Search results for " graph"

Recent Advances in the Capture and Display of Macroscopic and Microscopic 3-D Scenes by Integral Imaging

2017

The capture and display of images of 3-D scenes under incoherent and polychromatic illumination is currently a hot topic of research, due to its broad applications in bioimaging, industrial procedures, military and surveillance, and even in the entertainment industry. In this context, Integral Imaging (InI) is a very competitive technology due to its capacity for recording with a single exposure the spatial-angular information of light-rays emitted by the 3-D scene. From this information, it is possible to calculate and display a collection of horizontal and vertical perspectives with high depth of field. It is also possible to calculate the irradiance of the original scene at different dep…

Computation of microimages for plenoptic display

2014

We report a new algorithm for the generation of the microimages ready for their projection into an integral imaging monitor. The algorithm is based in the transformation properties of the plenoptic field captured with an array of digital cameras. We show that a small number of cameras can produce the microimages for displaying 3D scenes with resolution and parallax fully adapted to the monitor features.

Full-parallax 3D display from the hole-filtered depth information

2015

In this paper we introduce an efficient hole-filling algorithm for synthetic generation of microimages that are displayed on an integral imaging monitor. We apply the joint bilateral filter and the median filter to the captured depth map. We introduce in any step of the iterative algorithm with the data from a new Kinect capture. As a result, this algorithm can improve the quality of the depth maps and remove unmeasured depth holes effectively. This refined depth information enables to create a tidy integral image, which can be projected into an integral imaging monitor. In this way the monitor can display 3D images with continuous views, full parallax and abundant 3D reconstructed scene fo…

Depth rendering of large incoherent scenes from integral images

2016

Integral imaging is a technique that provides the spatial and angular information of three-dimensional (3D) scenes through a single shot. Taking advantage of this capability, different applications have been developed. Some of these applications are the 3D display and digital post-processing, in particular depth-reconstruction from integral images.

Acoustic rendering of particle-based simulation of liquids in motion

2009

In interaction and interface design, the representation of continuous processes often uses liquid metaphors, such as dripping or streaming. When an auditory display of such processes is required, an approach to sound-synthesis based on the physics of liquids in motion would be the most convincing, especially when real-time interaction is into play. In order to bridge the complexity of fluid-dynamic simulations with the needs of interactive sonification, we propose a multi-rate sound synthesis of liquid phenomena. Low-rate smoothed-particle hydrodynamics is used to model liquids in motion and to trigger sound-emitting events. Such events, such as solid-liquid collision, or bubble formation, …

AnyDSL: a partial evaluation framework for programming high-performance libraries

2023

This paper advocates programming high-performance code using partial evaluation. We present a clean-slate programming system with a simple, annotation-based, online partial evaluator that operates on a CPS-style intermediate representation. Our system exposes code generation for accelerators (vectorization/parallelization for CPUs and GPUs) via compiler-known higher-order functions that can be subjected to partial evaluation. This way, generic implementations can be instantiated with target-specific code at compile time. In our experimental evaluation we present three extensive case studies from image processing, ray tracing, and genome sequence alignment. We demonstrate that using partial …

Online reading as an individual and social practice

2012

NEW IRANIAN GRAPHIC DESIGN'S IDENTITY THROUGH THE UNITY AND THE MULTIPLICITY

2008

The meaning of the term progettare (to design) comes from the Latin projectare, to cast forward, and as an arrow must be drawn back with effort to be shot from a bow, analogously there exists in design two essential moments, the link with the past and the projection into the future. This is particularly true for Iranian graphics that sinks its strong roots into a terrain constituted by a long tradition of typography and by an equally important and ancient calligraphic tradition that moves sinuously along the curved lines of Farsi characters that compose the alphabet of the official Persian language.

What characterizes Norwegian nursing students’ reflective journals during clinical placement in an African country?

2015

Abstract Introduction An increasing number of Norwegian nursing students take part in exchange programmes in African countries. Reflective journals are often used to enhance clinical placements learning outcomes. Aim To identify the features that characterized students' experiences reported in their reflective journals during clinical placements in an African country in light of cultural competence. Methods Qualitative text analysis of 350 reflective journals written by 197 students taking part in an exchange programme in one of three African countries. Results The reflective journals were characterized by the students' personal emotions, judgements of others and comparisons between what th…

Measuring electrostatic double-layer forces on HOPG at high surface potentials

1999

Abstract The aim of this study was to investigate surface forces in aqueous electrolyte solutions between surfaces with high electric potentials. Therefore the force between a surface of highly oriented pyrolytic graphite (HOPG) and a silicon nitride tip of an atomic force microscope was measured. Various electric potentials by a counter electrode were applied to the HOPG, which served as working electrode. As predicted by the Poisson–Boltzmann theory the electrostatic double-layer force changed only in a narrow potential range of ≈300 mV. At high negative sample potentials, where the negatively charged tip was repelled from the sample, the force saturated. At positive potentials an attract…