layer, land acquisition places sources and receivers on a free-surface boundary …
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An investigation of a pattern recognition system to analyse and classify dried fruit
… upon pears were isolated using colour histogram thresholding techniques. The test results indicated that although colour classification was the major determinant in the grading of dried fruit, other characteristics of the fruit had to be incorporated to achieve successful final classification …
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Automated Segmentation and Analysis of High-Speed Video Phase-Detection Data for Boiling Heat Transfer Characterization Using U-Net Convolutional Neural Networks and Uncertainty Quantification
… Networks (CNNs) and uncertainty quantification techniques. The proposed methodology involves the development of specialized U-Net CNN models for segmenting HSV data of boiling phenomena in different fluids, including liquid nitrogen, argon, FC-72, and high-pressure water, under various …
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Design and Implementation of Complexity Reduced Digital Signal Processors for Low Power Biomedical Applications
… noise reduction scenario using the wavelet thresholding techniques. It is concluded that the proposed hybrid IIR/FIR wavelet filter banks provide better denoising performance, reduced computational complexity and power consumption in comparison to their IIR/IIR and FIR/FIR counterparts.