From feck@informatik.uni-kl.de Mon Jul 4 10:35:42 1994 Newsgroups: alt.graphics.pixutils Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!concert!news.duke.edu!convex!cs.utexas.edu!howland.reston.ans.net!xlink.net!rz.uni-karlsruhe.de!stepsun.uni-kl.de!uklirb.informatik.uni-kl.de!feck From: feck@informatik.uni-kl.de (Christoph Feck IRZ) Subject: Re: TIFF specification... Message-ID: <1994Jun30.143725@informatik.uni-kl.de> Sender: news@uklirb.informatik.uni-kl.de (Unix-News-System) Nntp-Posting-Host: uklira.informatik.uni-kl.de Organization: University of Kaiserslautern, Germany References: <2urc86$rcf@cri.ens-lyon.fr> Date: Thu, 30 Jun 1994 12:37:25 GMT Lines: 8 ffeschet@ens-lyon.fr (Fabien Feschet) wrote: > Tag Image File Format Rev 4.0 > April 31, 1987 Ouch! This is old. Rev 6.0 is the current. You can find it at ftp.sgi.com:/graphics/tiff/TIFF6.ps.Z (P*stScript file). Christoph From n84261@pbhrzx.uni-paderborn.de Thu Jul 14 23:53:11 1994 Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!concert!rutgers!spcuna!solaris.cc.vt.edu!news.duke.edu!news-feed-1.peachnet.edu!emory!swrinde!sdd.hp.com!nigel.msen.com!zib-berlin.de!uni-paderborn.de!pbhrzx.uni-paderborn.de!n84261 From: n84261@pbhrzx.uni-paderborn.de () Newsgroups: alt.graphics.pixutils Subject: Re: format of raw file created from 'pnmtoraw' Date: 12 Jul 94 19:33:30 GMT Organization: Universitaet Paderborn, Germany Lines: 48 Message-ID: References: <2vk8tf$179@hobbes.cc.uga.edu> NNTP-Posting-Host: pbhrzx.uni-paderborn.de Keywords: format dennis@fantasia.bae.griffin.peachnet.edu (Dennis Graham 'InterNaut') writes: > Can anybody give a brief explanation of the format of the >raw file produced by 'pnmtoraw'? I tried to read the raw file in and ^^^^^^^^^^ I guess you mean the "rawtopgm", because I don't have "pnmtoraw" but "pnmnoraw" which does a conversion of P1 -> P4 (pbm) P2 -> P5 (pgm) P3 -> P6 (ppm) >rotate it, but apparently, I am confused about the format. > In the header info, I see the following: > P5 > x_width y_height > grey_scale_range > Now, I just assumed that I could read the width and height >and that the data is simply formatted as a stream from the upper-left >corner to the bottom-right corner. Am I incorrect in this assumption? I guess so too. I have just tried the "rawtopgm" with a text file; rawtopgm 256 256 mpeg.faq > raw.pgm And you get an output only a pgm-header more than the original file and the rest is discarded. Using "pgmhist" one can even examine the relative frequency of alphabet in English texts. I saw a large peak at "space"(32) and an "English-Distribuion" on the right side of MPEG.FAQ. Displaying the output in this case is something like cat mpeg.faq > /dev/audio I don't know when do we need to use "rawtopgm" and "rawtoppm"? -- |------------------------------------------------------------------------| Nan-shan Chen Vogeliusweg 19.4.0.3, 33100 Paderborn getchen@get.uni-paderborn.de n84261@pbhrzx.uni-paderborn.de private: root@slim.ms.sub.org 51 43 1.72 N / 08 45 49.29 E |------------------------------------------------------------------------| From degrande@lifl.fr Tue Jul 19 14:58:39 1994 Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!concert!inxs.concert.net!taco.cc.ncsu.edu!lll-winken.llnl.gov!sundance.llnl.gov!fastrac.llnl.gov!s1.gov!overload.lbl.gov!agate!spool.mu.edu!howland.reston.ans.net!xlink.net!scsing.switch.ch!swidir.switch.ch!univ-lyon1.fr!jussieu.fr!univ-lille1.fr!gambrinus!degrande From: degrande@lifl.fr (Degrande_Samuel) Newsgroups: