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MM
2009
ACM
217views Multimedia» more  MM 2009»
16 years 16 days ago
Label to region by bi-layer sparsity priors
In this work, we investigate how to automatically reassign the manually annotated labels at the image-level to those contextually derived semantic regions. First, we propose a bi-...
Xiaobai Liu, Bin Cheng, Shuicheng Yan, Jinhui Tang...
SIGCOMM
2009
ACM
16 years 16 days ago
Hot today, gone tomorrow: on the migration of MySpace users
While some empirical studies on Online Social Networks (OSNs) have examined the growth of these systems, little is known about the patterns of decline in user population or user a...
Mojtaba Torkjazi, Reza Rejaie, Walter Willinger
SIGIR
2009
ACM
16 years 16 days ago
Fast nonparametric matrix factorization for large-scale collaborative filtering
With the sheer growth of online user data, it becomes challenging to develop preference learning algorithms that are sufficiently flexible in modeling but also affordable in com...
Kai Yu, Shenghuo Zhu, John D. Lafferty, Yihong Gon...
SOUPS
2009
ACM
16 years 16 days ago
Balancing usability and security in a video CAPTCHA
We present a technique for using content-based video labeling as a CAPTCHA task. Our CAPTCHAs are generated from YouTube videos, which contain labels (tags) supplied by the person...
Kurt Alfred Kluever, Richard Zanibbi
SOUPS
2009
ACM
16 years 16 days ago
Challenges in supporting end-user privacy and security management with social navigation
Social navigation is a promising approach for supporting privacy and security management. By aggregating and presenting the choices made by others, social navigation systems can p...
Jeremy Goecks, W. Keith Edwards, Elizabeth D. Myna...