Xinyu Xing
ABSTRACT
Online video chat services such as Chatroulette, Omegle, and vChatter that randomly match pairs of users in video chat sessions are fast becoming very popular, with over a million users per month in the case of Chatroulette. A key problem encountered in such systems is the presence of flashers and obscene content. This problem is especially acute given the presence of underage minors in such systems. This paper presents SafeVchat, a novel solution to the problem of flasher detection that employs an array of image detection algorithms. A key contribution of the paper concerns how the results of the individual detectors are fused together into an overall decision classifying the user as misbehaving or not, based on Dempster-Shafer Theory. The paper introduces a novel, motion-based skin detection method that achieves significantly higher recall and better precision. The proposed methods have been evaluated over real-world data and image traces obtained from Chatroulette.com.
- iwebcam. http://iwebcam.com/.Google Scholar
- Safevchat project website. https://csel.cs.colorado.edu/~xingx/project/privacy.html.Google Scholar
- O. Basir and X. Yuan. Engine fault diagnosis based on multi-sensor information fusion using dempster-shafer evidence theory. Information Fusion, 8(4):379--386, 2007. Google ScholarDigital Library
- I. Bloch. Some aspects of dempster-shafer evidence theory for classification of multi-modality medical images taking partial volume effect into account. Pattern Recognition Letters, pages 905--919, 1996. Google ScholarDigital Library
- Blurrypeople web site. http://www.blurrypeople.com/.Google Scholar
- A. Bosson, G. C. Cawley, Y. Chan, and R. Harvey. Non-retrieval: blocking pornographic images. In Proceedings International Conference on the Challenge of Image and Video Retrieval, 2002. Google ScholarDigital Library
- Y. Chan, R. Harvey, and D. Smith. Building systems to block pornography. In In Challenge of Image Retrieval, pages 34--40, 1999.Google ScholarCross Ref
- Chat for free. http://www.chatforfree.org/.Google Scholar
- Chatroulette web site. http://www.chatroulette.com/.Google Scholar
- T. M. Chen and V. Venkataramanan. Dempster-shafer theory for intrusion detection in ad hoc networks. IEEE Internet Computing, 9:35--41, 2005. Google ScholarDigital Library
- F. Dadgostar and A. Sarrafzadeh. An adaptive real-time skin detector based on Hue thresholding: A comparison on two motion tracking methods. Pattern Recognition Letters, 27(12):1342--1352, 2006. Google ScholarDigital Library
- R. Datta, D. Joshi, J. Li, and J. Z. Wang. Image retrieval: Ideas, influences, and trends of the new age. ACM Computing Surveys, 2008. Google ScholarDigital Library
- Mathmatical morphology. http://en.wikipedia.org/wiki/Mathematical_morphology.Google Scholar
- Chatroulette, a dangerous website for kids and adults alike. Examiner News. March 2, 2010. http://www.examiner.com/crime-prevention-in-national/chatroulette-a-dangerous-website-for-kids-and-adults-alike.Google Scholar
- Y. Freund and R. E. Schapire. A decision-theoretic generalization of on-line learning and an application to boosting, 1995.Google Scholar
- Goth chat city. http://www.gothchatcity.com/.Google Scholar
- J. W. Guan and D. A. Bell. Evidence Theory and its Applications. Elsevier Science Inc., 1992. Google ScholarDigital Library
- D. W. Hosmer and S. Lemeshow. Applied Logistic Regression, 2nd Edition. Wiley-Interscience Publication, 2000.Google ScholarCross Ref
- W. Hu, O. Wu, Z. Chen, Z. Fu, and S. Maybank. Recognition of pornographic web pages by classifying texts and images. IEEE Transactions on Pattern Analysis and Machine Intelligence, pages 1019--1034, 2007. Google ScholarDigital Library
- Intel. Open computer vision library (opencv), April 2010. http://opencv.willowgarage.com/wiki/.Google Scholar
- C. Jansohn, A. Ulges, and T. M. Breuel. Detecting Pornographic Video Content by Combining Image Features with Motion Information. In Proceeding of the seventeen ACM international conference on Multimedia, 2009. Google ScholarDigital Library
- T. W. S. J. Jennifer Valentino-DeVries. The decline and fall of chatroulette, 2010. http://blogs.wsj.com/digits/2010/08/30/the-decline-and-fall-of-chatroulette/.Google Scholar
- F. Jiao, W. Gao, L. Duan, and G. Cui. Detecting Adult Image using Multiple Features. In Proceeding of International Conferences on Info-tech and Info-net, 2001.Google Scholar
- C. John D~Sutter. vchatter: The not-so-naked chatroulette, 2010. http://www.cnn.com/2010/TECH/innovation/10/01/vchatter.facebook/index.html?hpt=Sbin.Google Scholar
- M. J. Jones and J. M. Rehg. Statistical color models with application to skin detection. In International Journal of Computer Vision, pages 274--280, 1999. Google ScholarDigital Library
- P. Kakumanu, S. Makrogiannis, and N. Bourbakis. A survey of skin-color modeling and detection methods. Pattern Recognition, 2007. Google ScholarDigital Library
- J.-S. Lee, Y.-M. Kuo, P.-C. Chung, and E.-L. Chen. Naked image detection based on adaptive and extensible skin color model. Pattern Recognition, 2007. Google ScholarDigital Library
- Y. Liu, D. Zhang, G. Lu, and W.-Y. Ma. A survey of content-based image retrieval with high-level semantics. Pattern Recognition., 40(1):262--282, 2007. Google ScholarDigital Library
- J. Malpica, M. Alonso, and M. Sanz. Dempster-shafer theory in geographic information systems: A survey. Expert Systems with Applications, 32(1):47--55, 2007.Google ScholarCross Ref
- R. R. Murphy. Dempster-shafer theory for sensor fusion in autonomous mobile robots. IEEE Transactions on Robotics and Automation, pages 197--206, 1998.Google ScholarCross Ref
- Omegle web site. http://www.omegle.com/.Google Scholar
- PicBlock. http://www.cinchworks.com/.Google Scholar
- U. K. RAKOWSKY and V. K. GmbH. Fundamentals of the dempster-shafer theory and its applications to reliability modeling. International Journal of Reliability, Quality and Safety Engineering (IJRQSE), pages 579--601, 2007.Google Scholar
- Randomdorm web site. http://randomdorm.com/.Google Scholar
- H. A. Rowley, Y. Jing, and S. Baluja. Large scale image-based adult-content filtering, 2006.Google Scholar
- G. Shafer. A Mathematical Theory of Evidence. Princeton University Press, 1976.Google Scholar
- SPSS. http://www.spss.com/.Google Scholar
- SYSTAT. http://www.systat.com/SystatProducts.aspx.Google Scholar
- Can Chatroulette get it up again? TechCrunch. August 23, 2010. http://techcrunch.com/2010/08/23/chatroulette-up-again/.Google Scholar
- Wald test. http://en.wikipedia.org/wiki/Wald_test.Google Scholar
- H. Zheng, M. Daoudi, and B. Jedynak. Blocking adult images based on statistical skin detection. In Electronic Letters on Computer Vision and Image Analysis, 2004.Google ScholarCross Ref
Index Terms
- SafeVchat: detecting obscene content and misbehaving users in online video chat services
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