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Weighted Link Analysis for Logo and Trademark Image Retrieval on the Web

Weighted Link Analysis for Logo and Trademark Image Retrieval on the Web. Epimenidis Voutsakis * Euripides G.M. Petrakis * Evangelos Milios ** * Technical University of Crete ** Dalhousie University. Image Retrieval on the Web. Text queries Answers : images in Web pages

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Weighted Link Analysis for Logo and Trademark Image Retrieval on the Web

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  1. Weighted Link Analysis for Logo and Trademark Image Retrieval on the Web Epimenidis Voutsakis* Euripides G.M. Petrakis* Evangelos Milios** *Technical University of Crete **Dalhousie University

  2. Image Retrieval on the Web • Text queries • Answers: images in Web pages • Relevant but not always important • From corporate web sites, organizations • From individuals and small companies • Link analysis: assign higher ranking to answers from important web site • Important doesn’t mean relevant !! http://www.ece.tuc.gr/intellisearch

  3. Link Analysis • PageRank and HITS for text retrieval • PicASHOW for Web pages with images • WPicASHOW handles image and text content in queries and Web pages • Main idea: co-cited and co-contained images are likely to be related http://www.ece.tuc.gr/intellisearch

  4. Image descriptions as • Text surrounding images in Web pages • Image filename, Alternate text, Page title, Caption • Image features • Intensity histogram, Energy spectrum, Moment invariants http://www.ece.tuc.gr/intellisearch

  5. Example http://www.ece.tuc.gr/intellisearch

  6. WPicASHOW • Queries are matched against text and image descriptions on links • Create the focused sub-graph F • Authorities: principal eigenvector of [(W+I)MT](W+I)M • W: page to page relationships in F • M: page to image relationships in F • Rank answers by authority value http://www.ece.tuc.gr/intellisearch

  7. Text Queries http://www.ece.tuc.gr/intellisearch

  8. Queries by text and image http://www.ece.tuc.gr/intellisearch

  9. Conclusions • Text retrieval: accurate • Relevant but not always important answer • PicASHOW retrieves important but not always relevant answers • WPicASHOW: good compromise between relevance and importance • Handles image content and queries by image example http://www.ece.tuc.gr/intellisearch

  10. Web Implementation • Try WPicASHOW at • http://www.ece.tuc.gr/intellisearch • Over than 1.5 million pages with images • Selection of retrieval method • Link analysis method • And more.. http://www.ece.tuc.gr/intellisearch

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