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Special Topic on Image Retrieval

Special Topic on Image Retrieval

Special Topic on Image Retrieval. 2014-02. ??????? http://staff.ustc.edu.cn/~zhwg/SpecialTopic_IR.html. Text-based Image Retrieval. Retrieval Model Overview. Occurrence based models Boolean Retrieval Model Vector Space Model Probability models BM25 Language Model Hyperlink-based models

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1.35k views • 113 slides
TF-IDF

TF-IDF

TF-IDF. David Kauchak cs160 Fall 2009 adapted from: http://www.stanford.edu/class/cs276/handouts/ lecture6-tfidf. ppt. Administrative. Homework 3 available soon Assignment 2 available soon Popular media article. Ranked retrieval. Thus far, our queries have all been Boolean

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745 views • 51 slides
CES 514 Data Mining March 11, 2010

CES 514 Data Mining March 11, 2010

CES 514 Data Mining March 11, 2010 Lecture 5: scoring, term weighting, vector space model (Ch 6). Model for ranking documents. Ranked retrieval Zones, parameters in querying Scoring documents Term frequency Collection statistics Weighting schemes Vector space scoring.

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660 views • 50 slides
Information Retrieval

Information Retrieval

Information Retrieval. Lecture 5. Recap of lecture 4. Query expansion Index construction. This lecture. Parametric and field searches Zones in documents Scoring documents: zone weighting Index support for scoring tf ? idf and vector spaces. Parametric search.

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477 views • 42 slides
Information Retrieval

Information Retrieval

Information Retrieval. Lecture 6. Recap of lecture 4. Query expansion Index construction. This lecture. Parametric and field searches Zones in documents Scoring documents: zone weighting Index support for scoring tf ? idf and vector spaces. Parametric search.

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426 views • 42 slides
Web Search and Text Mining

Web Search and Text Mining

Web Search and Text Mining. Lecture 3. Outline. Distributed programming: MapReduce Distributed indexing Several other examples using MapReduce Zones in documents Simple scoring Term weighting. Distributed Programming. Many tasks: Process lots of data to produce other data

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537 views • 41 slides
Advanced topics in Computer Science

Advanced topics in Computer Science

Advanced topics in Computer Science. Jiaheng Lu Department of Computer Science Renmin University of China www.jiahenglu.net. This lecture. Parametric and field searches Zones in documents Scoring documents: zone weighting Index support for scoring Term weighting Vector space retrieval.

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534 views • 38 slides
INFORMATION RETRIEVAL TECHNIQUES BY DR. ADNAN ABID

INFORMATION RETRIEVAL TECHNIQUES BY DR. ADNAN ABID

INFORMATION RETRIEVAL TECHNIQUES BY DR. ADNAN ABID. Lecture # 4 Vector Space Retrieval Model. ACKNOWLEDGEMENTS. The presentation of this lecture has been taken from the following sources

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164 views • 16 slides

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