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Information Search and Visualization Human Computer Interaction CIS 6930/4930 Section 4188/4186
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Intro ► How can we design interfaces to search through large amounts of data? ► We’ll look at different approaches to sift through information ► Old approach: Information Retrieval ► New approaches: Information Gathering Seeking Filtering Visualization Data mining and warehousing ► Difficulty increases with data volume and diversity ► Ex. Find a news story, find a picture ► How can we design an interface for New users (how do I express what I want? boolean operators are not that easy to use) Experienced users (powerful search methods) ► Use research from: ► Perceptual psychologists, statisticians, graphics designers
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Searching Textual Documents and Databases ► Most widely used (and understood) ► Web searches relevance still needs work ► To satisfy both users create two interfaces (advanced and basic) Multilayer interface ► User satisfaction increases with more search control (Koenemann ’96) ► Clustering into meaningful hierarchies might be effective (Dumais ’01)
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Multimedia Searches ► Currently: Requires metadata (captions, keywords, properties) ► Query by Image Content (QBIC) – Find pictures of the Florida Gators Football team (w/o using descriptors, webpage info, etc.) Approaches: ► Search for distinctive features ► Give example images ► Image spaces ► Major research area Best: restrict database if possible (like medical, etc.) ► Map Search Easy: search by lat and long Harder: search by features (find all cities near a seaport and a moutain > 10000 ft) App: Find businesses for mobile GPS systems ► Design or diagram search CAD models, engineering apps Ex: Find 6 cylinder engine designs with pistons > 6 cm Some basic structured document searching for things like newspapers and magazine layouts
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Multimedia Searchse ► Sound Search Music-information retrieval (MIR) New approaches: ► Query with musical content (Hu ’02) ► Query by recognized patterns like singers ► Using speech recognition and TTS as inputs to audio databases ► Video Search Only preliminary research on this topic ► Infomedia (screenshot) uses visual features + text (TTS) for esarching Currently: show timeline to allow quick browsing of contents ► Animation Search Untapped, but growing need Might be easier with standard definitions like Flash
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Advanced Filtering and Searching Interfaces ► Alternatives to form-fillin ► Filter with complex Boolean queries Research into how we can make them easier to specify Difficulty is in the colloquial use of English (all classes in weil and NEB, or I’ll take ketchup or mustard) Novel metaphor approaches (doesn’t scale well) ► Venn diagrams ► Decision Tables ► Water through filters Aesthetic Computing (screenshot) ► Automatic Filtering Users create rules for data Ex. Email filters, news stories filters Similar to : Selective Dissemination of information (SDI) ► Dynamic Queries Adjusting numerical sliders (www.bluenile.com) www.bluenile.com Appealing and easy to understand a.k.a. Direct-manipulation queries (objects, [rapid, reversable, immediate] actions, feedback) Reduces errors and encourages exploration Large databases can give previews given the user defined ranges (Fig. 14.8) ► Although having such large ‘hits’ might seem poor, (Tanin ’00) showed 1.6 to 2.1 performance and satisfaction increase ► Faceted metadata search Combine category browsing with dynamic previews (Yee ’03) Search on a topic (car price), then restrict on feature (car year), then on # of doors, then widen on all years ► Collaborative Filtering Groups of users to combine evaluations to find interesting results Amazon.com’s lists or “other people who bought this item also bought…” Good for organizational databases, news files, music, shopping ► Multilingual Searches Research areas to use perhaps restricted domain-specific translation dictionaries (like medical ones) ► Visual Searches Use visual representations like maps instead of text lists to select and refine searches Trees to represent product catalogs Very powerful. (Also the calendar and plane layout methods) User error reduced User satisfaction (thoroughness)
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Information Visualization ► Visualize information data in novel methods to amplify cognition (Card ’99, others) ► Different the scientific viz because of the abstract nature ► Goal: Present compact graphics representations and user interface for manipulating large # (or subset) of items ► Visual data mining Apply visual bandwidth (which is very great) and human perception Make discoveries, decisions, hypothesis Underutilized in most interfaces Humans are good at: ► Detecting patterns ► Recall images ► Detect subtle changes in size, color, shape, texture Research: new dynamic info viz. Go beyond icons and illustrations
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Info Viz ► Provide useful tools to allow users to find trends in data ► Go beyond novelty and address true business concerns ► Share insights easily with others ► Some user resistance (esp. if text really is better!) Solution: Measure benefits ► Visual information mantra: Overview first, zoom and filter, then details on demand ► Figure out data type and task, then look at different current methods to visual them. Box 14.2 (pg 583)
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Data Types ► 1D Linear – Ex: source code, text, audio Info Viz approaches: zoom, color coding Consider: Layout, color, size, overview approach Tasks: Find # of items, changes Apps: Document Lens, SeeSoft, Info Mural ► 2D Map - Planar data Ex: GIS, floorplans, newspaper layouts Approaches: Multilayer (each layer is 2D), spatial displays Consider: Data (name, owner, value) and interface (size, color, opacity) attributes Tasks: Find adjacent items, regions, paths Apps: GIS, ArcInfo, ThemeView screen shots
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Data Types ► 3D World – more than just geometry Ex: 3d molecules, body, buildings Approaches: landmarks, overviews, multiple views, tangible UI Consider: both geometry and relationships, navigation can be difficult for many Tasks: focus on meta-relationship patterns Apps: Medical imaging, CAM, chem structure, scientific sims, flythroughs Making things 3d that aren’t or don’t fit well, doesn’t make the results better, could hamper performance Screen shots
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Data Types ► Multidimensional data
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