%A Haiqiang Zuo %A Weiming Hu %A Ou Wu %A Yunfei Chen %A Guan Luo %T Detecting Image Spam Using Local Invariant Features and Pyramid Match Kernel %X Image spam is a new obfuscating method which spammers invented to more effectively bypass conventional text based spam filters. In this paper, we extract local invariant features of images and run a one-class SVM classifier which uses the pyramid match kernel as the kernel function to detect image spam. Experimental results demonstrate that our algorithm is effective for fighting image spam. %C Madrid, Spain %D 2009 %P 1187-1187 %L www2009174