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Topic: Voxel

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In the News (Thu 24 May 18)

  Voxel - Wikipedia, the free encyclopedia
A voxel (a portmanteau of the words volumetric and pixel) is a volume element, representing a value in three dimensional space.
Voxels are frequently used in the visualisation and analysis of medical and scientific data.
Voxels can contain multiple scalar values what essentially is a vector data; in the case of ultrasound scans with B-mode and Doppler data, density, and volumetric flow rate are captured as separate channels of data relating to the same voxel positions.
en.wikipedia.org /wiki/Voxel   (480 words)

 [No title]   (Site not responding. Last check: 2007-11-03)
Voxels, the volumetric equivalent of a pixel, are a popular representation scheme for volumetric data, and have been used in recent volume reconstruction work.
A voxel is visible if the projection of the voxel to the image is within the boundaries of the image, and no closer voxel in the model projects to the same image location.
The distance between the voxel and the image is computed, and is compared to the distance to other voxels which projected to the same image location, the closest voxel is stored associated with this pixel location.
web.qx.net /lizjones/steve/paper1.txt   (3257 words)

 Voxel at opensource encyclopedia   (Site not responding. Last check: 2007-11-03)
de:Voxel A voxel is a three-dimensional pixel (a volume pixel) that is, a pixel with a third coordinate after the usual pair.
Voxels are often used in computer graphics to obtain an approximation of 3D displays.
A single "layer" of voxels is not a 3D display in the strict sense: if we assume that the coordinates refer to a plane, only one height is possible at any given position, and so multiple objects at the same planar position are not possible.
www.wiki.tatet.com /Voxel.html   (164 words)

 snarfed.org :: voxel   (Site not responding. Last check: 2007-11-03)
Voxel Hunt is Copyright 2000, Ryan Barrett, and is distributed under the GPL.
Voxel Hunt uses a voxel renderer to display terrain that is higher resolution than poly-based terrain on similar hardware.
Voxel Hunt uses a heightmap to generate its height field, and an interpolated color map that is generated from the heightmap at run time.
snarfed.org /space/Voxel   (515 words)

 The Great Alternative : Voxel Polygons   (Site not responding. Last check: 2007-11-03)
A voxel map is a huge array, with for each location on the map a color and a height.
Good thing about voxel engines is that their speed is virtually constant: No matter how much detail there is in the scene, it is drawn at (almost) the same speed.
The usual voxel algorithm assumes that each bar starts at the bottom screen line, so that overdraw can be eliminated by clipping subsequent bars against the height as indicated by the array that I mentioned before.
www.theparticle.com /voxelpolies.html   (1241 words)

 Steve Seitz's Voxel Coloring Page
That is, we represent the environment as a discretized set of voxels, and use an algorithm that traverses these voxels and colors those that are part of a surface in the scene.
That is, we can first visit all voxels in the "layer" immediately adjacent to the convex hull of the cameras, then visit all voxels in the next layer immediately adjacent to the first layer, and so on.
Below are two examples of the voxel coloring algorithm, one of a scene containing a toy dinosaur (6cm x 8cm x 10cm), and the other of a real rose.
www-2.cs.cmu.edu /~seitz/vcolor.html   (972 words)

 Voxel Communications :: Bridging the gap
Voxel Communications is a provider of top notch offshore customer contact solutions, our customized solutions primarily entail inbound and outbound telemarketing and business process outsourcing.
Voxel communications bridges the gap by becoming the partner with you to provide the highest quality customer services solutions.
Voxel communications is a state of art technology facility and is available 24/7/365 round the clock round the year.
voxelnet.com   (183 words)

 What is voxel? - A Word Definition From the Webopedia Computer Dictionary
Voxelization is the process of adding depth to an image using a set of cross-sectional images known as a volumetric dataset.
Voxel images are primarily used in the field of medicine and are applied to X-Rays, CAT (Computed Axial Tomography) Scans, and MRIs (Magnetic Resonance Imaging) so professionals can obtain accurate 3D models of the human body.
Voxel imaging is also being used to create computer games, so 3D acceleration is not necessary.
www.webopedia.com /TERM/V/voxel.html   (304 words)

 TiberiumSun.com - Features   (Site not responding. Last check: 2007-11-03)
Voxel processing is a means of visualizing 3-dimensional shapes and structures implied by a series of cross-sectional images.
Voxel processing presupposes that a series of cross-sectional images, representing some volume which was regulary sampled at some constant interval, exists in digital form.
Because voxels, by definition, exist in 3 dimensions, any voxel has the capability of obscuring the view of any other voxel, depending on the orientation of the dataset.
www.tiberiumsun.com /features/voxel.shtml   (745 words)

