3D printing technology can produce complex objects directly from computer aided digital designs. The technology has traditionally been used by large companies to produce fit and form concept prototypes ('rapid prototyping') before production. In recent years however there has been a move to adopt the technology as full-scale manufacturing solution. The advent of low-cost, desktop 3D printers su...

This paper presents algorithms for fast segmentation of 3D point clouds and subsequent classification of the obtained 3D segments. The method jointly determines the ground surface and segments individual objects in 3D, including overhanging structures. When compared to six other terrain modelling techniques, this approach has minimal error between the sensed data and the representation; and is ...

Sculpting various 3D facial expressions from a static 3D face model is a process with intensive manual tuning efforts. In this paper, we present an interactive 3D facial expression posing system through 2D portrait manipulation, where a manipulated 2D portrait serves a metaphor for automatically inferring its corresponding 3D facial expression with fine details. Users either rapidly assemble a ...

3D bioprinting has been invented for more than a decade. A disruptive progress is still lacking for the field to significantly move forward. Recently, the invention of 4D printing technology may point a way and hence the birth of 4D bioprinting. However, 4D bioprinting is not well defined and appear to have a few distinct early forms. In this article, a personal perspective on the early forms o...

The original design for the PCI bus was to move high bandwidth peripherals closer to the CPU for performance gains. Graphics-oriented operating systems (OS) and other high bandwidth functions such as Ultra2 SCSI, Fibre Channel, Fast Ethernet, and 3D graphics are consuming more PCI bus bandwidth. This need for more bandwidth has compelled system vendors to find ways of increasing the throughput ...

Crawling mechanisms with energetic and control autonomy may move and steer by sliding on the ground. The paper presents an analytic and MBS simulation study on the possibilities and limits of steering a tetrahedral mechanism on a slope. The mechanism movement is analyzed using an equivalent 3d model. The analysis is structural, kinematical, static and dynamic. The limit conditions for stability...

In this paper, we discuss our challenge on how to give the creatures and ability to follow spatial restriction while keeping the complexity low enough to still allow for real-time simulation of the herd. Our methodologies extend the pioneering work by Reynolds' flocking algorithm. We extend how the herd can move in natural-looking paths. Also, we show like the creatures to travel smoothly in 3D...

Listeners tend to gaze at objects to which they resolve referring expressions. We show that this remains true even when these objects are presented in a virtual 3D environment in which listeners can move freely. We further show that an automated speech generation system that uses eyetracking information to monitor listener’s understanding of referring expressions outperforms comparable systems ...

Human motion tracking from single-view 2D measurements contains inherent ambiguities, due to depth ambiguities and the indirect relation of pixel intensities to 3D poses. Prior models of human poses and motion show great promise in resolving these difficulties, by biasing inference toward the most probable configurations. The main challenge is to describe models that accurately describe how peo...

Geographical Information Systems (GISs) can be seen as a common tool to map and visualize the air quality index based on geographical locations. However, in urban areas, the area resolution for air quality models is less than 2 kilometres. Since the main emissions agent in urban areas is predominantly vehicular engines, the situation will become worse when pollutants are trapped between buildin...