The 2013 International SenseCam Conference will be hosted at Calit2 (Atkinson Hall) on the UCSD campus in La Jolla. The meeting will take place on Monday, November 18, and Tuesday, November 19, 2013. This two-day conference in cooperation with ACM and SIGCHI is the fourth in the SenseCam series and will bring together international experts in computational science, behavior science, human-computer interaction, health sciences, and related fields. This gathering will facilitate innovative, transdisciplinary discussions of image and lifelogging data, including associated ethics, analysis, applications, design and user experience. The conference will feature keynote speakers, expert panelists, investigator presentations, and student posters, and it will aim to develop guidelines to allow comparable methods across studies to advance the science, as well as present current research exploring the integration of lifelogging technology and the interaction with the associated technology. In particular, we hope to identify new applications and opportunities to use images to change behaviors – demonstrating that a picture truly is worth a thousand words.