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LineLens : Automatic Data Extraction from Line Charts

INTRODUCTION Charts and Diagrams are used extensively in newspapers, scientific publications, and visualization websites to communicate data to the audience succinctly and compactly. These charts often contain useful and valuable information and cover a wide variety of topics. It would be advantageous for users to be able to directly search for and query on these charts, instead of sifting through pages of information among websites. For example, the user can query “What is the population of United States in 1960’s”, and a line chart containing the population trend of U.S. during 1960’s can be returned to the user, as opposed to links to websites. This arguably helps the user gain an overall understanding of the subject matter much more efficiently and effectively.