 Voxel-Based Graphics on Intel Architectures   (Site not responding. Last check: 2007-11-03)
Voxel Graphics is a means of modeling 3D objects with sampled points (voxels) instead of surfaces.
Voxel data structures ease operations such as detecting collisions and modifying the environment.
This is a major difference with polygon models in which the complexity of the model effects the number of polygons and texture, and heavily impact the memory footprint.
developer.intel.com /cd/ids/developer/asmo-na/eng/dc/pentium4/optimization/20283.htm   (712 words)

 Voxel Demo for 89 - ticalc.org
While voxels have been largely surpassed by polygonal graphics, they are still in limited use.
Voxels are points or pixels that are plotted in 3d, with an x, y, and z axis.
Of course i dont actually know how to use voxels and that is just an example to help with understanding of the basic idea, so that might not be the right way to think about it.
www.ticalc.org /archives/news/articles/10/102/102632.html   (755 words)

 Voxel Traversal Math - GameDev.Net Discussion Forums
This is done by calculating the distance to the plane(very simple as it's all orthogonal) then calculating the time it takes to reach the plane, using the relatant component of the velocity(again very simple and quick as everything is nicely aligned).
and curlen is length to intersection with neighbour voxel border.
Voxels look great for small jumps, but the octree method looks better for big jumps.
www.gamedev.net /community/forums/topic.asp?topic_id=263736   (443 words)

 [No title]
Voxels were those 3D pixel mutations that promised a new future for gaming environments.
Voxels reared their ugly heads in the late 90s (can you say Outcast?), but they just didn’t seem to catch on.
And so, Game.Ars remembers the voxel (heck, I had to think of something to intro the column), a forgotten graphics gremlin that appeared in some memorable games but just couldn’t stand up to the mighty polygon.
arstechnica.com /articles/columns/game/games-20050219.ars   (854 words)

 Volume Graphics - About Voxels   (Site not responding. Last check: 2007-11-03)
Volume rendering, or more generally spoken volume graphics, is a sub-specialty of 3D computer graphics which is concerned with the discrete representation and visualization of objects represented as sampled data in three or more dimensions.
The term voxel is used to characterize a volume element; it is a generalization of the notion of pixel that stands for a picture element.
Volume graphics or volume rendering has inherent advantages for applications needing visualization of irregular objects, or where the interior structure is important, or where high level of details and realism is essential - e.g., representations of the human body.
www.volumegraphics.com /solutions/voxels.html   (237 words)

Voxel objects are stored as a three dimensional map of matter, with each voxel (or texel in a volume map) indicating something about that “lump” of matter — its colour, translucency, or “power” in the case of metaballs.
In the “power” case, a threshold value is used; voxel values that are above (or below) this value are considered to be solid matter, with the rest considered to be empty space.
Typically, voxel objects are converted to polygons before rendering using the “marching cubes” algorithm, or similar.
www.pvrdev.com /pub/PC/eg/h/Voxel.htm   (162 words)

 Voxel anisotropy and interpolation to cubic voxels
For example, if your file has a voxel x size of 2.5 and a voxel y size of 1.25, interpolation will lead to an x dimension that is twice the original x dimension minus one (assuming that the z dimension is greater than or equal to 1.0).
It is possible to use the program manualreslice to interpolate a file to cubic voxels or to specify a.air file to perform this transformation by specifying rotations and translations of zero and scaling factors of 1.0.
Please be aware that manualreslice uses a center-of-file-as-origin model by default and consequently may not produce the same result that would have been obtained using the automatic interpolation function used elsewhere in the AIR package.
bishopw.loni.ucla.edu /AIR5/interpolate.html   (750 words)

 Apple - Science - Voxel, Inc.
But now, Voxel’s Mac-based Digital Holography System gives surgeons a life-size, 3D X-ray view of the patient — not to mention a dramatically improved level of confidence during high-stakes surgeries.
It has a broad range of applications, from education to astrophysics, but Voxel’s primary market focus is orthopedic surgeons and neurosurgeons, who can use the system for everything from surgical planning to more accurately visualizing surgeries while they are underway.
The system has proven highly effective in diagnosing conditions that are difficult or impossible to detect with existing technology, reducing the time required to arrive at high-confidence diagnoses, and facilitating communication in referring physicians and patients — not to mention dramatically increasing surgical confidence.
www.apple.com /science/profiles/voxel   (675 words)

 voxel - a definition from Whatis.com   (Site not responding. Last check: 2007-11-03)
Since a pixel (picture element) defines a point in two dimensional space with its x and y coordinates, a third z coordinate is needed.
Medical practitioners and researchers are now using images defined by voxels and 3-D software to view X-rays, cathode tube scans, and magnetic resonance imaging (MRI) scans from different angles, effectively to see the inside of the body from outside.
2) Voxel is also a company that makes a scanning camera that will produce 3-D images of the inside of the human body by using a patented digital holography system.
whatis.techtarget.com /definition/0,,sid9_gci213321,00.html   (262 words)

