Disertace

Ph.D.

UTIA AV CR

Pod Vodarenskou vezi 4, 182 08 Praha 8

2010

Mgr. Pavel Vácha, Ph.D. (ÚTIA - Oddělení rozpoznávání obrazů)

texture, illuminatin invariants, rotation invariants, Markov

Ongoing expansion of digital images requires new methods for sorting, browsing, andsearching through huge image databases. This is a domain of Content-Based Image Retrieval (CBIR) systems, which are database search engines for images. A user typically submit a query image or series of images and the CBIR system tries to find and to retrieve the most similar images from the database. Optimally, the retrieved images should not be sensitive to circumstances during their acquisition. Unfortunately, the appearance of natural objects and materials is highly illumination and viewpoint dependent. This work focuses on representation and retrieval of homogeneous images, called textures, under the circumstances with variable illumination and texture rotation. We propose a novel illumination invariant textural features based on Markovian modelling of spatial texture relations.