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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Optimal registration of deformed images /

Broit, Chaim. January 1981 (has links)
Thesis (Ph. D.)--University of Pennsylvania, 1982. / Includes index and bibliographic references.
2

Visual to tactile conversion theory

Krufka, Stephen Edward. January 2006 (has links)
Thesis (M.E.E.)--University of Delaware, 2006. / Principal faculty advisor: Kenneth E. Barner, Dept. of Electrical and Computer Engineering. Includes bibliographical references.
3

Color bit-depth expansion for contour removal and demosaicking of spatial varying exposure array for high dynamic range image capturing /

Cheng, Cheuk Hong. January 2009 (has links)
Includes bibliographical references (p. 94-95).
4

Surface modelling for 2D imagery

Lieng, Henrik January 2014 (has links)
Vector graphics provides powerful tools for drawing scalable 2D imagery. With the rise of mobile computers, of different types of displays and image resolutions, vector graphics is receiving an increasing amount of attention. However, vector graphics is not the leading framework for creating and manipulating 2D imagery. The reason for this reluctance of employing vector graphical frameworks is that it is difficult to handle complex behaviour of colour across the 2D domain. A challenging problem within vector graphics is to define smooth colour functions across the image. In previous work, two approaches exist. The first approach, known as diffusion curves, diffuses colours from a set of input curves and points. The second approach, known as gradient meshes, defines smooth colour functions from control meshes. These two approaches are incompatible: diffusion curves do not support the local behaviour provided by gradient meshes and gradient meshes do not support freeform curves as input. My research aims to narrow the gap between diffusion curves and gradient meshes. With this aim in mind, I propose solutions to create control meshes from freeform curves. I demonstrate that these control meshes can be used to render a vector primitive similar to diffusion curves using subdivision surfaces. With the use of subdivision surfaces, instead of a diffusion process, colour gradients can be locally controlled using colour-gradient curves associated with the input curves. The advantage of local control is further explored in the setting of vector-centric image processing. I demonstrate that a certain contrast enhancement profile, known as the Cornsweet profile, can be modelled via surfaces in images. This approach does not produce saturation artefacts related with previous filter-based methods. Additionally, I demonstrate various approaches to artistic filtering, where the artist locally models given artistic effects. Gradient meshes are restricted to rectangular topology of the control meshes. I argue that this restriction hinders the applicability of the approach and its potential to be used with control meshes extracted from freeform curves. To this end, I propose a mesh-based vector primitive that supports arbitrary manifold topology of the mesh.
5

Multilevel halftoning over hexagonal grids

Liu, Chen. January 2006 (has links)
Thesis (M.E.E.)--University of Delaware, 2006. / Principal faculty advisor: Gonzalo R. Arce, Dept. of Electrical and Computer Engineering. Includes bibliographical references.
6

Automatic boundary extraction in medical images based on constrained edge merging

Zhao, Guang, January 2000 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 97-100).
7

Video cosmetics : digital removal of blemishes from video /

Tsoi, Yau Chat. January 2003 (has links)
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 83-86). Also available in electronic version. Access restricted to campus users.
8

Analysis and design of vector error diffusion systems for image halftoning /

Damera-Venkata, Niranjan, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 89-95). Available also in a digital version from Dissertation Abstracts.
9

High resolution visualization of large scientific data sets using tiled display /

Carter, Caleb, January 2007 (has links) (PDF)
Thesis (M.S.) in Computer Engineering--University of Maine, 2007. / Includes vita. Includes bibliographical references (leaf 104).
10

Object-based coding and transmission for plenoptic videos

Wu, Qing, January 2008 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2008. / Also available in print.

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