LCD Optimized Image Enhancement
Independent thesis Advanced level (degree of Master (One Year))Student thesis
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.
LCD optimerad digital bildbehandling. Hitta/föreslå algoritmer som kan optimera bilder för LCD skärmar med begränsad upplösning och färgdjup. /To Tran, ITS
Place, publisher, year, edition, pages
2002. , 106 p.
LCD, histogram, dithering, 2D signal processing
Signal Processing Telecommunications Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:bth-3120Local ID: oai:bth.se:arkivex2E0DDFAF65B7C5D4C1256CE60061641FOAI: oai:DiVA.org:bth-3120DiVA: diva2:830419
BTH/ITS, To TranPlatforms, Ted Hansson Ericsson Mobile
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 firstname.lastname@example.org www.bth.se/its2015-04-222003-03-112015-06-30Bibliographically approved