opinion mining and sentiment analysis issues and challenges
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Opinion Mining and Sentiment AnalysisIssues and Challenges
Jaganadh GProject Lead NLP R&D
365Media Pvt. Ltd.jaganadhg@gmail.com
DRDO Sponsored National Level Seminaron
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
About me !!
Software Engineer Specializing in Text Analytics Research& Development
When free, teaches Python, Speaks about FOSS andblogs athttp://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 ofKerala
Jaganadh G Opinion Mining and Sentiment Analysis
Introduction
What other people think!!!
Jaganadh G Opinion Mining and Sentiment Analysis
Introduction
Friends and Family
Picture Courtesy: http://ianvaleza.com/mlm-secrets-warm-market-approach-strategies/
Jaganadh G Opinion Mining and Sentiment Analysis
Introduction
Survey
Picture Courtesy: http://www.oksociety.in/the-guest-for-legitmate-sites-for-paid-surveys/
Jaganadh G Opinion Mining and Sentiment Analysis
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
Introduction
Issues with blogs and forums
Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/
Jaganadh G Opinion Mining and Sentiment Analysis
Introduction
Now : Sentiment Analysis
Jaganadh G Opinion Mining and Sentiment Analysis
What is Sentiment Analysis
Sentiment Analysis
Automated extraction of subjective content from digital textand predicting the subjectivity such as positive or negative.
Jaganadh G Opinion Mining and Sentiment Analysis
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
Subjective Text Sources
Social Media
Picture Courtesy: http://www.alchemyuk.com/online marketing/social media marketing.php
Jaganadh G Opinion Mining and Sentiment Analysis
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
The Big Picture
Sentiment Analysis
Jaganadh G Opinion Mining and Sentiment Analysis
Basics of Sentiment Analysis
Components of Opinion
Jaganadh G Opinion Mining and Sentiment Analysis
Basics of Sentiment Analysis
Opinion Definition
Jaganadh G Opinion Mining and Sentiment Analysis
Components of Sentiment Analysis
Components
Jaganadh G Opinion Mining and Sentiment Analysis
Approaches
Approaches
Lexicon based
Supervised Learning
Unsupervised Learning
Keyword
Jaganadh G Opinion Mining and Sentiment Analysis
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
Issues and Challenges
Challenges
Language
Domain
Spam
Named Entity Identification
Reliable content
Jaganadh G Opinion Mining and Sentiment Analysis
Questions ??
Jaganadh G Opinion Mining and Sentiment Analysis
References
B. Pang, Lillian Lee Opinion Mining and SentimentAnalysis, 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
Finally
Jaganadh G Opinion Mining and Sentiment Analysis
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