Search for dissertations about: "Image databases"

Showing result 1 - 5 of 66 swedish dissertations containing the words Image databases.

2. 1. Group-Theoretical Structure in Multispectral Color and Image Databases

   Author : Thanh Hai Bui; Reiner Lenz; Björn Kruse; Jinhui Chao; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; group theory; PCA Principal Component Analysis ; CBIR; Content-based Image Retrieval ; filter; color; image; multispectral; database; Signal processing; Signalbehandling;

   Abstract : Many applications lead to signals with nonnegative function values. Understanding the structure of the spaces of nonnegative signals is therefore of interest in many different areas. Hence, constructing effective representation spaces with suitable metrics and natural transformations is an important research topic. READ MORE

4. 2. Topics in Content Based Image Retrieval : Fonts and Color Emotions

   Author : Martin Solli; Reiner Lenz; Jan Erik Solem; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; image analysis; content based image retrieval; font recognition; color emotions; Image analysis; Bildanalys;

   Abstract : Two novel contributions to Content Based Image Retrieval are presented and discussed. The first is a search engine for font recognition. The intended usage is the search in very large font databases. The input to the search engine is an image of a text line, and the output is the name of the font used when printing the text. READ MORE

5. 3. Univalent Types, Sets and Multisets : Investigations in dependent type theory

   Author : Håkon Robbestad Gylterud; Erik Palmgren; Nicola Gambino; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; type theory; homotopy type theory; dependent types; constructive set theory; databases; formalisation; agda; Mathematics; matematik;

   Abstract : This thesis consists of four papers on type theory and a formalisation of certain results from the two first papers in the Agda language. We cover topics such as models of multisets and sets in Homotopy Type Theory, and explore ideas of using type theory as a language for databases and different ways of expressing dependencies between terms. READ MORE

6. 4. Efficient Image Retrieval with Statistical Color Descriptors

   Author : Linh Viet Tran; Reiner Lenz; Björn Kruse; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; color properties; images; statistical; content-based image retrieval CBIR ; non-parametric density estimators; image database; Kernel; Gram-Schmidt; geometry-based; Information technology; Informationsteknologi;

   Abstract : Color has been widely used in content-based image retrieval (CBIR) applications. In such applications the color properties of an image are usually characterized by the probability distribution of the colors in the image. READ MORE

7. 5. Improving fingerprint biometrics by local symmetry and fusion

   Author : Hartwig Fronthaler; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alignment; Matching; Minutiae Extraction; Image Restoration; Multi-expert Fusion; Biometrics; Symmetry Features; Structure Tensor; Quality Assessment; Fingerprint Recognition; Image Pyramid; Enhancement; Rotational Symmetry; Cascaded Fusion; Monomodal Fusion; Fingerprint;

   Abstract : Fingerprint recognition and biometrics in general have been significantly gaining attention within the last years, not least due to the biometric passport that has been introduced all over Europe and the American immigration management system US-VISIT. The tasks of fingerprint recognition can be broken down to smaller entities, i.e. READ MORE