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 “"vignetting"”.
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Application of beam shaping in second-harmonic generation microscopy
… imaging configuration to reduce intensity-based vignetting. The uniform illumination is obtained with a flat-top beam (FTB) that provides a comparatively higher two-photon excitation signal-to-noise ratio (SNR) distribution, as well as a reduction in the number of dark areas for a rectangular …
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High Dynamic Range and Omnifocus Imaging
… adds to those of more familiar cosine-fourth and vignetting effects.
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Dark Matter Detection with the Dark Matter Time Projection Chamber Collaboration
… the radial decrease in image intensity (termed “vignetting”) for the CCD/lens system used in DMTPC’s directional detector at Bryn Mawr College. Additionally, we describe the work involved in setting up this detector, including upgrading the time projection chamber hardware and designing a …
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THRESHOLDING METHODS FOR LESION SEGMENTATION OF BASAL CELL CARCINOMA IN DERMOSCOPY IMAGES
… algorithms, which included solutions for image-vignetting correction and border expansion, to achieve dermatologist-like borders, provided more inclusive and therefore, feature-preserving border detection, favoring better BCC classification accuracy, for future work.
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Engineering upgrades to the Motional Stark Effect diagnostic on Alcator C-Mod
… at NA = 0.6. The polychromator is imaging, non-vignetting, high transmission, utilizes mostly off-the shelf optics, is easily aligned, remote-controlled and can be replicated at relatively low cost. This enables wavelength-interpolation of the mse background light and simultaneous detection of …
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Kalibrace vinětace širokoúhlého objektivu
Tato bakalářská práce se zabývá problematikou vinětace u širokoúhlých objektivů, která způsobuje ztmavení okrajových částí obrazu a ztrátu obrazové informace. Cílem práce je navrhnout a implementovat alternativní metodu korekce vinětace, která eliminuje potřebu přímého snímání rozsáhlého …