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Characterization of Multispectral Visible and X-ray CT Imagery of Hydromorphic Soils

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dc.contributor.advisor Heck, Richard John Tian, Tian 2016-09-09T20:06:03Z 2016-09-09T20:06:03Z 2016-08 2016-08-29 2016-09-09
dc.description.abstract In this project, semivariance analysis was applied on multispectral soil thin section imagery and X-ray CT imagery to delineate pedogenic variability of hydromorphic soils and for guiding object-based segmentation. Semivariogram indices were computed from multispectral visible channels to maximize the information obtained from optical light imaging of soil thin section images and multi-energy X-ray CT images. The use of dual angle cross polarization, in multispectral soil thin section imagery, is capable of extracting heterogeneous information. Object-based image segmentation showed satisfying result guided by semivariance analysis, under various scenarios regarding Gleysolic classification and horizonation. Particular mineral separation from soil matrix in CT greyscale images is challengeable according to soil composition complexity and the closeness of Hounsfield units of mineral oxidation. Based on relative attenuation in histograms of CT images obtained by multi-energy X-ray spectra, the suggestion of using multi-energy X-ray CT imagery is given to simplify material-specific segmentation. en_US
dc.description.sponsorship Natural Sciences and Engineering Research Council Discovery Grant. Chinese Scholarship Council en_US
dc.language.iso en en_US
dc.rights Attribution-NonCommercial-NoDerivs 2.5 Canada *
dc.rights.uri *
dc.subject multispectral imagery en_US
dc.subject multi-energy X-ray CT imagery en_US
dc.subject hydromorphic soils en_US
dc.subject semivariance analysis en_US
dc.subject object-based image segmentation en_US
dc.title Characterization of Multispectral Visible and X-ray CT Imagery of Hydromorphic Soils en_US
dc.type Thesis en_US Environmental Sciences en_US Master of Science en_US School of Environmental Sciences en_US
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Attribution-NonCommercial-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada