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.
Results
Showing 1 to 20 of 239 for “"blur"”.
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Afterimage Toon Blur : procedural generation of cartoon blur for 3D models in real time
… real time, construct non-photorealistic motion blur effects in the vein of 2D traditional animation. With these procedural techniques, designers can maximize the convenience of 3D models while still retaining an aesthetic normally constrained to 2D animation.
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Motion blur removal from photographs
… challenges in photography is motion blur. Blur artifacts are generated from relative motion between a camera and a scene during exposure. While blur can be reduced by using a shorter exposure, this comes at an unavoidable trade-off with increased noise. Therefore, it is desirable to …
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Adaptation to Interocular Differences in Blur
Adaptation to a blurred image causes a physically focused image to appear too sharp, and shifts the point of subjective focus toward the adapting blur, consistent with a renormalization of perceived focus. We examined whether and how this adaptation normalizes to differences in blur between the two …
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Ensemble Coding in Color and Blur Perception
… code. In a typical visual scene, both color and blur vary widely, and the average has important implications for representing visual norms (e.g. gray or focused) and visual function (e.g. to estimate the illuminant for color or the state of accommodation for blur). Yet whether and how the visual …
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Visual Evoked Potential Measures of Blur Adaptation
It has been shown previously that blur adaptation occurs when subjects view a blurry image with both eyes for a significant period of time (Webster, Georgeson, & Webster, 2002). There has been no quantitative data taken on the phenomenon of blur adaptation. This study aimed to study various blur …
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Modeling and Analysis of Optical Blur for Everyday Photography
Optical blur obscures image detail due to the camera's optics. The blur appearance depends on the scene's depth, wavelength, as well as the camera. The inference of such information --- optical calibration, image deblurring, and depth estimation -- is of great interest to computer vision. Existing …
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Characterizing the perceived quality degradation of still-camera motion blur
Camera motion blur was examined in two experiments, in an attempt to behaviorally validate candidate predictors of the associated degradation in photographic image quality. In the first experiment, motion of a hand-held 35-mm single-lens-reflex camera was measured using inertial sensors while film …
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Visual Performance in Pseudophakia. The Effect of Meridional Blur in Pseudoaccommodation.
… thesis is to evaluate the effect of meridional blur, using refractive induced astigmatism, on visual performance at far and close distances. Visual performance was evaluated using letter discrimination tasks at distance and near (visual acuity, VA) and a reading task at near on subjects with …
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A low-cost defocus blur module for video rate quantified 3D imaging
Existing three-dimensional surface imaging systems are expensive, difficult to use, time consuming, and do not always provide the best accuracy or resolution. By using an offset aperture on a rotating disc, the 3D Monocular Imaging System provides a fast, portable, accurate, and cheap method of 3D …
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Functional aspects of blur adaptation in human vision. A study of the mechanism of blur adaptation in human vision - its origin and scope evidenced using subjective and objective procedures.
Sensory adaptation to blur improves visual acuity under defocused conditions. This phenomenon has been successfully demonstrated using subjective measures of acuity and is known as blur adaptation. This study investigates aspects of the mechanism of blur adaptation in human vision using subjective …
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Estimation of Defocus Blur in Virtual Environments Comparing Graph Cuts and Convolutional Neural Network
… and AR, self-driving cars etc. Using the defocus blur of a camera lens is one of the methods of depth estimation. In this thesis, we have researched this technique in virtual environments. Virtual datasets have been created for this purpose. In this research, we have applied graph cuts and …
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The impact of simulated motion blur on breast cancer detection performance in full field digital mammography (FFDM)
… the image acquisition phase and subsequent image blurring is an unfortunate occurrence in some FFDM images. The research detailed in this thesis seeks to understand the impact of motion blur on cancer detection performance in FFDM images using novel software to perform simulation of motion, an …
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Emerging out of the “blur”: exploration, evaluation and significance of 3D N-glycans’ structure through molecular dynamic studies
Glycosylation is the most abundant and diverse post-translational modification of proteins, contributing to protein folding, trafficking, structural stability and dynamics, and function. Complex N-glycans are a class of glycans found in eukaryotes, sharing a common pentasaccharide core structure. …
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Depth From Defocused Motion
Motion in depth and/or zooming causes defocus blur. This work presents a solution to the problem of using defocus blur and optical flow information to compute depth at points that defocus when they move. We first formulate a novel algorithm which recovers defocus blur and affine parameters …
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The Effects of Binocular Vision Impairment on Adaptive Gait. The effects of binocular vision impairment due to monocular refractive blur on adaptive gait involving negotiation of a raised surface.
… induced by acutely presented monocular blur, both young and elderly subjects adopted a safety strategy of increasing toe clearance of the step edge, even at low levels of monocular blur (+0.50DS) and the effect was greater when the dominant eye was blurred. The same adaptation was not …
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Transformation Tolerance of Facial Recognition Technology and Informative Evaluation Metrics
… are characterized as a function of Gaussian blur strength, intersecting with color variation. The performance-blur relationship is modeled as an s-curve, creating a highly interpretable format for discussion. Blur strength was consistently statistically significant to performance, but color …
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Image enhancement methods and applications in computational photography
… focus stacking, super-resolution, motion deblurring and so on. Although extensive work has been done to explore image enhancement techniques in each subfield of computational photography, attention has seldom been given to study of the image enhancement technique of simultaneously extending …
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Reactive Motions In A Fully Autonomous CRS Catalyst 5 Robotic Arm Based On RGBD Data
… to perform velocity estimation using motion blur in a single image frame along x and y axes in the camera coordinate system and intercept a moving object with a robotic arm. It will be shown that velocity estimation in a single image frame improves the system's performance. The majority of …
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Estimation de l'échelle absolue par vision passive monofocale et application à la mesure 3D de néoplasies en imagerie coloscopique
… system relies on two novel technical modules: Blur-Estimating Tracking (BET) and Blur-Model Fitting (BMF). BET allows us to simultaneously track an area of interest and estimate the optical blur information. BMF allows us to robustly extract the IB by fitting an optical blur model to the blur …
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