Image processing on the mobile platform is a crucial component of the multimedia function of a mobile device. Image processing on the mobile platform is constrained by low-power, low computational cost, and real-time requirement. In this presentation, I will talk about some problems and solutions for image processing on the mobile platform. Specifically, I will describe some real-time algorithms and results related to image up-scaling, contrast enhancement, and content protective wide-screen scaling. I will also talk about some challenges for applying image processing algorithms to video signals.