/library/oar/handle/123456789/849 2025-12-29T12:31:36Z /library/oar/handle/123456789/859 Title: Fasthpe : a recipe for quick head pose estimation Editors: Bonnici, Alexandra Abstract: Estimating the head orientation of a person from a single camera is an important step for human-computer interaction, especially for widely available laptops and hand-held devices. This work aims to track a human face and estimate its orientation in the 6 degrees of freedom from an uncalibrated monocular camera, keeping the user free of any devices or wires. We propose a novel algorithm based on existing computer vision techniques for a real-time (2ms) head pose estimation system, which can start and recover from failure automatically without any previous knowledge of the user’s appearance or location. We demonstrate that this computationally efficient pose estimation system is able to track the continuous roll, yaw, and pitch angles within absolute errors of 3.03, 5.27 and 3.91 degrees respectively. We show that with the tracking of only four face features, it is possible to obtain continuous head orientation measurements in real-time (2ms). 2014-11-24T00:00:00Z /library/oar/handle/123456789/858 Title: Investigating user preferences in utilizing a 2D paper or 3D sketch based interface for creating 3D virtual models Authors: Bonnici, Alexandra; Israel, Johann Habakuk; Muscat, Anne Marie; Camilleri, Daniel; Camilleri, Kenneth P.; Rothenburg, Uwe Editors: Bonnici, Alexandra Abstract: Computer modelling of 2D drawings is becoming increasingly popular in modern design as can be witnessed in the shift of modern computer modelling applications from software requiring specialised training to ones targeted for the general consumer market. Despite this, traditional sketching is still prevalent in design, particularly so in the early design stages. Thus, research trends in computer-aided modelling focus on the the development of sketch based interfaces that are as natural as possible. In this report, we present a hybrid sketch based interface which allows the user to make draw sketches using offline as well as online sketching modalities, displaying the 3D models in an immersive setup, thus linking the object interaction possible through immersive modelling to the flexibility allowed by paper-based sketching. The interface was evaluated in a user study which shows that such a hybrid system can be considered as having pragmatic and hedonic value. 2014-12-15T00:00:00Z