HDTenEightyP/NetNews huggingface dataset:
From: agee9122@iscsvax.uni.edu
Newsgroups: comp.graphics
Subject: Help on Image Conversion Needed
Date: 5 Oct 92 14:54:03 GMT
Organization: University of Northern Iowa


I'm new on this list, so please excuse any breaches of protocol I inadvertently
make.

        I am a student of Physics at the University of Northern Iowa, and am
involved in research that has presently stalled for lack of a computer program. 
I need something to take a grey-scale computer image (tif or gif preferred, but
I can convert my pictures into any format) and turn it into a sequence of
numbers from 0-255 representing each pixel, and save these numbers into a text
file or somesuch so that we can take a 1-pixel cross-section of a picture and
graph it and curve-fit it.  We are running a MS-DOS486SX at 25MHz w/SVGA.  Any
help (program names, preferably shareware, ftp sites where such programs can be
found, or mailing the program UUencoded to me at IN%"AGEE9122@ISCSVAX.UNI.EDU")
would be greatly appreciated.

                                        Joel Agee

no .sig, just an attitude
From: iancu@iil.intel.com (Igal Iancu)
Newsgroups: comp.graphics
Subject: MAC vs. IBM
Date: 28 Sep 92 14:50:22 GMT
Organization: Intel
X-Newsreader: Tin 1.1 PL4



Hi,

Excuse me in advance if this is a FAQ: I have a friend working as a graphics
artists, who is used to the Mac environment with FreeHand and PhotoShop.  

I am trying to convince her to move to an X86 based machine, mostly because
of the prices issue.  Can anybody support me (or her) on this move?  What 
are the potential pitfalls when changing the environment?

Thanks,

Igal Iancu
Intel Corporation
iancu@iil.intel.com 
Newsgroups: comp.graphics
From: andrewsh@lonex.rl.af.mil (Harold G. Andrews II)
Subject: Re: Mountain Generation algorithms
Organization: Rome Laboratory, Griffiss AFB. NY
Date: Fri, 25 Sep 92 17:48:03 GMT

In article <1992Sep21.162059.11354@rmotion.on.ca> jack@rmotion.on.ca 
(Jack De Winter) writes:
>I was wondering if a kind soul out there would be able to
>suggest a good algorithm for generating a montain-like
>landscape or if they could point to a location where
>I could find such algorithms.
>
>In case you are wondering, I am simply interested in the
>algorithm for a small family project that I am doing for
>my mother's Christmas present.  The algorithm would
>add a really nice touch and any help would be greatly
>appreciated.
>
>Thanks for you time,
>Jack

A couple of sources come to mind.

"The Science of Fractal Images", Edited by H.O. Peitgen, and D. Saupe,
Springer-Verlag, ~1988 (I think)

"Fractals", J. Feder, Plemun Books, 1988

Both of these books discuss fractal techniques to generate artificial terrain.
The Peitgen book does something with Fourier transforms (I haven't had a
chance to read that section).  The Feder book describes something called
random translation surfaces, which is a slow way to generate a surface. 
Both of them discuss Random addition surfaces, which is a recursive method.

Enjoy...

-Andy

*******************************************************************************
* Harold G. "Andy" Andrews II             *  Support DAM...                   *
* andrewsh@lonex.rl.af.mil                *                                   *
* Rome Laboratory/OCPA                    *   Mothers Against Dyslexia        *
* Air Force Photonics Center              *                                   *
* Griffiss AFB, NY 13441-5700             *                                   *
* (315) 330-7669  (DSN Prfx 587)          * (Not an official  USAF viewpoint) *
*******************************************************************************
From: colins@odie.cs.mun.ca (Colin James Stuckless)
Newsgroups: comp.graphics
Subject: Looking for the cloudless earth pictures
Keywords: Earth, Picture
Date: 27 Sep 92 18:10:39 GMT
Organization: CS Dept., Memorial University of Newfoundland


 A while back someone posted a message referring to an incredible cloudless
earth image that's available by ftp. I can't find the original article, 
so could the original poster please email me the ftp address.
 
 Thanks in advance.

