Hakan Bulu

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In this paper we present an evaluation of four different 3D segmentation algorithms with respect to their performance on three different CT Data Sets. The segmentation algorithms evaluated in this study are seeded region growing, volumetric segmentation using WEIBULL E SD fields, automatic multilevel thresholding by using OTSU method and unseeded region(More)
This paper presents an ontology-based annotation system and BI-RADS (Breast Imaging Reporting and Data System) score reasoning with Semantic Web technologies in mammography. The annotation system is based on the Mammography Annotation Ontology (MAO) where the BI-RADS score reasoning works. However, ontologies are based on crisp logic and they cannot handle(More)
Content Based Image Retrieval (CBIR) systems enables to retrieve images from large image archieves based on its contents as well as external attributes associated to each image. This study aims at extracting low level attributes to be used in a CBIR model that enables the utilization of low level image based attributes together with high level concepts. The(More)
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