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 430 for “"digital image"”.
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Digital image compression.
… which increase the definition of the compressed image and reduce the overall mean square error. Two novel systems are proposed for image compression. The first is a bit plane image coding system based on a hierarchic quadtree structure in a transmission domain, using the Hadamard transform as a …
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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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Digital image transformation and compression
… optimal compression methods for high quality images where no visual distortion is essential. The need for such algorithms is great, particularly for satellite, medical and motion picture imaging. In these situations any degradation in image quality is unacceptable, yet the resolutions of the …
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RST invariant digital image watermarking
Digital image watermarking has been proposed as a method to ensure the copyright protection and credibility of images by means of embedding a known piece of digital data into host images. To be useful, a good watermarking scheme should be robust against all known attacks to a certain degree based …
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Security sphere : digital image processing
Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Advanced techniques for digital image processing
… algorithm for enhancing a degraded grey scale image is proposed here. The enhancement algorithm is a locally adaptive Fourier filter which locates and analyzes the Fourier spectral information and then enhances the identifying features. Thus, it can achieve a better enhancement result than …
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DIGITAL IMAGE PROCESSING OF LANDSAT IMAGERY
… useHn capturing and storing remotely sensed images. Since LANDSAT II MSS data is being used in this study, the LANDSAT MSS system and calibration was discussed. An attempt is made to reduce radiometric errors in the data that were caused by decimal truncation during NASA's initial …
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An interactive digital image processing system
Thesis. 1975. B.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Digital image segmentation using periodic codings
Digital image segmentation using periodic codings is explored with reference to two applications. First, the application of uniform periodic codings, to the problem of segmenting the in-focus regions in an image from the blurred parts, is discussed. The work presented in this part extends a …
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Digital image compression on parallel computer architectures
… application of parallel processing techniques to digital image compression. Digital image compression is used to reduce the number of bits required to store an image in computer memory and/or transmit it over a communication link. Over the past decade advancements in technology have spawned many …
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Scale and texture in digital image classification
… and empirical study on textural properties of digital images. Spatial information exists at a hierarchy of scales and texture is a consequence of the objects in that hierarchy. Within-class texture results from the spatial arrangement of objects at the next finer level in the hierarchy than the …
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Children's Color Association for Digital Image Retrieval.
… of information resources, such as books, images and films. As a subset of information retrieval research, content-based image retrieval systems automatically abstract elementary information from images in terms of colors, shapes, and texture. Color is the most commonly used in similarity …
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Image statistical frameworks for digital image forensics
The advances of digital cameras, scanners, printers, image editing tools, smartphones, tablet personal computers as well as high-speed networks have made a digital image a conventional medium for visual information. Creation, duplication, distribution, or tampering of such a medium can be easily …
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An investigation of digital image compression techniques
By its nature, digital image data contains redundant information which, if removed, can reduce the amount of bandwidth required to transmit it, or reduce the space required to store it. In this thesis the characteristics of image data that give rise to redundancy, and one technique that can be used …
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Designing hypothesis tests for digital image matching
Image matching in its simplest form is a two class decision problem. Based on the evidence in two sensed images, a matching procedure must decide whether they represent two views of the same scene, or views of two different scens. Previous solutions to this problem were either based on an intuitive …
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SIP : a smart digital image processing library
The Smart Image Processing (SIP) library was developed to provide automated real-time digital image processing functions on camera phones with integer microprocessors. Many of the functions are not available on commercial camera phones and some are not found even in desktop image processing …
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Topographic classification of digital image intensity surfaces
… the underlying grey tone intensity surface of a digital image. Each picture element is independently classified and assigned a unique descriptive label, invariant under monotonically increasing grey tone transformations, from the set {peak, pit, ridge, ravine, saddle, flat, and hillside}, with …
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Applications of Smalltalk/V to digital image processing
… Smalltalk as a medium for explorations in image processing by creating within it an expandable environment for image processing. He has produced two versions: one for DOS, and one for Windows which is hereafter referred to as ImageLab. The Windows version, ImageLab, may be used in two ways: …
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A robust region-adaptive digital image watermarking system
Digital image watermarking techniques have drawn the attention of researchers and practitioners as a means of protecting copyright in digital images. The technique involves a subset of information-hiding technologies, which work by embedding information into a host image without perceptually …
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Design of a real time digital image correlator
This thesis presents the design of a real time digital image correlator circuit The circuit accepts images in real time from two video sources, with one video source serving as a reference with which images from the second video source are compared. The proposed circuit extracts a reference window …
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