Colin Stuckless
colins@garfield.cs.mun.ca
Newsgroups: comp.graphics
From: taudas@ais.org (Tony Audas)
Subject: Re: Plants & Fractals: Pfg, Spiral, Ise, Mapl, Panel etc.
Keywords: Labaratory programs listed in _The Algorithmic Beauty of Plants_
Organization: UMCC
Distribution: comp
Date: Wed, 7 Oct 1992 01:56:14 GMT

the program fractint (msdos)/Xfractint (X) implements some of those.
source is available.  i guess ftp.fumet.fi would be the first place to try,
i think it is on wuarchive.wustl.edu.

Xref: sparky comp.graphics:10080 comp.programming:2731 comp.os.msdos.programmer:9632 rec.games.programmer:3976 alt.msdos.programmer:2459 alt.sources.d:1165
Newsgroups: comp.graphics,comp.programming,comp.os.msdos.programmer,rec.games.programmer,alt.msdos.programmer,alt.sources.d
Subject: Re: Primitive source code or algorithms
From: dave@cs.arizona.edu (Dave Schaumann)
Date: 28 Sep 92 16:42:36 GMT
Reply-To: dave@cs.arizona.edu (Dave Schaumann)
Followup-To: comp.graphics
Organization: University of Arizona

In article <2AC6BE90.24567@ics.uci.edu>, dbassett@bonnie (Douglas Scott Bassett) writes:
>Does anyone know of a good reference for C or ASM SOURCE code or
>general algorithms for primitive graphic elements (i.e. lines,
>ellipses, arcs, polygons, regions, etc.)

_Computer Graphics: Principles and Practice_ by Foley, et al
(ISBN 0-201-12110-7) has all the algorithms you'll ever need.


>The biggest problem I'm having is implementing
>regions, especially clipping regions.

There's lots of stuff on clipping.

-- 
What signature?
Newsgroups: comp.graphics
From: jpl@grafikus.fct.unl.pt (Joao Prospero Luis [ps])
Subject: Re: TIFF FORMAT needed ...
Organization: Universidade Nova de Lisboa, PORTUGAL
X-Newsreader: TIN [version 1.1 PL6]
Date: Fri, 25 Sep 1992 16:53:09 GMT

Mark Olfert (mark@audiolab.UWaterloo.ca) wrote:
>I was directed to the "newsgroups" by one of the computer consultants
>when I queried him on TIFF file format.
>
>All I need to know about is standard uncompressed TIFF format.
>Can anybody give me a reference to an article in PC magazine or a
>tiff manual etc??  (or an appropriate group to post to:-)

	You can find the TIFF 6.0 specification in TIFF6.ps.Z at
zamenhof.cs.rice.edu in directory pub/graphics.formats. If you just
need software to work with TIFF read the FAQ where is stated how to
get free software to manipulate various graphicformats.

	Hope that helps,

		JPL
--
Joao Prospero Luis                | BITNET/Internet: jpl@fct.unl.pt
Universidade Nova de Lisboa       |            UUCP: jpl@unl.uucp
FCT - Dpto. de Informatica        | Fax:   (+351) (1) 295-5641
2825 Monte Caparica, PORTUGAL     | Phone: (+351) (1) 295-4464
From: gillies@m.cs.uiuc.edu (Don Gillies)
Newsgroups: comp.graphics
Subject: Re: Primitive source code or algorithms
Date: 30 Sep 92 18:49:45 GMT
Article-I.D.: m.1992Sep30.184945.3764
Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL

Rumor has it that on the macintosh, a general (non-rectangular)
"Region" is a set of rectangular regions on the screen combined with
boolean operators.  I am not sure about all the details, but I think
apple applied for a patent on the implementation of regions.  Can
anyone elaborate?

