[x3d-public] Extensible 3D (X3D), ISO/IEC 19775-1:2013, 3 Definitions, acronyms, and abbreviations: got voxel?

John Carlson yottzumm at gmail.com
Tue Jul 21 12:25:43 PDT 2020


I cannot remember whether they chose square or rectangular pixels for high
definition TV.

I think that rectangular might be preferable, or it might sow confusion
where people are asking for the aspect ratio of a pixel.

John

On Tue, Jul 21, 2020 at 2:16 PM Don Brutzman <brutzman at nps.edu> wrote:

> Thanks Dick.  Please share SOED definition of voxel (and url if available)
> so that we can see if everyone agrees the definition is clear.
>
> I was in a geospatial meeting earlier today where they announced they were
> working on a definition for voxel.  Will compare when that emerges.
>
> Point of comparison follows from wiktionary:
>
> [1] wiktionary: voxel
>      https://en.wiktionary.org/wiki/voxel
>
> "(computer graphics) the three-dimensional analogue of a pixel; a volume
> element representing some numerical quantity, such as the colour, of a
> point in three-dimensional space, used in the visualisation and analysis of
> three-dimensional (especially scientific and medical) data"
>
> On 7/21/2020 10:40 AM, Richard F. Puk wrote:
> >
> > Hi, Don --
> >
> > Both pixel and voxel are defined in the SOED. However, the definition of
> pixel is problematical while the definition of voxel  is clear and is as
> intended in the spec. Therefore, the term pixel does need a definition
> while the definition of voxel is as defined in the SOED and therefore does
> not need a definition.
>
> meanwhile, unchanged:
>
> [2] Extensible 3D (X3D) Part 1: Architecture and base components
>      clause 3 Terms, definitions, acronyms, and abbreviations, 3.1.53 pixel
>
> https://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/glossary.html#Pixel
>
> "one element of an image specified as a matrix of colour elements"
>
> TODO: we should add lower-case bookmarks as well.
>
> [3] wiktionary, pixel
>      https://en.wiktionary.org/wiki/pixel#English
>
> 1. One of the tiny dots that make up the representation of an image in a
> computer's memory.
> 2. One of the squares that make up a pixel art work or a zoomed in image
> in a computer.
>
> all the best, Don
> --
> Don Brutzman  Naval Postgraduate School, Code USW/Br
> brutzman at nps.edu
> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
> X3D graphics, virtual worlds, navy robotics
> http://faculty.nps.edu/brutzman
>
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