Visualization Of 3D Objects Research Articles

Visions Project K. 1 DIY: 3D Interactive Device

The Visions Project K. 1 is an interactive video installation consisting of a volumetric device that allows visualization of 3D objects and their interaction with the user in real time. Objects are projected onto a pyramidal structure with an LCD monitor, and due to the special geometry of the structure, they look like real 3D objects floating inside the pyramid for any observer from any direction. The modular design of the components of the structure enables the user to build his or her own device DIY (Do It Yourself).

A Navigation-Aided Framework for 3D Map Views on Mobile Devices

The visualization of 3D objects on maps in mobile devices could enhance user perception of the objects on the map. However, in order to improve the interaction of the user with the mobile device that contains the 3D map for navigation, the path and location should be represented with a reasonable degree of accuracy and true to life. This paper utilizes a familiar concept of computational geometry that can be applied to the description of points and the path from one point to another: the Voronoi diagram conceptualizes the visualization of 3D objects on a 3D map in a mobile device used for navigation. The reason for considering Voronoi for this concept is that a system based on Voronoi was found to have a well-known geometric structure. This is similar to the fundamental construct of a navigation aid, which naturally evolves as a discrete set of points in moving from one location to another. The result of our concept could be implemented in the design of a device to aid navigation.

Distortion-free wide-angle 3D imaging and visualization using off-axially distributed image sensing.

We propose a new off-axially distributed image sensing (ODIS) using a wide-angle lens for reconstructing distortion-free wide-angle slice images computationally. In the proposed system, the wide-angle image sensor captures a wide-angle 3D scene, and thus the collected information of the 3D objects is severely distorted. To correct this distortion, we introduce a new correction process involving a wide-angle lens to the computational reconstruction in ODIS. This enables us to reconstruct distortion-free, wide-angle slice images for visualization of 3D objects. Experimental results are carried out to verify the proposed method. To the best of our knowledge, this is the first time the use of a wide-angle lens in a multiple-perspective 3D imaging system is described.

Visualization of 3D Objects in Scattering Medium Using Axially Distributed Sensing

We present a method to visualize 3D objects in scattering media using the axially distributed sensing method. The scattered elemental images of the 3D objects in scattering media are obtained by moving the camera along the common optical axis. To reduce the scattering effect of the recorded elemental images, a statistical image processing algorithm is applied to the scattering elemental images and the estimated elemental images with the reduced scattering effects are obtained. The estimated elemental images of the objects are used to visualize the 3D scene using the computational reconstruction algorithm based on ray back-projection. We present preliminary experimental results to illustrate how the scattering effects may be reduced by the proposed method.

Multiscale acquisition and presentation of very large artifacts

The dichotomy between full detail representation and the efficient management of data digitization is still a big issue in the context of the acquisition and visualization of 3D objects, especially in the field of the cultural heritage. Modern scanning devices enable very detailed geometry to be acquired, but it is usually quite hard to apply these technologies to large artifacts. In this article we present a project aimed at virtually reconstructing the impressive (7×11 m.) portal of the Ripoll Monastery, Spain. The monument was acquired using triangulation laser scanning technology, producing a dataset of 2212 range maps for a total of more than 1 billion triangles. All the steps of the entire project are described, from the acquisition planning to the final setup for dissemination to the public. We show how time-of-flight laser scanning data can be used to speed-up the alignment process. In addition we show how, after creating a model and repairing imperfections, an interactive and immersive setup enables the public to navigate and display a fully detailed representation of the portal. This article shows that, after careful planning and with the aid of state-of-the-art algorithms, it is now possible to preserve and visualize highly detailed information, even for very large surfaces.

A method for voxel visualization of 3D objects

In the paper, a method for forming data structures for voxel description of volume objects is suggested. An approach for projecting octant trees (octrees) is formulated and described. A method for visualization of volume data represented by a voxel octree with removing invisible objects is suggested. We formulate a rule for the choice of transversal order for recursive structure for forming an image with removing invisible parts, which makes it possible to reduce the time of priority calculations in sorting voxels by the distance to the observer. Formation of topology of voxel projection images of three types and the corresponding data structures are considered. A space of 3D object mappings represented by voxel octant trees is discussed.

The Use of MC# Language for Implementation of Parallel Algorithms in 3D Simulation

Parallelizm of the real-time visualization of 3D objects is considered in the paper. A 3D space model and its implementation using parallel programming are proposed.