- Don
--
Newsgroups: comp.graphics
Subject: 24-bit Truecolour (cheap) is here!
From: djlewis@ualr.edu
Date: 2 Oct 92 12:00:26 GMT
Organization: University of Arkansas at Little Rock

Has anyone tried this new video card?
specs:
Hi_colour compatible,
640x480x32k colours
800x600x32k colours 

Ext Hi_colour,
640x480x64k colours
800x600x65k colours

Truecolor 24bit,
320x200x16.7million colours
640x480x16.7million colours

VESA compliance built into bios rom and full VGA compatible

SVGA,
640x480x256 colours
800x600x256 colours
1024x768x256 colours
1280x1024x16 colours

My experiance with this card is that it is manufactured by CIRRUS 
Technologies. It uses the CIRRUS GD564? controller. . . Chip number is from
memory, might be incorrect. The board is distributed by STB Inc of Richardson
Texas. I got it through the local BEST BUYs store for a mere $129.00 in the
1-meg version ( comes as 512k with lessor video options or the full blown
1-meg). 
	It looks GREAT.	I compare this remark to actual use of a AT&T
Truevision TARGA24 board, so I now what 24million means. Running this board
on a DTK 386/387/33 the performance is very good. It comes with WIN3.1, 
Autodesk, OS/2, GemWorks and many other drivers. Windows 3.1 performs well
in all the modes.

Question: I want to write 'C' (Borlandc) programs for this card. Any other
experiance with this card would be appreaciated.

Don Lewis
djlewis@spider.edu

Newsgroups: comp.graphics,sci.image.processing
From: julien@scs.leeds.ac.uk (J C Flack)
Subject: Re: Image Skeletonizing/Thinning Algorithms
Originator: julien@csparc2
Organization: The University of Leeds, School of Computer Studies
Date: Tue, 6 Oct 1992 10:42:41 GMT

In article <1992Sep23.015851.23568@sierra.com> chas@sierra.com (Charles Boyd) writes:
>
>Where can I find some information (pointers, code etc) about skeletonizing?
>

This may be of interest:
[Taken from comp.infosystems.gis]

================================================================

 >From:         Duane F Marble <dmarble@MAGNUS.ACS.OHIO-STATE.EDU>
 >Subject:      Line Thinning Methodologies
 >
 >The current issue of IEEE TRANSACTIONS ON PATTERN ANALYSIS AND
 >MACHINE INTELLIGENCE, Vol. 14, No. 9, Sept. 1992, contains a
 >useful article by Louisa Lam, Seong-Whan Lee, and Ching Y. Suen
 >entitled:
 >     "Thinning Methodologies -- A Comprehensive Survey"
 >It occupies pages 869-885 and lists 138 citations.
 >As usual, little of the cartographic literature (e.g., Peuquet's
 >two part article in CARTOGRAPHIA) is included.
 >
 >--
 >Duane F. Marble            E-mail: dmarble@magnus.acs.ohio-state.edu
 >Dept. of Geography
 >The Ohio State University  Telephone:  (614) 292-2250

================================================================

Julien Flack.
julien@scs.leeds.ac.uk



Newsgroups: comp.graphics
From: dpape@mrcnext.cso.uiuc.edu (Daniel Pape)
Subject: satellite pics
X-Newsreader: Tin 1.1 PL5
Organization: CSO Resource Center
Date: Sat, 26 Sep 1992 23:57:17 GMT

Anyone know where i can get satellite pics of the earth (or other planets)???

How about any topological data files?

Dan Pape

Newsgroups: comp.graphics
From: davidh@towers.rn.com (David Holland)
Subject: Re: X-rated GIFs
Organization: Small System Specialists
Date: Sun, 27 Sep 92 15:14:55 GMT

foo@netcom.com (Mark Hall) writes:

>In article <herman.717468442@phage> herman@nosc.mil (John W. Herman) writes:
>)I don't know about Europe, Asia, etc. but putting X-rated pictures on aa
>)net connected to NSF Net gets your site disconnected. 

>   Abandoning the thread of whether this is a good thing, and who saved
>what in WWII, is the above true? Sounds like  >ahem< 
>something you know, but which isn't true. Is there any case where a 
>site has been disconected for this reason? Examples, anyone? 

>   Call me sceptical, but please back it up. From the amount of traffic
>(I've yet to visit a site where pictures didn't exist) I would expect 
>there to be no net.  Some clever souls were downloading pictures to 
>my former school because there were anonymous-writable directories in 
>the ftp tree. As of a short while ago, the site was still connected. 
>The last time I got a new newsreader and had to choose what groups I read,
>there were groups with names including the string "erotica". Have those 
>disappeared? 


