537 research outputs found
Exploration of wavelet-based feature spaces in medical image analysis
Get PDFLessmann B. Exploration of wavelet-based feature spaces in medical image analysis. Bielefeld (Germany): Bielefeld University; 2007.Die medizinische Bildanalyse beinhaltet eine Vielzahl unterschiedlicher Fragestellungen und Anforderungen. Grundprinzip für viele Anwendungen ist es hier, den Bilddatensatz numerisch zu repräsentieren. Diese numerische Beschreibung in Form sogenannter Merkmalsvektoren kann dann dazu genutzt werden, Bilddatensätze zu analysieren, zu klassifizieren oder anderweitig zu verarbeiten. Die Herausforderung ist es demnach, geeignete numerische Merkmale zu finden, die das zu analysierende Bild und seine medizinischen Charakteristiken optimal repräsentieren. In dieser Arbeit wird eine Methodik vorgestellt, die es erlaubt, solche spezifischen Merkmale zu entwickeln, zu analysieren und an den jeweiligen medizinischen Kontext anzupassen. Die Merkmale werden mittels einer Diskreten Wavelet-Transformation erzeugt und mittels Methoden der Dimensionsreduktion analysiert und optimiert. Die Methodik wird an zwei sehr unterschiedlichen Bildatensätzen aus der klinischen Tumordiagnostik demonstriert. Für beide Datensätze werden numerische Merkmale entwickelt, die dazu geeignet sind, den Datensatz im Rahmen unterschiedlicher Anwendungen zu repräsentieren.In medical image processing a wide amount of different tasks is currently under consideration. The principle in most of the developed technical solutions is the numerical representation of an image. The numerical description of the image by so called feature vectors then allows to analyse or classify the images or to process them in any different way. The important challenge here is to find numerical features, which are particularly appropriate to represent the image and its clinical characteristics. In this work a methodology is presented allowing to develop and analyse those features in order to obtain a numerical representation especially well adapted to the clinical context. The features are obtained from a Discrete Wavelet Transform and analysed and optimized by methods of dimension reduction. The methodology is demonstrated on two highly different types of datasets acquired for the purpose of tumour diagnostics. For both databases numerical features are defined suitable to represent the particular dataset in various applications
Clustering approach for wavelet transformed MR image data
No full textLessmann B, Nattkemper TW, Degenhard A, et al. Clustering approach for wavelet transformed MR image data. In: Proceedings of the 14th International Conference of Medical Physics. 2005: 1412
Use of automated image analysis to detect changes in megafaunal densities at HAUSGARTEN (79°N west off Svalbard) between 2002 and 2004
No full textLessmann B, Wang Y, Bergmann M, Kämpfe T, Nattkemper TW. Use of automated image analysis to detect changes in megafaunal densities at HAUSGARTEN (79°N west off Svalbard) between 2002 and 2004. Presented at the EMBS - 42nd European Marine Biology Symposium, Kiel, Germany
Content Based Image Retrieval for Dynamic Time Series Data
No full textLessmann B, Nattkemper TW, Huth J, et al. Content Based Image Retrieval for Dynamic Time Series Data. In: Proceedings of BVM. 2006: 61-65
Mirror Landing - As Remembered by Birgit Hult
Get PDFNotes - This account, Memories Mirror Landing by Birgit Hult, was compiled by Birgit's daughter, Jean Elvira Male, it documents the Hult family's experiences in Mirror Landing from 1912 - 1916. The Hults, who were originally from Sweden, arrived in Mirror Landing with two young children, a third child was born during their stay in Mirror Landing. Upon arriving in the area, the Hults made friends with the Gauthier family. The wives became good friends and would swap piano lessons for English lessons. Details of the log home where the family lived and the surrounding landscape were recalled. A memory about a large forest fire that occurred near the family home and dances that were attended in the town are discussed. Jean recalls her mother's memories regarding the animosity towards the North West Mounted Police that was felt by the people of Mirror Landing. The Hult family retained a strong connection to the Swedish heritage and practised many Swedish traditions, such as flying the Swedish flag and eating hot cross buns stuffed with Swedish Marzipan soaked in warm milk. Photos and a postcard written in 1915 are included in this article (10 pages
Knowing Through Popular Music in the Western Pacific Island World
