Opinion Mining and Sentiment Analysis Issues and Challenges
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Opinion Mining and Sentiment Analysis

Opinion Mining and Sentiment Analysis
Issues and Challenges

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Opinion Mining and Sentiment Analysis Issues and Challenges Presentation Transcript

  • 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. 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. Introduction What other people think!!! Jaganadh G Opinion Mining and Sentiment Analysis
  • 4. Introduction Friends and Family Picture Courtesy: http://ianvaleza.com/mlm-secrets-warm-market-approach-strategies/ Jaganadh G Opinion Mining and Sentiment Analysis
  • 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. 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. Introduction Issues with blogs and forums Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/ Jaganadh G Opinion Mining and Sentiment Analysis
  • 8. Introduction Now : Sentiment Analysis Jaganadh G Opinion Mining and Sentiment Analysis
  • 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. 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. 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. 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. The Big Picture Sentiment Analysis Jaganadh G Opinion Mining and Sentiment Analysis
  • 14. Basics of Sentiment Analysis Components of Opinion Jaganadh G Opinion Mining and Sentiment Analysis
  • 15. Basics of Sentiment Analysis Opinion Definition Jaganadh G Opinion Mining and Sentiment Analysis
  • 16. Components of Sentiment Analysis Components Jaganadh G Opinion Mining and Sentiment Analysis
  • 17. Approaches Approaches Lexicon based Supervised Learning Unsupervised Learning Keyword Jaganadh G Opinion Mining and Sentiment Analysis
  • 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. Issues and Challenges Challenges Language Domain Spam Named Entity Identification Reliable content Jaganadh G Opinion Mining and Sentiment Analysis
  • 20. Questions ?? Jaganadh G Opinion Mining and Sentiment Analysis
  • 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. Finally Jaganadh G Opinion Mining and Sentiment Analysis