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 20 of 25 for “"Image size"”.
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Fast Schemes for Video Denoising and Compressed Domain Image Size Change
… for obtaining a smaller or bigger version of an image when both the input and output images are in compressed format. This is accomplished by designing the down- and upsizing filters to take into account the specific symmetry and orthogonality properties of the transform used for compression. …
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Evaluation of changes in image appearance with changes in displayed image size
… focused on the quantification of changes in image appearance when images are displayed at different image sizes on LCD devices. The final results provided in calibrated Just Noticeable Differences (JNDs) on relevant perceptual scales, allowing the prediction of sharpness and contrast …
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Computer simulations to calculate energy flux and image size on a receiver for different reflector geometries using caustics
… project aims to connect solar energy flux and image size on the target to the ratio of aperture size and focal length of a model heliostat.
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An intelligent system for the classification and selection of novel and efficient lossless image compression algorithms
… growing rapidly; as a result of this growth, the image size is increasing, and alongside this increase comes the important challenge of saving these large-sized images and transferring them over networks. With the increase in image size, the interest in image compression is increasing as well, to …
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The impact of advertising and culture on the transformation of body image in Nigeria
… culture on the transformation of the ideal body image in Nigeria over a period of 25 years (1988-2013). The study contributes to knowledge of how culture and sociocultural factors may have an influence on overweight body size as ideal body image for Nigerians. The body has become a central part …
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Multi-Reference Pseudo-Random Phase-Encoded Joint Transfrom Correlation
… is used in one step to encode multiple reference images and at the same time eliminate false correlation peaks through power spectrum dispersion. A theoretical model of the implemented JTC is mathematically expressed and explained in this thesis. Basic performance criteria, PSR (peak to side lobe …
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Reduction and analysis of Vla maps for 281 radio-loud quasars using the Cray Y-Mp supercomputer
… of phase self-calibration. Maps were made with image size of 512 x 512. The A (C) array maps have 0.1 (1.3) arcsec cell sizes, with 0.1 to 0.2 (0.2 to 0.4) mJy/Beam rms noise and dynamic ranges of a few thousand. Radio positions and flux densities were measured, and contour maps were plotted. A …
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Image Quality Analysis Using GLCM
… help understand the details about the overall image content. The aim of this research is to investigate the use of the gray level co-occurrence matrix technique as an absolute image quality metric. The underlying hypothesis is that image quality can be determined by a comparative process in …
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Stereo Vision System Module for Low-Cost FPGAs for Autonomous Mobile Robots
… vision uses two adjacent cameras to create a 3D image of the world. A depth map can be created by comparing the offset of the corresponding pixels from the two cameras. However, for real-time stereo vision, the image data needs to be processed at a reasonable frame rate. Real-time stereo vision …
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Combined robust and fragile watermarking algorithms for still images. Design and evaluation of combined blind discrete wavelet transform-based robust watermarking algorithms for copyright protection using mobile phone numbers and fragile watermarking algorithms for content authentication of digital still images using hash functions.
… protection and content authentication for still images. New blind transform domain block based algorithms using one-level and two-level Discrete Wavelet Transform (DWT) were developed for copyright protection. The mobile number with international code is used as the watermarking data. The robust …
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On foveation of deep neural networks
… when the object is not shown in full. "Minimal images" are the smallest regions of an image that remain recognizable for humans. [26] show that a slight modification of the location and size of the visible region of the minimal image produces a sharp drop in human recognition accuracy. In this …
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Performance evaluation for different data encryption algorithms on wireless sensor network (WSN)
The Image Security primitives in the wireless sensor networks (WSN) are very energy intensive. Another problem in terms of energy consumption is added to the security of encrypted images transmitted by WSN sensor nodes. Therefore, the aim of the project is to analyse and evaluate various different …
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Fusion of Laser Range-Finding and Computer Vision Data for Traffic Detection by Autonomous Vehicles
… laser rangefinders to detect the location, size, and velocity of nearby objects. The Alasca units are designed for automotive use, and so they alone are able to identify nearby obstacles as vehicles with a high level of certainty. After some basic filtering, an object detected by the Alasca …
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Obstacle and Change Detection Using RGB Cameras
… detect any ob- stacles and changes on the test image paths in this study. This study introduces a dual- approach framework combining geometric and machine learning based approaches using par- allel Threadpooling architecture to detect obstacles and changes while reducing the training dataset by …
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The development of spatially-accurate reaching behaviour in early infancy
… from objects was increased, even if the retinal image size of the stimuli was held constant across changes in distance. A similar capacity for distance-appropriate adjustments to reaching attempts was found among fifteen-week-old infants in Experiment 2. Likewise, infants as young as fourteen …
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Aniseikonia: A Potential Barrier To Neural Plasticity
… initial treatment for amblyopia, which corrects image focus, but image size differences are often neglected. We aimed to identify the potential impact of aniseikonia by investigating current treatment outcomes in New Zealand children, measuring aniseikonia subjectively in amblyopia, and through …
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The development of spatially-accurate reaching behaviour in early infancy
… from objects was increased, even if the retinal image size of the stimuli was held constant across changes in distance. A similar capacity for distance-appropriate adjustments to reaching attempts was found among fifteen-week-old infants in Experiment 2. Likewise, infants as young as fourteen …
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Color image quality measures and retrieval
The focus of this dissertation is mainly on color image, especially on the images with lossy compression. Issues related to color quantization, color correction, color image retrieval and color image quality evaluation are addressed. A no-reference color image quality index is proposed. A novel …
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Emotional engagement and orienting: the effects of picture size on affective response
… between stimulus distance and retinal size, the present research was aimed at investigating the extent to which emotional modulation of distinct processes (action preparation, attentional capture, and subjective emotional state) is affected when reducing the retinal size of a picture. …
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