Andreas Wiratanaya

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We propose a highly efficient hierarchical representation for point sampled geometry that automatically balances sampling density and point coordinate quantization. The representation is very compact with a memory consumption of far less than 2 bits per point position which does not depend on the quantization precision. We present an efficient rendering(More)
Research into ageing and cognition has demonstrated the close relationship of sensory functioning and social communication to maintaining cognitive performance and mood in the elderly, yet in modern societies elderly people are increasingly isolated and under-stimulated, both physically and psycho-socially. This situation results in accelerated cognitive(More)
Those who have suffered mild brain damage due to senescence or cerebrovascular illnesses may look ordinary at first sight, however it can be difficult for them to lead a normal social life. Often, the requirement for constant care and attention creates a burden for their family members. The resulting increase in stress may have a negative effect on the(More)
We describe the design and implementation of a vision based interactive entertainment system that makes use of both involuntary and voluntary control paradigms. Unintentional input to the system from a potential viewer is used to drive attention-getting output and encourage the transition to voluntary interactive behaviour. The iMime system consists of a(More)
To obtain a satisfying registration of an AAM face graph in the presence of a wide range of facial expressions, the statistical model has to be build from a large database covering many different facial expressions and individuals. Additionally, all images have to be pecisely annotated which can be tedious and time consuming. Creating artificial variations(More)
We describe the design and implementation of an interactive character animation interface. The system analyzes the attentive state and aspects of the affective behaviour of a viewer using input from a video camera and uses this to control the behaviour of a cartoon-like animated character. Using the interaction metaphor of a mime artist, we design the(More)
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