A5080611405- Advanced Optical Imaging Technologies
- Visual perception and processing mechanisms
- Computer Graphics and Visualization Techniques
- Data Visualization and Analytics
- Advanced Vision and Imaging
- Geological Modeling and Analysis
- Virtual Reality Applications and Impacts
- Image and Video Quality Assessment
- Visual Attention and Saliency Detection
- CCD and CMOS Imaging Sensors
- Aesthetic Perception and Analysis
- Neural and Behavioral Psychology Studies
- Ophthalmology and Visual Impairment Studies
- Visual and Cognitive Learning Processes
- Tactile and Sensory Interactions
- Geographic Information Systems Studies
- Advanced Image Processing Techniques
- Spatial Cognition and Navigation
- Aortic Disease and Treatment Approaches
- Interactive and Immersive Displays
- Aortic aneurysm repair treatments
- Cardiac Valve Diseases and Treatments
- 3D Surveying and Cultural Heritage
- Advanced Computational Techniques and Applications
- 3D Shape Modeling and Analysis
King's College London
2022-2023
Newcastle University
2015-2022
Curtin University
2022
Waseda University
2022
Knexus Research (United States)
2022
University of York
2014-2015
Durham University
2004-2013
Sharp Laboratories of Europe (United Kingdom)
1995-2001
The development of affordable digital technologies that allow the collection and analysis georeferenced field data represents one most significant changes in field-based geoscientific study since invention geological map. Digital methods make it easier to re-use pre-existing (e.g. previous data, geophysical survey, satellite images) during renewed phases fieldwork. Increased spatial accuracy from laser positioning systems provides access geostatistical geospatial analyses can inform...
We are interested in metrics for automatically predicting the compression settings stereoscopic images so that we can minimize file size, but still maintain an acceptable level of image quality. Initially investigate how Peak Signal to Noise Ratio (PSNR) measures quality varyingly coded pairs. Our results suggest symmetric, as opposed asymmetric stereo compression, will produce significantly better results. However, PSNR widely criticized correlating poorly with perceived visual therefore...
Stereoscopic images are hard to get right, and comfortable often only produced after repeated trial error. The main difficulty is controlling the stereoscopic camera parameters so that viewer does not experience eye strain or double from excessive perceived depth. Additionally, for head tracked displays, objects can distort as moves look around displayed scene. We describe a novel method calculating with following contributions: (1) Provides user intuitive controls related easily measured...
The usable perceived depth range of a stereoscopic 3D display is limited by human factors considerations to defined around the screen plane. There therefore need in image creation map from scene target without exceeding these limits. Recent capture methods provide precise control over this mapping but single as whole and are unable give preferential representation particular region interest scene. A new approach described that allows have an improved compared other regions For example game...
This paper presents an examination of the requirements for observer tracking autostereoscopic 3D display systems. The optical imaging viewing windows in order to maintain high image quality over a large range positions are described. A number novel displays based on LCD (liquid crystal display) technology have been developed and demonstrated at Sharp Laboratories Europe Ltd (SLE). includes electronically switchable illuminator macro-optic twin-LCD display; compact micro-optic which maintains...
Existing stereoscopic imaging algorithms can create static images with perceived depth control function to ensure a compelling 3D viewing experience without visual discomfort. However, current do not normally support standard Cinematic Storytelling techniques. These techniques, such as object movement, camera motion, and zooming, result in dynamic scene change within between series of frames (shots) cinematography. In this study, we empirically evaluate the following three types approaches...
This paper presents a new autostereoscopic display system based on conventional Thin Film Transistor Liquid Crystal Display technology giving bright, high quality, full color and resolution 3D images over wide viewing range without special glasses. In addition, image look-around multiple viewers are possible. Methods of obtaining improved quality described as well interfacing with video computer generation sources. The is suitable for number professional domestic applications.
Objectives To provide estimates for how different treatment pathways the management of severe aortic stenosis (AS) may affect National Health Service (NHS) England waiting list duration and associated mortality. Design We constructed a mathematical model excess found closed-form analytic solution to that model. From published data, we calculated strategies listed under Interventions time clear backlog patients Setting The NHS in England. Participants Estimated with AS (1) Increasing capacity...
The creation of binocular images for stereoscopic display has benefited from significant research and commercial development in recent years. However, perhaps surprisingly, the effect adding 3D sound to rarely been studied. If auditory depth information can enhance or extend visual experience it could become an important way limited budget on all displays reduce potential fatigue excessive use disparity. Objective: As there is this area our objective was ask two preliminary questions. First...
Complications exist when describing the dimensionality of geoscientific data sets. One difficulty is that there are a number different, valid ways to consider dimensionality. Unlike traditional methods field capture, modern digital typically record position every sample point relative three-dimensional (3D) coordinate system, even for simple measurement strategies such as 1D line sampling. Critically, best way describe set will depend on context in which presented. Terms "2½D" generally...
Context: The idea behind stereoscopic displays is to create the illusion of depth and this concept could have many practical applications. A common spatial ability test involves mental rotation. Therefore a rotation task should be easier if being undertaken on screen. Aim: aim project evaluate (3D screen) assess whether they are better for performing certain than over 2D display. secondary was perform similar study but replicating conditions using mobile phone Method: We devised involving...
Desktop 3D displays vary in their optical design and this results a significant variation the way which stereo images are physically displayed on different displays. When precise depth judgements need to be made these differences may become critical task performance. Applications where is particular issue include medical imaging, geoscience scientific visualization. We investigate perceived thresholds for four classes of desktop display; full resolution, row interleaved, column interleaved...
Standard models of visual search have focused upon asking participants to for a single target in displays where the objects do not overlap one another, and are presented on depth plane. This stands contrast many everyday searches wherein variations norm, rather than exception. Here, we addressed whether presenting overlapping different depths planes another can improve performance. Across 4 experiments using stimulus types (opaque polygons, transparent opaque real-world objects, X-ray...
Node-link visual representation is a widely used tool that allows decision-makers to see details about network through the appropriate choice of metaphor. However, existing visualization methods are not always effective and efficient in representing bivariate graph-based data. This study proposes novel node-link model — entropy (Vizent) graph effectively represent both primary secondary values, such as uncertainty, on edges simultaneously. We performed two user studies demonstrate efficiency...
Multiview auto-stereoscopic displays support both stereopsis and head motion parallax depth cues could be superior for certain tasks. Previous work suggests that a high viewpoint density (100 views/10cm at the eye) is required to convincingly parallax. However, it remains unclear how affects task performance, this factor critical in determining display system design requirements. Therefore, we present simulated multiview apparatus undertake experiments using path-searching which control two...
We believe the need for stereoscopic image generation methods that allow simple, high quality content creation continues to be a key problem limiting widespread up-take of 3D displays. present new algorithms creating real time images provide increased control creators over mapping depth from scene displayed image. Previously we described Three Region, variable mapping, algorithm generation. This allows different regions within represented by ranges perceived in final An unresolved issue was...
We report on a new game design where the goal is to make stereoscopic depth cue sufficiently critical success that play should become impossible without using 3D (S3D) display and, at same time, we investigate whether S3D affected by screen size. Before detail our review previously unreported results from research over last ten years Durham Visualisation Laboratory. This demonstrates players can achieve significantly higher scores displays when judgements are an integral part of game....