Opinion Mining and Sentiment Analysis Issues and Challenges

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Opinion Mining and Sentiment Analysis
Issues and Challenges

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Opinion Mining and Sentiment Analysis Issues and Challenges

  1. 1. Opinion Mining and Sentiment Analysis Issues and Challenges Jaganadh G Project Lead NLP R&D 365Media Pvt. Ltd. jaganadhg@gmail.com DRDO Sponsored National Level Seminar on Challenging Issues on Data Mining Semantic Web, Sri Krishna College of Engineering and Technology, Coimbatore 27th Jan 2012 Jaganadh G Opinion Mining and Sentiment Analysis
  2. 2. About me !! Software Engineer Specializing in Text Analytics Research & Development When free, teaches Python, Speaks about FOSS and blogs at http://jaganadhg.in Working as Project Lead (NLP) 365Media Pvt. Ltd. Coimbatore I am a computational linguist / Linguist and Indologist, Book reviewer Maters Degree Holder in Sanskrit from University of Kerala Jaganadh G Opinion Mining and Sentiment Analysis
  3. 3. Introduction What other people think!!! Jaganadh G Opinion Mining and Sentiment Analysis
  4. 4. Introduction Friends and Family Picture Courtesy: http://ianvaleza.com/mlm-secrets-warm-market-approach-strategies/ Jaganadh G Opinion Mining and Sentiment Analysis
  5. 5. Introduction Survey Picture Courtesy: http://www.oksociety.in/the-guest-for-legitmate-sites-for-paid-surveys/ Jaganadh G Opinion Mining and Sentiment Analysis
  6. 6. Introduction Blogs, Forums, Social Network .... Picture Courtesy: http://imfoundation.blogspot.com/p/im-forumsblogs.html Picture Courtesy:http://www.my-social-network.org/ Jaganadh G Opinion Mining and Sentiment Analysis
  7. 7. Introduction Issues with blogs and forums Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/ Jaganadh G Opinion Mining and Sentiment Analysis
  8. 8. Introduction Now : Sentiment Analysis Jaganadh G Opinion Mining and Sentiment Analysis
  9. 9. What is Sentiment Analysis Sentiment Analysis Automated extraction of subjective content from digital text and predicting the subjectivity such as positive or negative. Jaganadh G Opinion Mining and Sentiment Analysis
  10. 10. Subjectivity Subjectivity Linguistic expression of somebody’s emotions, opinions, sentiment ....... Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/ Jaganadh G Opinion Mining and Sentiment Analysis
  11. 11. Subjective Text Sources Social Media Picture Courtesy: http://www.alchemyuk.com/online marketing/social media marketing.php Jaganadh G Opinion Mining and Sentiment Analysis
  12. 12. Example Review Nokia Lumia 800 Review Courtesy: http://www.techradar.com/reviews/phones/mobile-phones/nokia-lumia-800-1039101/user-review Jaganadh G Opinion Mining and Sentiment Analysis
  13. 13. The Big Picture Sentiment Analysis Jaganadh G Opinion Mining and Sentiment Analysis
  14. 14. Basics of Sentiment Analysis Components of Opinion Jaganadh G Opinion Mining and Sentiment Analysis
  15. 15. Basics of Sentiment Analysis Opinion Definition Jaganadh G Opinion Mining and Sentiment Analysis
  16. 16. Components of Sentiment Analysis Components Jaganadh G Opinion Mining and Sentiment Analysis
  17. 17. Approaches Approaches Lexicon based Supervised Learning Unsupervised Learning Keyword Jaganadh G Opinion Mining and Sentiment Analysis
  18. 18. Issues and Challenges Challenges Picture Courtesy: http://inventionmachine.com/the-Sustainable-Innovation-Blog/bid/51703/Three-Key- Challenges-to-Entering-New-Markets Jaganadh G Opinion Mining and Sentiment Analysis
  19. 19. Issues and Challenges Challenges Language Domain Spam Named Entity Identification Reliable content Jaganadh G Opinion Mining and Sentiment Analysis
  20. 20. Questions ?? Jaganadh G Opinion Mining and Sentiment Analysis
  21. 21. References B. Pang, Lillian Lee Opinion Mining and Sentiment Analysis, Now Publishers Inc, July 2008. B. Pang, Lillian Lee, S Vaithyanathan Thumbs up? sentiment classification using machine learning techniques, 2002. Jaganadh G Opinion Mining and Sentiment Analysis
  22. 22. Finally Jaganadh G Opinion Mining and Sentiment Analysis

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