44 search results - page 9 / 9 » Exploiting Hierarchical Context on a Large Database of Objec... |
SIGMOD
2007
ACM
14 years 5 months ago
2007
ACM
An emerging challenge in modern distributed querying is to efficiently process multiple continuous aggregation queries simultaneously. Processing each query independently may be i...
CCS
2010
ACM
13 years 5 months ago
2010
ACM
We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against th...
KDD
2007
ACM
14 years 5 months ago
2007
ACM
Accurate localization of mobile objects is a major research problem in sensor networks and an important data mining application. Specifically, the localization problem is to deter...
MM
2010
ACM
13 years 3 months ago
2010
ACM
Social tags describe images from many aspects including the visual content observable from the images, the context and usage of images, user opinions and others. Not all tags are ...