In this paper, a new approach named focal region-based volume rendering for visualizing internal structures of volumetric data is presented. This approach presents volumetric information through integrating context information as the structure analysis of the data set with a lens-like focal region rendering to show more detailed information. This feature-based approach contains three main compo...

High-resolution simulations often rely on the Adaptive Mesh Resolution (AMR) technique to optimize memory consumption versus attainable precision. While this technique allows for dramatic improvements in terms of computing performance, the analysis and visualization of its data outputs remain challenging. The lack of effective volume renderers for the octree-based AMR used by the RAMSES simulat...

The decision to use either the Direct Volume Rendering paradigm or the Indirect Volume Rendering paradigm to visualize a volume dataset is a topical question in Volume Graphics. Unfortunately, it seems that this question has not been suuciently addressed so far and is not easy to answer. In this paper, we discuss some of the advantages and disadvantages of one candidate for each of these paradi...

We explore real time volume rendering of multichannel data for volumes with color and multi-modal information. We demonstrate volume rendering of the Visible Human Male color dataset and photo-realistic rendering of voxelized terrains, and achieve high quality visualizations. We render multi-modal volumes utilizing hardware programmability for accumulation level mixing, and use CT and MRI infor...

The Kubota 3D imaging and graphics accelerator, which provides advanced graphics for Digital's DEC 3000 AXP workstations, is the first desktop system to combine three-dimensional imaging and graphics technologies, and thus to fully support volume rendering. The power of the Kubota parallel architecture enables interactive volume rendering. The capability for combining volume rendering with geom...

Template-based volume rendering is an acceleration technique for volume ray casting. It does not trade-off the image quality for the rendering speed. However it is still fall short of interactive manipulation of volume data, mainly due to the ray-by-ray volume access pattern and the long ray path in the transparent regions. In this paper, we present an object-order template-based volume renderi...

This paper concerns a new sub-field of computer graphics, namely volume graphics, which aims to develop voxel-based modelling and rendering techniques for general purpose graphics in addition to its original playing field, volume visualisation. Building upon our recent work on the modelling of graphics scenes composed of multiple volumetric datasets, we present three different algorithms for re...

This paper proposes a method to control the object enhancement in context region in focal region based volume rendering. The proposed method uses the distance as a factor to control the volume features in the context region. The main contributions are as follows: To introduce the distance into the rendering pipeline for volume feature enhancement; To demonstrate the implementation of how to use...

Classical direct volume rendering techniques accumulate color and opacity contributions using the standard volume rendering equation approximated by alpha blending. However, such standard rendering techniques, often also aiming at visual realism, are not always adequate for efficient data exploration, especially when large opaque areas are present in a dataset, since such areas can occlude impo...