alt.graphics.pixutils Subject: Re: What format is this file? Date: 18 Jul 1994 19:09:16 GMT Organization: Laboratoire d'Informatique Fondamentale de Lille Lines: 21 Distribution: world Message-ID: <30ek0s$qko@netserver.univ-lille1.fr> References: <2vvl2r$3cv@panix.com> Reply-To: degrande@lifl.fr NNTP-Posting-Host: gambrinus.lifl.fr The .iob files I know use the TDDD graphics format. They are 3D databases. You can find more informations and even converters on, by exemple, ftp://wuarchive.wustl.edu/graphics/graphics/objects/TDDD (Address found in the Computer Graphics Ressource Listing) Hope it helps --- _____________________________________________________________________________ _ / ) Samuel Degrande LIFL - URA 369 CNRS - Bat M3 \/ Phone: (33)20.43.47.20 USTL - Universite de Lille 1 /\ _ _ _ Fax: (33)20.43.65.66 59655 VILLENEUVE D'ASCQ CEDEX _/(_)_(_|_( ) )_ E-mail: degrande@lifl.fr FRANCE "For a moment, nothing happened. Then, after a second or so, nothing continued to happen." D.Adams _____________________________________________________________________________ From dyson@sunfish.physics.uiowa.edu Tue Jul 19 21:26:22 1994 Newsgroups: alt.graphics.pixutils Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!caen!zip.eecs.umich.edu!newsxfer.itd.umich.edu!europa.eng.gtefsd.com!howland.reston.ans.net!vixen.cso.uiuc.edu!newsfeed.ksu.ksu.edu!moe.ksu.ksu.edu!hobbes.physics.uiowa.edu!dyson From: dyson@sunfish.physics.uiowa.edu (Richard L. Dyson) Subject: Re: PBMPLUS Message-ID: Sender: news@space.physics.uiowa.edu Nntp-Posting-Host: sunfish.physics.uiowa.edu Reply-To: dyson@sunfish.Physics.UIowa.EDU Organization: Department of Physics & Astronomy References: <3043to$n2r@www.interramp.com> <30dimo$gsp@netnews.ntu.edu.tw> Date: Tue, 19 Jul 1994 14:01:11 GMT Lines: 49 > : I'm trying to find the ftp server where I can obtain a package called PBMPLUS. > : Anybody out there have any idea? N E T P B M Release 1 March 1994 Netpbm is a toolkit for conversion of images between a variety of different formats, as well as to allow a few basic image operations. The package is intended to be portable to many platforms. It has been tested under UNIX (BSD and SYSV, e.g. SGI, Sun4, Sun386i, DEC and Apollo DN 3500), VMS and AmigaDOS. There are also compiler directives in it for MS-DOS. You'll find the latest release of Netpbm at the following sites: * wuarchive.wustl.edu (128.252.135.4), directory /graphics/graphics/packages/NetPBM * ikaros.fysik4.kth.se (130.237.35.2), directory /pub/netpbm. * ftp.informatik.uni-oldenburg.de (134.106.1.9). This site also carries binaries for the Amiga. * peipa.essex.ac.uk (155.245.115.161), directory ipa/src/manip * ftp.rahul.net (192.160.13.1), directory /pub/davidsen/source * ftp.cs.ubc.ca, directory /ftp/archive/netpbm * ftp.x.org, directory /contrib You'll also find a mirror site at the BBS: * sixhub.tmr.com in the "source" area. Netpbm is based on the widely spread Pbmplus package (release: 10 Dec 91). On top of that, a lot of improvements and additions have been made. After the latest release of Pbmplus, a lot of additional filters have been circulating on the net. The aim of Netpbm was, to collect these and to turn them into a package. This work has been performed by a group of program- mers all over the world. If *you* have some code to add, please contact us, and we will incorporate it. There is a mailing list for discussions about Netpbm. You post a message to the list by writing to "netpbm@fysik4.kth.se". If