Aiming at the detail rendering in volume data, a new volume illumination model, called Composed Scattering Model (CSM), is presented. In order to enhance different details in volume data, scattering intensity is decomposed into volume scattering intensity and surface scattering intensity with different weight functions. According to the Gauss probability distribution of gray and gradient of dat...

We present three examples of interactive, 3D volume rendering models embedded in a PDF publication. The examples are drawn from three different morphological methods - confocal microscopy, serial sectioning and microcomputed tomography - performed on members of the phylum Mollusca. A description of the entire technical procedure from specimen preparation to embedding of the visual model includi...

Volume rendering not only produces high quality 3D images of single organs directly from the intensity data in cr. MR, SPECf, PET, and ultrasound images, but it also can b:e used to show the relationship among multiple anatomic, treatment, and image objects. In this paper we will explain methods, show results, and discuss the effectiveness of 1. simultaneously volume rendering multiple organs f...

c s The task of the rendering process is to display the primitives used to represent the 3D volumetri cene onto a 2D screen. Rendering is composed of a viewing process which is the subject of this paper, b and the shading process. The projection process determines, for each screen pixel, which objects are seen y the sight ray cast from this pixel into the scene. The viewing algorithm is heavily...

c s The task of the rendering process is to display the primitives used to represent the 3D volumetri cene onto a 2D screen. Rendering is composed of a viewing process which is the subject of this paper, b and the shading process. The projection process determines, for each screen pixel, which objects are seen y the sight ray cast from this pixel into the scene. The viewing algorithm is heavily...

In medical visualization, 2D slice images of human volume data are important as well as 3D volume rendering. The slice images are advantageous in focusing on regions of interest, while the volume rendering enables us to easily observe the whole region. In this paper, we propose a method to (1) create a transparent slice image, where its opacity is controllable by a user-defined transfer functio...

Volume data often have redundant information for clinical uses. The essence of volume rendering can be regarded as a mechanism to determine visibility of redundant information and structures of interest using different approaches. Controlling the visibility of these structures in volume rendering depends on the following factors in existing rendering algorithms: The data value of current voxel ...

This dissertation gives accurate and efficient methods for the object-order rendering of discrete objects. Discrete objects are typically represented with a volume raster and rendered with a volume rendering algorithm. However, current object-order volume rendering algorithms suffer from several problems. First, they require that the volume raster be traversed in a strict visibility order, but ...