 Effect of Voxel Position on Single-Voxel MR Spectroscopy Findings -- Ricci et al. 21 (2): 367 -- American Journal of ...
The spectroscopy voxel is positioned centrally in an enhancing portion of the tumor and does not include the enhancing edge.
That voxel position is critical to the accuracy of MR spectroscopy
The MR spectroscopy voxel is centrally positioned within the enhancing lesion.
www.ajnr.org /cgi/content/full/21/2/367   (4010 words)

 Voxel Graphics and Volume Rendering I
It is possible to do volume rendering using 2D textures, but imagine a cubic voxel data set, to be rendered it has to be sliced into a three sets of parallel quad planes, each set normal to each of the cube axis.
A "world" coordinate system is defined so that the voxels near the lower left corners becomes (0,0,0), and the voxel farthest away at the opposite diagonal has coordinates (L,M,N).
In general the quads are derived from the interpolated value at the intersection of the voxel set with a set of planes perpendicular to the major axis of the cube.
prosjekt.ffi.no /unik-4660/lectures04/chapters/Voxel1.html   (2287 words)

 [TS- FS] Adding a Voxel Ingame - Revora Forums
First you are going to have to make a voxel, or if you don't wish to do that feel free to download and use my hum-vee voxel (adding to YR Arg later this week).
If you are replacing a unit already in-game all you would have to do is name your voxel and HVA the same as the art.ini code for that unit.
Be sure that the text is the same as the name of your voxel, and the same text that you entered in the rules.ini.
forums.revora.net /index.php?showtopic=21771   (613 words)

 Voxel   (Site not responding. Last check: 2007-11-03)
I am interested in 3d graphics and lately have heard the term "voxel" a few times.
Response #: 1 of 1 Author: hawley A voxel is the 3-dimensional equivalent of a "pixel".
Just as pixel is short for "picture element", voxel is short for either "volume element" (no X there, though) or "volume pixel."
www.newton.dep.anl.gov /newton/askasci/1995/compsci/CSI20.HTM   (88 words)

 Blue's News: News Comments
Also, voxels are actually a target of the future, not of the past.
The problem with implimentation is it requires large amounts of memory (X1xY1xZ1), but overcomming that limitation gives you very realistic objects that can be "opened" and broken apart to reveal the innards.
Nvidia has experiemented with rendering voxels in hardware, and there are software packages available to actually use the nvidia GPU to start moving back to voxels.
www.bluesnews.com /cgi-bin/board.pl?action=userinfo&user=14830&boardid=1   (680 words)

 Dreamcast Homebrew :: Dreamcast software News :: Dreamcast Emulation & Development News   (Site not responding. Last check: 2007-11-03)
This is based upon the 6 degrees of freedom Voxel Landscape engine by Andrey Serba (http://immerse.km.ru).
Most voxel renderers only allow for 4 degrees of freedom, and were initially software rendered.
This however utilizises KallistiGL for Hardware rendering of the raycasts used to draw the landscape, and produces decent framerates on the dreamcast due to extensive use of the sh4 fpu.
www.dchomebrew.org /voxel.shtml   (141 words)

 Jason Doucette - Projects / Games - Real Time Computer Graphics, Physics Simulations
Voxel Terrain is a full 3D photo-realistic terrain rendering engine.
My voxel technology would be a great engine for any gaming system that lacks a 3D accelerator, such as the Game Boy Advance (GBA) or other hand held devices.
My voxel engine is far superior to conventional polygon engines for the purposes of generating real-time terrain.
www.jasondoucette.com /games.html   (7156 words)

 VoxRend: Voxel Engine
VoxRend will be a voxeled graphic engine, simple but powerful, to build 3D games easily.
There aren't tools for voxel object editing (the only one I've found is "slabspri" by Ken Silverman) so it would be cool to code a new one.
A voxel engine created by Ken Silverman, the guy who made the engine used in Duke Nukem 3D, Shadow Warrior, Blood and others.
voxrend.sourceforge.net   (474 words)

 Voxel Dot Net
Voxel Dot Net is a leading provider of managed hosting services designed for any organization that requires a robust Internet presence.
Voxel Dot Net Joins Switch and Data’s PAIX Internet Exchange in New York
Voxel Dot Net Joins Equinix's Internet Business Exchange In Washington D.C. Voxel Dot Net Combines Strategic Hosting Facility and Dark Fiber to Extend Reach
www.voxel.net   (151 words)

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