I don't know of any that have been shut down exactly, however
wuarchive.wustl.edu USED to carry R/X rated pictures however they
went away a long time ago, and in the directory where the pictures were 
there was a message to the effect that Someone found the pics and complained
so wustl decided it was better to pull the pics than come under investigation.
The reasoning being that the internet is for "EDUCATIONAL" purposes, and 
the pictures were of a somewhat questionable educational value. 

The reason your former schooll is still going, is because they've not gotten
caught. (ie only a few people know/knew the exact address, so there wasn't
much traffic being generated)

As for the erotica groups... I THINK they're different. I've heard its
because they're not in directly machine readable form (ie uuencoded), 
but I could be mistaken.

Thats my undestanding of the matter.

David Holland
davidh@towers.rn.com
From: spl@pitstop.ucsd.edu (Steve Lamont)
Newsgroups: comp.graphics
Subject: Re: Wang OPEN/image document imaging for AIX starts shipments
Date: 2 Oct 92 21:18:18 GMT
Article-I.D.: network.1aieaqINN3kt
Organization: University of Calif., San Diego/Microscopy and Imaging Resource
NNTP-Posting-Host: pitstop.ucsd.edu

In article <199210021947.AA27522@tuna.wang.com> IMAGING.CLUB@OFFICE.WANG.COM ("Imaging Club") writes:
>The Wang Integrated Imaging System (recently ranked as the number one
>document imaging system by Computerworld) has been ported to AIX, ...

I thought Wang went belly up recently.

							spl
-- 
Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@szechuan.ucsd.edu
UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
"If you don't think people are this crazy, you need to move to LA!"
                                     - Gary Stollman
Newsgroups: comp.graphics
From: kca@engin.umich.edu (Jonathan Van Oast)
Subject: multiple gif images in one .gif file ???
Date: Thu, 01 Oct 92 10:09:04 EDT
Organization: University of Michigan Engineering, Ann Arbor

i am working on a project where peoples pictures are scanned and stored
on our network.  rather than keep one file per person, i seem to think
(am i right?) that you can store multiple images in one .gif file.  this
way i could just keep a couple files (like group1.gif, group2.gif) which
would each have several pictures in them.  is there such a standard for
gif?  and, if so...

1) is there a utility available to convert single gif files into one
   multiple-gif file?
2) is there a public-domain/freeware DOS viewer for multiple gif files?
3) "              "                  MAC          "                   ?

ANY help would be great.  post here or email (kca@engin.umich.edu).
THANKS!
From: dave.mikelson@almac.co.uk
Newsgroups: comp.graphics
Subject: looking for dxfin sou
Date: 26 Sep 92 21:30:11 GMT
Distribution: comp
Organization: ALMAC BBS Ltd

JY>I amd looking for a program to read DXF file produced by AUTOCAD
JY>The program should extract, at least, polygons, polylines and text
JY>from such a file. Any pointers are welcome.

Heres a long shot: Try to get the file DXF2DKB.ZIP.  It coverts ACAD
DXF to David K. Buck Raytracer input files.  It will however only
convert polygons to triangles.  The DKB input file will be an ASCII
file, and it is fairly easy to figure out the format by inspection.

I would only try this if you are really stuck.  BTW, I think it will
do lines, but I think it does this by converting them to 
near-degenerate triangles.

Good luck, 

I am also interested in trying to do this, so if you find out anything,
could you let me know?

Thanks, Dave
---
 ~ DeLuxe}/386 1.12 #8993 ~ 
--
ALMAC BBS Ltd. 0324-665371
Dos based USENET access,  call for details!
From: harlan@Physik.TU-Muenchen.DE (Magnus Harlander)
Newsgroups: comp.graphics
Subject: Re: 3D Parametric Plot Program or Library wanted
Keywords: 3D Parametric Plot Program or Library
Date: 29 Sep 92 21:16:03 GMT
Organization: Leibniz-Rechenzentrum, Muenchen (Germany)

harlan@Physik.TU-Muenchen.DE (Magnus Harlander) writes:

>Hi,

>I'm looking for a program or a library that can produce 3D parametric plots 
>x(t) y(t) z(t) for X11 and postscript.
>Any ideas where to look and what for?

