Molecular Biotechnology Programme Uppsala University School of Engineering UPTEC X 02 29
Date of issue 2002-02 AuthorAnna Liberg
Title (English)
Video enhancement by colour and contrast correction
Title (Swedish)
Video enhancement genom färg- och kontrastkorrektion Abstract
This report investigates an original approach to video colour and contrast enhancement for a consumer digital video camera. The contrast correction uses a S-shaped non-linear pixel transformation. It takes visual acuity into account, and modifies badly exposed images and brings back colour. The colour enhancement is based on the assumption that saturated colours increase perceived image quality. The algorithm combines scaling and polarization of chroma to achieve optimal colourfulness and thereby perceived colour quality. Indeed, the resulting application gives a robust and pleasing result and works in real-time for video.
Keywords
Video enhancement, image enhancement, contrast, colour, digital camera.
Supervisors
Prof. Dr. Touradj Ebrahimi
Signal Processing Laboratory, Swiss Federal Institute of Technology Examiner
Dr. Mats Gustafsson
Signaler och system, Uppsala University
Project name Sponsors
Genimedia SA, Lausanne Language
English
Security
ISSN 1401-2138 Classification
Supplementary bibliographical information Pages
79
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