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• W1558625437 abstract "This thesis draws its hypothesis from the quantitative description of reflection and refractionof light at interfaces, given by the Fresnel theory. According to the theory, initiallyunpolarised light is partially polarised upon reflection from a smooth dielectric surface.Hence, variations in the polarisation properties of reflected and scattered light must indicatea change in properties of the reflecting surface. Assuming internal changes in refractiveindex can be neglected, any substantial change in the polarisation of light is thusindicative of a change in the material remitting the light. The contribution of this thesisis to develop a method for image segmentation based on surface material characteristics.The novel aspects of the method are the expression of intensity distribution as a function ofthe surface zenith and azimuth angles, and the expansion of this function using sphericalharmonics to estimate surface characteristics. The method begins with estimating shapefrom polarisation using the work of Atkinson and Hancock. The surface normals obtained are used in combination withpixel intensities to form a three dimensional function that describes intensity changes inthe image. This function is then expanded as a harmonic series and the constants of the expansionare used as features to characterize image regions and to segment the image basedon the hypothesis. Experimental evidence is presented through analysis of polarisationimages and segmentation of images of different objects." @default.
• W1558625437 created "2016-06-24" @default.
• W1558625437 creator A5072929050 @default.
• W1558625437 date "2010-04-01" @default.
• W1558625437 modified "2023-09-28" @default.
• W1558625437 title "Scene Segmentation Using Polarisation Information" @default.
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• W1558625437 hasPublicationYear "2010" @default.
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