We demonstrate a generalizable method for unified multitouch detection and response on various nonparametric and parametric surfaces to support interactive physical–virtual experiences. The method employs multiple infrared (IR) cameras, one or more projectors, IR light sources, and a rear-projection surface. IR light reflected off human fingers is captured by cameras with matched IR pass filter...

We present an efficient algorithm for computation of surface representations enabling interactive visualization of large dynamic particle data sets. Our method is based on a GPU-accelerated data-parallel algorithm for computing a volumetric density map from Gaussian weighted particles. The algorithm extracts an isovalue surface from the computed density map, using fast GPU-accelerated Marching ...

In 2D, Intelligent Scissors is an efficient interactive tool for image segmentation. By interactive use of a dynamic-programming graph-searching algorithm, a region of interest in the image can be accurately obtained. In this paper, we introduce the use of Intelligent Scissors for contour detection on a volumetric data surface. It is fast enough to be used in an interactive virtual environment,...

We want to create interactive surface design systems which provide intuitive interfaces to parametric surface representations. In this paper, we show how the technique of Differential Manipulation can be used in constructing such interfaces. It allows surface manipulation issues to be treated separately from surface representation issues. Arbitrary differentiable functions of representation par...

We propose a fast method of generating an approximate polygonal mesh from an implicit surface. Current workstations are still not capable of producing polygon meshes fast enough for the interactive modelling of complex implicit models. We propose a hybrid method that combines current implicit polygonization techniques with the faster sub-division surface technique applied as a post-process to s...

Previous interactive works have used springs, heuristics, and dynamics for surface placement applications. We present an analytical technique for kilohertz rate manipulation of CAD models with virtual surface and trimming constraints. The optimization approach allows best placement and sensitivity analysis for mechanical design objectives and parametric domain objectives. Such objectives are no...

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the present study investigated the use of interactive metadiscourse resources (imrs) in terms of appropriacy during a process- based writing course by applying qualitative and exploratory methods. moreover, learners' perception was investigated to find out how confident they felt as they were writing and rewriting the drafts. 30 intermediate efl learners were chosen to participate in this study...

Interfacing blood with any artificial surface instantly triggers the activation of coagulation at interface, posing a risk adverse thromboembolic complications. Immediately upon contact, proteins adsorb to turning it into an active prothrombogenic and proinflammatory interface promoting platelets cascade. Here, interactive hemocompatible nanocoating is designed that synergistically combines ant...