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 6 of 6 for “"twin-image"”.
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Twin-image problems in optical scanning holography
… second part of this dissertation investigates twin-image noise in optical scanning holography. In optical scanning holography, holographic information of an object is generated by 2-D active optical scanning. The optical scanning beam can be a time-dependent Gaussian apodized Fresnel zone …
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Improving reconstructions of digital holograms
… using occlusions to reduce the effects of the twin image in reconstructions of DHs. Part A represents the major part of this thesis. Speckle reduction forms an important step in many digital holographic applications and we have developed a number of techniques that can be used to reduce its …
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Digital Hologram Image Processing
… we have made to the field of digital hologram image processing. In particular, we will deal with the processing of numerical reconstructions of real-world three-dimensional macroscopic objects recorded by in-line digital holography. Our selection of in-line digital holography over off-axis …
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Optical Scanning Holography for 3-D Imaging of Fluorescent Objects in Turbid Media
… and a digital decoding method for removing twin-image noise in optical scanning holography. The holographic method studied can be applied to 3-D biomedical imaging of fluorescent objects in turbid media as well as diffusely reflecting objects.
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Digital Holography and Optical Contouring
… such as: dominance of the zero order term, the twin image problem and excessive speckle noise.• Fibre-based systems linked to tunable lasers, including a comprehensive analysis of the effects of: signal attenuation, noise and laser instability within such systems.• Two-source arrangements for …
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Digital hologram recording systems: some performance improvements
… moving di�users can be performed to improve the image quality of the reconstructed images. A LabView based user friendly interface has been developed. � Novel methods based on space-time tradeo� and �xed point arithmetic have been developed and implemented for speed- ing up the reconstruction …