>\Magnus

I got some responses via mail all directing me to gnuplot. I've checked
that already out and many other things. Gnuplot does not do the job.
It only does n-1 dimensional hyperspheres. I need a n-2 dimensional
one. x(t), y(t), z(t) that are lines in 3D.

\Magnus
--
Magnus V. Harlander                   harlan@physik.tu-muenchen.de   
GeNUA mbH and Physics Dep. TUM         Tel: +49 (89) 714 3083
D-8000 Munich                               +49 (89) 3209-2192
         -----> Happy hacking with OPERATOR Beer. <-----
Newsgroups: comp.graphics
From: "vivek gupta" <vigupta@landshark.cs.indiana.edu>
Subject: Re: Wang OPEN/image document imaging for AIX starts shipments
Organization: Indiana University, Bloomington
Date: Fri, 2 Oct 1992 16:29:24 -0500

In article <199210021947.AA27522@tuna.wang.com> IMAGING.CLUB@OFFICE.WANG.COM ("Imaging Club") writes:
>The Wang Integrated Imaging System (recently ranked as the number one
>document imaging system by Computerworld) has been ported to AIX, with
>equivalent or better functionality, and named OPEN/image for AIX.
>Customer shipments began in September.
     
etc...

Should these sort of "Ads" really be posted here, I really read this for ideas and other peoples views on hardware, to get away from the Ads, and get honest opinions (all though some are obviously opinionated towards their own favorite brand).  

Vivek

Xref: sparky comp.graphics:10279 comp.graphics.visualization:1447
From: dvj@lab2.phys.lgu.spb.su (Vladimir J. Dmitriev)
Newsgroups: comp.graphics,comp.graphics.visualization
Subject: X-ray visualization of 3d function
Keywords: visualization
Date: 5 Oct 92 15:40:01 GMT
Reply-To: dvj@lab2.phys.lgu.spb.su
Organization: University of St-Petersburg, 2-nd Physics Laboratory.

To recognize space structure of 3d function it is convenient to  draw
graph like X-ray photo (intensity of each pixel depends up on total density
integral along ray from light source to observer).
Nice example FILM.GIF is available on alt.binaries.pictures.
This image shows extra fine 3d film and was built by  epiGRAF package
for scientific graphics  and visualization on PC-s.
Format GIF87a     640x480 16 colors.
--
--
Newsgroups: comp.graphics.gnuplot
From: ejk@ux2.cso.uiuc.edu (Ed Kubaitis - CCSO)
Subject: Re: Problems: X11 and HP console
Organization: University of Illinois - Urbana
Date: Mon, 5 Oct 1992 11:14:08 GMT

wonga@steam.chem.su.oz.au (Adrian Wong) writes:
  |I cannot get gnuplot to use the multi-colour X11 terminal/window on 
  |our HP 750 console (it works fine on other X terminals). The message
  |I get is "cannot allocate .... switching to monochrome".
  |
  |Have any other HP users seen this? Solutions, anyone?

This problem has been seen on HP systems when a hexadecicmal RGB color  
is used for '*background'. Try using an ordinary named color, at least
for 'gnuplot*background'. Attached is some correspondence from 
bug-gnuplot regarding the problem. In theory RGB color notation ought
to work. I'll check it out for 3.3.

Ed
----------------------------------
Ed Kubaitis (ejk@ux2.cso.uiuc.edu)
Computing & Communications Services Office - University of Illinois, Urbana

==============================================================================
Date: Mon, 3 Aug 92 15:36:33 +0200
From: Laurent Demailly <dl@hplyot.obspm.circe.fr>
To: Ed Kubaitis - CCSO <ejk@ux2.cso.uiuc.edu>
Subject: Re: Problem on HP9000/720 HP-UX 8.07 with Vuewm

