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 158 for “"digital images"”.
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Progressive transmission of digital images
… produce very large data sets and associated images requiring large bandwidths or extended times to transmit. Other techniques have been proposed to compress and sort an image to send the most significant portions of the image first, allowing the user to choose the amount of compression …
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Review of steganalysis of digital images
… to identify if there is data hidden inside a digital medium. In this study, some specific steganographic schemes such as HUGO and LSB are studied and the steganalytic schemes developed to steganalyze the hidden message are studied. Furthermore, some new approaches such as deep learning and …
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Automated interpretation of digital images of hydrographic charts.
… of research into the automated generation of a digital database of hydrographic charts is presented. Low level processing of digital images of hydrographic charts provides image line feature segments which serve as input to a semi-automated feature extraction system, (SAFE). This system is able …
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Forensic research on detecting seam carving in digital images
Digital images have been playing an important role in our daily life for the last several decades. Naturally, image editing technologies have been tremendously developed due to the increasing demands. As a result, digital images can be easily manipulated on a personal computer or even a cellphone …
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Signal Processing for Joint Source -Channel Coding of Digital Images
… to developing novel stochastic models for images, investigating the information theoretic performance bounds for them, and designing efficient learning and inference methods for the proposed models. Unlike the commonly accepted approach in which the design of communication systems is …
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Deep learning-based seagrass detection and classification from underwater digital images
… severe effects on the quality of underwater images. Besides low contrast, colour distortion and bright specks affect the quality of underwater images. In this thesis, we focus on the problem of single to multi-species seagrass classification and detection from underwater digital images. We …
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Data comparison schemes for Pattern Recognition in Digital Images using Fractals
Pattern recognition in digital images is a common problem with application in remote sensing, electron microscopy, medical imaging, seismic imaging and astrophysics for example. Although this subject has been researched for over twenty years there is still no general solution which can be compared …
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Quantization of multiresolution transform coefficients for high compression of digital images
… methods is in the area of image compression. Digital image compression is currently of high interest in computer science. The growing demand for images in computers has grown faster than the technology and thus solutions are sought. This work deals with the problem of quantization of resultant …
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A New Tool for Rock Mass Discontinuity Mapping from Digital Images: VTtrace
… on image processing and analysis techniques. Images of a rock exposure surface are made using a "prosumer" grade digital camera. The grayscale images are preprocessed to remove color information and any noise or distortion. The smoothed images are converted into binary images. The binary …
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Design and analysis of Discrete Cosine Transform-based watermarking algorithms for digital images. Development and evaluation of blind Discrete Cosine Transform-based watermarking algorithms for copyright protection of digital images using handwritten signatures and mobile phone numbers.
… algorithms for copyright protection of digital still images using handwritten signatures and mobile phone numbers. The new algorithms take into account the perceptual capacity of each low frequency coefficients inside the Discrete Cosine Transform (DCT) blocks before embedding the …
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Design and analysis of Discrete Cosine Transform-based watermarking algorithms for digital images. Development and evaluation of blind Discrete Cosine Transform-based watermarking algorithms for copyright protection of digital images using handwritten signatures and mobile phone numbers
… algorithms for copyright protection of digital still images using handwritten signatures and mobile phone numbers. The new algorithms take into account the perceptual capacity of each low frequency coefficients inside the Discrete Cosine Transform (DCT) blocks before embedding the …
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Classification of cured tobacco leaves by colour and plant position by means of computer processing of digital images
… of flue-cured Virginia tobacco by means of digital processing of tobacco leaf images. With reference to international grading standards and to modem image processing techniques, two classifiers are designed. The colour classifier uses seven features extracted from each leaf image to grade …
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Integrating digital images into computer-based instruction: adapting an instructional design model to reflect new media development guidelines and strategies
… the development issues confronted when digital video is selected as an integral component of computer-based applications. Practitioners wishing to develop their own instructional materials (particularly those which incorporate digital video) are provided few specific details for creating …
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Image Compression by Wavelet Transform.
<p>Digital images are widely used in computer applications. Uncompressed digital images require considerable storage capacity and transmission bandwidth. Efficient image compression solutions are becoming more critical with the recent growth of data intensive, multimedia-based web applications.</p> …
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Digital image forensics
Digital image forensics is a relatively new research field that aims to expose the origin and composition of, and the history of processing applied to digital images. Hence, the digital image forensics is expected to be of significant importance to our modern society in which the digital media are …
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Investigation of the effects of image compression on the geometric quality of digital protogrammetric imagery
We are living in a decade, where the use of digital images is becoming increasingly important. Photographs are now converted into digital form, and direct acquisition of digital images is becoming increasing important as sensors and associated electronics. Unlike images in analogue form, digital …
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Automated Detection of Maternal Vascular Malperfusion Lesions in Human Placentas Diagnosed with Preeclampsia and Fetal Growth Restriction Using Machine Learning
… (ML) feature extraction methods to classify digital images of placental histopathology specimens, collected from PE, FGR, PE + FGR, and healthy pregnancies, according to the presence or absence of MVM lesions. 166 digital images were captured from histological placental specimens, manually …
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