Inlämning av Examensarbete / Submission of Thesis

Christian Karlsson; Erik Sellberg MEE-0205, pp. 106. Inst för telekommunikation och signalbehandling/Dept. of Telecommunications and Signal Processing, 2002.

The work

Författare / Author: Christian Karlsson, Erik Sellberg
Titel / Title: LCD Optimized Image Enhancement
Abstrakt Abstract:

With the increased bandwidth in 3G terminals, the possibilities to make new exciting multimedia applications are enormous. Mobile devices generally uses small LCD:s with only a few gray-scales or colors. The goal for this master thesis will be to find ways to enhance and correct the images before they are shown on the LCD. Could this be done with algorithms who enhance the images automatically depending on which information the images have? It will also be necessary to consider the LCDs characteristic before enhancement of the images.

In this master thesis work it was discovered that sharpened and enhanced images with histogram modifications clearly improves the quality when displayed on the LCD. But it is also important to enhance the colors in the image, not only with color correction but also with dithering and quantization technique. Combining techniques like sharpening, color saturation and histogram modification gave clearly an improvement to the quality of the image and the result from the survey also pointed in this direction, the survey is published in appendix A. Some of the algorithms in histogram modification were used in an automatic enhancement and one of the algorithms worked with satisfaction. This histogram modification algorithm has been the basis for a patent application and we suggest a new outstanding performance histogram-modification method. The method cannot be described in this master thesis because the patent process is not finished.

Populärvetenskaplig beskrivning / Popular science summary: LCD optimerad digital bildbehandling. Hitta/föreslå algoritmer som kan optimera bilder för LCD skärmar med begränsad upplösning och färgdjup. /To Tran, ITS
Ämnesord / Subject: Signalbehandling - Signal Processing
Elektroteknik - Electrotechnology
Telekommunikation - Telecommunications
Nyckelord / Keywords: LCD, histogram, dithering, 2D signal processing

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram Telekommunikation och Signalbehandling/Masters progr. Telecom & Signal Proc.
Registreringsdatum / Date of registration: 09/16/2004
Uppsatstyp / Type of thesis: D-Uppsats/Magister/Master

Context

Handledare / Supervisor: To Tran BTH/ITS, Ted Hansson Ericsson Mobile Platforms
to.tran@bth.se
Examinator / Examiner: To Tran
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: Inst för telekommunikation och signalbehandling/Dept. of Telecommunications and Signal Processing
Inst för telekommunikation och signalbehandling S-372 25 Ronneby
+46 455 38 50 00
http://www.bth.se/its
I samarbete med / In co-operation with: Ericsson Mobile Platforms
Anmärkningar / Comments:

Detta exjobb är inlagt av:
To Tran
Blekinge Institute of Technology
Department of Telecommunications and Signal Processing
PO Box 520, SE-372 25 Ronneby
Sweden
Mobile. +46(0)733 64 84 50
to.tran@bth.se
www.bth.se/its

Files & Access

Bifogad uppsats fil(er) / Files attached: mee0205 - lcd optimized image enhancement.pdf (6048 kB, öppnas i nytt fönster)