Boosted Cannabis Image Recognition
Nianhua Xie, Xi Li, Xiaoqin Zhang, Weiming Hu
Institute of Automation, Chinese Academy of Sciences
James Z. Wang
The Pennsylvania State University, University Park, PA 16802
Abstract:
With the large number of Websites promoting the use of illicit drugs,
it has become important to screen these sites for the protection of
children on the Internet. Conventional keyword-based approaches are
not sufficient because these Websites often have lots of images and
little meaningful words than prices. We propose an AdaBoost-based
algorithm for cannabis image recognition. This is the first known
attempt at computerized detection of illicit drug Web contents using
images. The main technical contributions of our work are
two-fold. First, we introduce a novel weak classifier which considers
the inherently structural property or self-similarity of the cannabis
plants. The self-correlation structural characteristics of cannabis
can be used as a discriminative property for the purpose of cannabis
image recognition. Second, we propose a rapid weak classifier finder,
which can efficiently select discriminative weak classifiers from the
weak classifier space with little degradation to the classification
accuracy. Experiments on real world images have demonstrated improved
performance of our method over other methods.
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Citation:
Nianhua Xie, Xi Li, Xiaoqin Zhang, Weiming Hu and James Z. Wang,
``Boosted Cannabis Image Recognition,'' Proceedings of the
International Conference on Pattern Recognition, pp. -, Tampa,
Florida, December 2008.
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October 1, 2007
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