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This work treats the topic of how to represent eeciently facial textures, for model-based coding of image sequences depicting human faces. The scheme works by geometrically normalizing the image, i.e., compensating for diierent parameters such as head rotation, facial expressions and diierences in facial geometry. The texture is then transformed using the(More)
In this thesis we study algorithms and architectures that can provide a better Quality of Experience (QoE) for streaming video systems and services. With cases and examples taken from the application scenarios of football on mobile phones, we address the fundamental problems behind streaming video services. Thus, our research results can be applied and(More)
Mobile advertisement (ad for short) is a major financial pillar for developers to provide free mobile apps. However, it is frequently thwarted by ad fraud, where rogue code tricks <i>ad providers</i> by forging ad display or user clicks, or both. With the mobile ad market growing drastically (e.g., from $8.76 billion in 2012 to $17.96 billion in 2013), it(More)