 >   |Terminal type set to 'x11'
 >   |gnuplot> plot sin(x)
 >   |gnuplot>
 >   |gnuplot: can't allocate .background:#6C006C006C00
 >   |gnuplot: reverting to monochrome
 >   |-----------------------------------------------------------
 >   |The previous release (3.1) worked fine...
 >   |It seems to be a problem linked with vuewm, or vuelogin (hp look)
 >   |since it works in 'fail safe session' with mwm !
 >   |
 >   |What can I do ? (appart from reverting to 3.1)
 > 
 > Hi, 
 > 
 > This problem has been seen on other HP machines with VUE. It looks
 > like VUE is setting background resources that the standard Xlib color 
 > handling routines used by gnuplot_x11 can't handle.  Have you tried 
 > requesting a specific background color for gnuplot in your .Xdefaults
 > (assuming VUE honors those)? Something like:
 > 
 > 	 gnuplot*background: white
 > 
 > ----------------------------------
 > Ed Kubaitis (ejk@ux2.cso.uiuc.edu)
 > Computing & Communications Services Office - University of Illinois, Urbana

Thanks, a lot , from your hint I found the solution : It came from the
fact that I specified '*background: #6C006C006C00' in my
vue.ressources (Vue equiv of .Xdefaults) : an hexadecimal
format not supported in gnuplot's call by name color assignement, I've
replaced it with 'grey40' and now It works fine...
May be this could help other people...

	Thanks again
        Laurent Demailly
From: ecm9093@aston.ac.uk (J.P.FLETCHER)
Newsgroups: comp.graphics.gnuplot
Subject: Re: Hidden3d and countours
Date: 5 Oct 92 09:11:56 GMT
Organization: Aston University

In article <1992Oct2.041133.10098@nwnexus.WA.COM> gregory@halcyon.com (Gregory Wright) writes:

> when plotting surface plots I have need to have the countour lines
>appear on both the surface and grid sections of the plot. I set it
>with:
>      set countour both
>and this works until I get rid of the hidden surfaces with:
>      set hidden3d.

>When I do that the countour lines vanish form the surface itself and
>are left only on the x-y plane.

>Any hints?
>greg
I don't have the answer to this one.  I looked at the code and concluded 
that the contours were regarded as hidden by the surface they were in, from 
both above and below.  Odd scraps of the contours could be seen at the edges.
I think it would need some major work on the 3d routines to sort it out.

John

--------------------------------------------------------------
Dr John P. Fletcher       
Department of Chemical Engineering and Applied Chemistry,
Aston University,         Tel: (44) 21 359 3611 ext 4625
Aston Triangle,		  Email(Janet): J.P.FLETCHER@UK.AC.ASTON
BIRMINGHAM B4 7ET   U.K.  Email(Other): J.P.FLETCHER@ASTON.AC.UK
--------------------------------------------------------------
Newsgroups: comp.graphics.gnuplot
From: nholtz@zonker.cascade.carleton.ca (Neal Holtz)
Subject: FYI: Editing gnuplot output with tgif
Organization: none
Date: Fri, 2 Oct 1992 13:24:02 GMT

We regularly use tgif to edit the graphs produced by gnuplot
(lets us add little fugures, better legends, etc.).  We have
developed a tgif driver that outputs a ".obj" file suitable
for input to tgif.  I have submitted this to the maintainers
at about version 3.1, but it didn't seem to make it into 3.2.

If there is enough interest, I could post it, or something.
--
Prof. Neal Holtz,  Dept. of Civil Eng.,  Carleton University,  Ottawa,  Canada
Internet: nholtz@civeng.carleton.ca  Ph: (613)788-2600x5797 Fax: (613)788-3951
Newsgroups: comp.graphics.gnuplot
From: anderson@cshl.org (John Anderson)
Subject: symmetric polar plots
Organization: Cold Spring Harbor Laboratory
Date: Tue, 6 Oct 1992 17:52:00 GMT

Is there any way to plot symmetric polar plots, with the scale on
horizontal and vertical axes the same?  Is there any way to make a
circular border on polar plots?

Thanks



-- 
-------
John E. Anderson
W. M. Keck Structural Biology Laboratory
Cold Spring Harbor Laboratory
Newsgroups: comp.graphics.gnuplot