What Happened in CLEF 2009 -- What Happened in CLEF 2009 -- I: Interactive Cross-Language Retrieval (iCLEF) -- Overview of iCLEF 2009: Exploring Search Behaviour in a Multilingual Folksonomy Environment -- Analysis of Multilingual Image Search Logs: Users' Behavior and Search Strategies -- User Behaviour and Lexical Ambiguity in Cross-Language Image Retrieval -- Users' Image Seeking Behavior in a Multilingual Tag Environment -- II: Cross-Language Retrieval in Image Collections (ImageCLEF) -- Diversity in Photo Retrieval: Overview of the ImageCLEFPhoto Task 2009 -- Overview of the WikipediaMM Task at ImageCLEF 2009 -- Overview of the CLEF 2009 Medical Image Retrieval Track -- Overview of the CLEF 2009 Medical Image Annotation Track -- Overview of the CLEF 2009 Large-Scale Visual Concept Detection and Annotation Task -- Overview of the CLEF 2009 Robot Vision Track -- ImageCLEFPhoto -- Diversity Promotion: Is Reordering Top-Ranked Documents Sufficient? -- Comparison of Several Combinations of Multimodal and Diversity Seeking Methods for Multimedia Retrieval -- University of Glasgow at ImageCLEFPhoto 2009: Optimising Similarity and Diversity in Image Retrieval -- Multimedia Retrieval by Means of Merge of Results from Textual and Content Based Retrieval Subsystems -- Image Query Expansion Using Semantic Selectional Restrictions -- Clustering for Text and Image-Based Photo Retrieval at CLEF 2009 -- ImageCLEFwiki -- Combining Text/Image in WikipediaMM Task 2009 -- Document Expansion for Text-Based Image Retrieval at CLEF 2009 -- Multimodal Image Retrieval over a Large Database -- Using WordNet in Multimedia Information Retrieval -- ImageCLEFmed -- Medical Image Retrieval: ISSR at CLEF 2009 -- An Integrated Approach for Medical Image Retrieval through Combining Textual and Visual Features -- Analysis Combination and Pseudo Relevance Feedback in Conceptual Language Model -- The MedGIFT Group at ImageCLEF 2009 -- An Extended Vector Space Model for Content Based Image Retrieval -- Using Media Fusion and Domain Dimensions to Improve Precision in Medical Image Retrieval -- ImageCLEFmed Annotation -- ImageCLEF 2009 Medical Image Annotation Task: PCTs for Hierarchical Multi-Label Classification -- Dense Simple Features for Fast and Accurate Medical X-Ray Annotation -- Automated X-Ray Image Annotation -- ImageCLEF Annotation and Robot Vision -- Topological Localization of Mobile Robots Using Probabilistic Support Vector Classification -- The University of Amsterdam's Concept Detection System at ImageCLEF 2009 -- Enhancing Recognition of Visual Concepts with Primitive Color Histograms via Non-sparse Multiple Kernel Learning -- Using SIFT Method for Global Topological Localization for Indoor Environments -- UAIC at ImageCLEF 2009 Photo Annotation Task -- Learning Global and Regional Features for Photo Annotation -- Improving Image Annotation in Imbalanced Classification Problems with Ranking SVM -- University of Glasgow at ImageCLEF 2009 Robot Vision Task: A Rule Based Approach -- A Fast Visual Word Frequency - Inverse Image Frequency for Detector of Rare Concepts -- Exploring the Semantics behind a Collection to Improve Automated Image Annotation -- Multi-cue Discriminative Place Recognition -- MRIM-LIG at ImageCLEF 2009: Robotvision, Image Annotation and Retrieval Tasks -- ImageCLEF Mixed -- The ImageCLEF Management System -- Interest Point and Segmentation-Based Photo Annotation -- University of Jaén at ImageCLEF 2009: Medical and Photo Tasks -- III: Cross-Language Retrieval in Video Collections (VideoCLEF) -- Overview of VideoCLEF 2009: New Perspectives on Speech-Based Multimedia Content Enrichment -- Methods for Classifying Videos by Subject and Detecting Narrative Peak Points -- Using Support Vector Machines as Learning Algorithm for Video Categorization -- Video Classification as IR Task: Experiments and Observations -- Exploiting Speech Recognition Transcripts for Narrative Peak Detection in Short-Form Documentaries -- Identification of Narrative Peaks in Video Clips: Text Features Perform Best -- A Cocktail Approach to the VideoCLEF'09 Linking Task -- When to Cross Over? Cross-Language Linking Using Wikipedia for VideoCLEF 2009.