Dynamic Indirect Illumination in Real-Time Ray Tracing using Lightcuts

This thesis describes a system that adds plausible indirect illumination to the Arauna real-time ray tracer. Only the first diffuse reflection of light on static geometry is simulated. Light sources are allowed to be dynamic. Virtual point lights (VPLs) are used to simulate the reflection of light by surfaces. Their contribution to the final...

Clutter and Realism: An investigation on the effect of clutter on the perceived realism of 3d computer generated renderings

Current "Philips" practices include development of physical environments in which luminaires can be tested with the user. However "Philips" is also interested in virtual prototyping and thus is turning towards identifying a number of features in 3d environments which influence the human perception of realism. This study utilizes traditional...

Flexible Smart Display with Integrated Graphics Rasterizor using Single Grain TFTs

Flexible electronics is a fast emerging market and includes electronics fabricated on flexible substrates, large area displays, low cost and disposable electronics. Both research and commercial institutions around the world have been trying to develop low temperature processes which will enable fabrication of electronic devices on arbitrary...

The Unified Anatomical Human: Model-based Visualization of Heterogeneous Anatomy Data

In the course of anatomical research, anatomists acquire and attempt to organize a great deal of heterogeneous data from different sources, such as MRI and CT data, cryosections, immunohistochemistry, manual and automatic segmentations of various structures, related literature, the relations between all of these items, and so forth. Anatomical...

A Declarative Approach to Procedural Generation of Virtual Worlds

With the ever increasing costs of manual content creation for 3D virtual worlds, the potential of generating content automatically becomes too attractive to ignore. However, for most designers, procedural generation methods are complex and unintuitive to use, and offer little user control. Furthermore, due to their specialized nature, separately...

Visualization on a Budget for Massive LiDAR Point Clouds

The recent emergence of LiDAR scanning technology has resulted in the availability of very large three dimensional point cloud data sets. An example of such a data set is the AHN2 data set, which contains a high-density point cloud for the Netherlands. The direct visualization of these point cloud data sets is important because it provides the...

Spatial Navigation for Context-aware Video Surveillance

An increasing number of cameras is being used to monitor a growing range of environments. Consequently, surveillance systems consist of an increasing number of screens to display all incoming video streams, making it difficult for observers to maintain a mental model of spatial relations between videos. A number of systems is developed aiming at...

Game Level Design using Procedural Natural Systems

Due to an increase in scale and amount of detail needed for next gen games, the time required to design a game world has increased dramatically. Even though more advanced tools have become available, designing a game world is still largely done by hand. One area that suffers substantially from this is the design of large scale natural phenomena...

Techniques and architectures for 3D interaction

Spatial scientific datasets are all around us, and 3D visualization is a powerful tool to explore details and structures within them. When dealing with complex spatial structures, interactive Virtual Reality (VR) systems can potentially improve exploration over desktop-based systems. However, from previous experience it was found that...

Progressive visualization of incomplete sonar-data sets: From sea-bottom interpolation and segmentation to geometry extraction

This thesis describes a visualization pipeline for sonar profiling data that show reflections of multiple sediments in the sea bottom and that cover huge survey areas with many gaps. Visualizing such data is not trivial, because they may be noisy and because data sets may be very large. The developed techniques are: (1) Quadtree interpolation...

Extraction and visualization of geometries in fluid flow fields.

Multiring Differential Chain Coding for line drawings

A new type of chain codes, named multiring differential chain code (MRDCC), is introduced. The distortion and coding rate are investigated and compared with the standard chain code (SCC), multiring chain code (MRCC) and differential chain code (DCC). The results show that MRDCC offers the highest performance among these codes. The experimental...

Predesign for flow visualizer. Project: Flow Graphics, Work package: Visualizer for 3D flow-calculation results

The results of calculations of two- and three-dimensional flows on blocked grid domains consist of vast data collections with a simple, regular structure. The inspection of these results can only be done efficiently by graphical means, and by exploiting the regular structure of the data. There is a large similarity between the format of the...