We welcome you to the Third Paci?c-Rim Symposium on Image and Video Technology (PSIVT 2009), sponsored by the National Institute of Informatics, MicrosoftResearch, and the Forumfor ImageInformaticsin Japan.PSIVT 2009 washeldinTokyo, Japan, duringJanuary13-16.Themainconferencecomprised eight major themes spanning the ?eld of image and video technology, namely, image sensors and multimedia hardware, graphics and visualization, image and video analysis, recognition and retrieval, multi-view imaging and processing, computer vision applications, video communications and networking, and m- timedia...