No full textPacific Indigenous scholars have long emphasized the role of relationality for Pacific Islanders’ epistemologies. In this article, the author rethinks music in terms of the procedural knowledge inherent in and specific to popular music-making by exploring the latter as knowledge practices in Micronesia. This approach opens new vistas on the relationality at the heart of Western Pacific music-making. The author calls the musical manifestation of that relational capacity sound ties, suggesting that if, following Epeli Hau‘ofa, Oceania is “humanity rising from the depths of brine”, then it is not least the sound ties of knowing in and through music that mould that very humanity of people who are at home with the sea into aquapelagic assemblages that are, after all, so much more than water and land
Feature space exploration of pathology images using Content-Based Database Visualization
No full textLessmann B, Hans V, Degenhard A, Nattkemper TW. Feature space exploration of pathology images using Content-Based Database Visualization. In: Medical Imaging 2006: Image Processing. Proceedings of SPIE. Vol 6144. San Diego, CA: SPIE; 2006.In this work we present a method for the interactive feature space exploration and content-based database visualization (CBDV) of medical image databases. Using Self Organizing Maps it is possible to visualize the content of a medical image database. This visualization provides the basis for an interactive visual exploration of the meaning of image features and a characterization of the database content
EU-Behörde: Warum wir sie brauchen
No full textJan Cremers (UvT) contributed to the magazine Gute Arbeit (in German), published by BUND-Verlag. Together with co-author Birgit Krämer, he discusses the plans of the European Commission to introduce a European Labour Authority. They reflect on the possible contribution of such a body in checking respect for and compliance with labour legislation and conventional standards
Visual Exploration of Pathology Images by a Discrete Wavelet Transform Preprocessed Locally Linear Embedding.
No full textVarini C, Lessmann B, Degenhard A, Hans VH, Nattkemper TW. Visual Exploration of Pathology Images by a Discrete Wavelet Transform Preprocessed Locally Linear Embedding. In: Handels H, Ehrhardt J, Horsch A, Meinzer H-P, Tolxdorff T, Gesellschaft für Informatik, eds. Bildverarbeitung für die Medizin. Informatik aktuell. Berlin : Springer; 2006: 66-70
Rude Girl de Birgit Weyhe et Priscilla Layne, une "ré-appropriation culturelle" à quatre mains ?
No full textInternational audienceThis article analyses the graphic novel Rude Girl (2022), a drawn (self-)portrait created collaboratively by Priscilla Layne, an African American of Caribbean descent and professor of German Studies, and Birgit Weyhe, a German comic book author. The work is first presented within the general context of Birgit Wehye’s albums, a former student of Anke Feuchtenberger and winner of the Max-und-Moritz Prize, in order to highlight some characteristics of how the author has thus far addressed cultural differences, including in the albums that recounted her ‘German’ childhood in Uganda and Kenya. The article then reexamines the controversy surrounding the album Madgermanes, perceived as ‘cultural appropriation’ by American Germanists. This controversy is revisited here in light of Priscilla Layne's publications, notably her book White Rebels in Black: German Appropriation of Black Popular Culture (2018), as well as her numerous reviews in the field of Black Studies and her translation of Olivia Wenzel's 1000 Serpentinen Angst. A thorough analysis of Rude Girl ultimately reveals a shift in the representation of cultural otherness, particularly through the means of (auto)biographical co-construction.Cet article analyse le roman graphique Rude girl (2022), (auto-)portrait dessiné, réalisé à quatre mains par Priscilla Layne, Afro-américaine d’origine caribéenne et professeure en études germaniques, et Birgit Weyhe, autrice allemande de bandes dessinées. L’oeuvre est d’abord replacée dans le contexte général des albums de Birgit Weyhe, élève d’Anke Feuchtenberger et lauréate du Prix Max-und-Moritz, pour dégager quelques caractéristiques de la façon dont l’autrice accueillait jusque-là la différence culturelle, y compris dans les albums qui faisaient le récit de son enfance « allemande » en Ouganda et au Kenya. L’article revient ensuite sur la polémique suscitée par l’album Madgermanes, perçu comme « appropriation culturelle » par les germanistes américains, polémique qui est ici revisitée à la lumière des publications de Priscilla Layne, notamment son ouvrage White Rebels in Black : German Appropriation of Black Popular Culture (2018), mais aussi ses nombreuses recensions dans le domaine des Black Studies, et sa traduction d’Olivia Wenzel, 1000 Serpentinen Angst. L’analyse approfondie de Rude girl permet finalement de mettre en évidence une césure dans la représentation de l’altérité culturelle, notamment par les moyens de la co-construction (auto-)biographique
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