Daniel Gruhl

Current Research Interests

• Information augmentation, selection and presentation
• Distributed systems via local area service oriented architectures

• The Search For Meaning In Large Text Databases - Large information sources are becoming more difficult for an individual to navigate efficiently. One approach to this problem is the use of machine understanding techniques to assist the user in fulfilling their information needs.
• User Modeling - In order for more consistent and useful interactions between users and computers, the computers need to begin to be aware of their users both as individuals, and as parts of communities. This requires both sensors to acquire this information, and more importantly, methods of modeling this information in ways that allow programs to make use of them.
• Statistical Modeling of Very Large Data Sets - In order to find communities from observations of individual users, it is often necessary to consider large numbers of observations about large numbers of individuals. This leads to a need for algorithms that efficiently extract from these kinds of higher level correlations from extremely large data sets.
• Information Hiding - Another, unrelated interest is in applications that allow data to be embedded in media for a variety of purposes, traveling wherever the media does. This includes watermarking tools, but also more interesting methods of providing annotation to media.
• On line information services - All these interests come together in on line information systems. The ability of such a system to select and display information in a timely and relevant way requires an understanding not just of the content being presented, but also an understanding of the user for whom the information is being presented.

• Echo Data Hiding - 1st International Workshop on Information Hiding [ps][pdf]
• Techniques for Data Hiding - IBM Systems Journal [pdf]
• Information Hiding to Catch the Casual Couterfeiter - 2nd International Workshop on Information Hiding[pdf]
• The Search for Meaning in Large Text Databases - PhD Thesis [pdf]
• Applications for data hiding - IBM Systems Journal [pdf]
• A new structure for news editing - IBM Systems Journal [pdf]
• Vinci: A Service-Oriented Architecture for Rapid Development of Web Applications - To appear in WWW10 [pdf]

• US6212285: Method and apparatus for multi-bit zoned data hiding in printed images
• US6201879: Method and apparatus for logo hiding in images
• US5893067: Method and apparatus for echo data hiding in audio signals
• US5870499: Method and apparatus for data hiding in images
• US5689587: Method and apparatus for data hiding in images