you want to be on the list, please contact the list administrator, "oliver@fysik4.kth.se". Please note, that this is not an official Pbmplus release. The code in this release is merely a collection of code from various sources around the world. Not all of the new code parts follow the high standard of programming of Pbmplus. We have tried to make the code portable to as many systems as possible, but we haven't cleaned up all routines. We hope that this release will help the many users of Pbmplus to upgrade their code all in one piece, instead of having to hunt down different code fragments at different sites around the world. We also hope, that our effort will help the author of Pbmplus, Jef Poskanzer, to make a new official release soon. From ahn@wfu.edu Thu Jul 21 09:12:44 1994 Xref: saips.cv.nrao.edu sci.image.processing:8647 alt.image.medical:1200 alt.graphics.pixutils:6611 Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!concert!news.wfu.edu!ahn From: ahn@wfu.edu (Dave Ahn) Newsgroups: sci.image.processing,alt.image.medical,alt.graphics.pixutils Subject: Re: 12 bit gray file formats Date: 20 Jul 1994 21:00:05 GMT Organization: Wake Forest University Lines: 35 Message-ID: <30k38l$js5@eis.wfunet.wfu.edu> References: NNTP-Posting-Host: ac.wfunet.wfu.edu X-Newsreader: NN version 6.5.0 #6 (NOV) xrs@netcom.com (X-Ray Scanner Corporation) writes: >I'm looking for file formats capable of storing 12 bit >grayscale images. The ideal format would already have some >tools (commercial or public domain) capable of dealing with it. >I've already looked at the ACR/NEMA DICOM 3.0 draft (chapter 10, >Media Storage and File Format). It would be fine, except I can't >find any PC or Mac tools which read DICOM. >Any info would be appreciated. >Thanks in advance. We have 12 bit grayscale CT images and ran into the problem of storing them efficiently (i.e. not convert them to 16 bit and waste 4 bits). We couldn't find a solution that was portable enough between multiple platforms, so we're simply using an in-house file format. We've modified some of our graphics programs and apps to automagically detect this image type. In order to use the images outside of our programs, we'd have to store them in 16bit grayscale image or volume files. If loss of data is acceptable to you, you may want to consider cutting out 4 bits by applying a colormap reduction algorithm that will reduce the 12bits to 8bits. This works remarkably well for us with little loss of significant data and is portable to nearly any platform. Dave. >-- >---------------------------------------------------------------------- >X-Ray Scanner Corporation xrs@netcom.com -- Dave Ahn Internet: ahn@hbar.phy.wfu.edu, ahn@wfu.edu #include "When you were born you cried, and the world rejoiced. Try to live your life so that when you die you will rejoice, and the world will cry." -1/2 jj^2 From ahn@wfu.edu Thu Jul 21 09:14:19 1994 Xref: saips.cv.nrao.edu sci.image.processing:8647 alt.image.medical:1200 alt.graphics.pixutils:6611 Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!concert!news.wfu.edu!ahn From: ahn@wfu.edu (Dave Ahn) Newsgroups: sci.image.processing,alt.image.medical,alt.graphics.pixutils Subject: Re: 12 bit gray file formats Date: 20 Jul 1994 21:00:05 GMT Organization: Wake Forest University Lines: 35 Message-ID: <30k38l$js5@eis.wfunet.wfu.edu> References: NNTP-Posting-Host: ac.wfunet.wfu.edu X-Newsreader: NN version 6.5.0 #6 (NOV) xrs@netcom.com (X-Ray Scanner Corporation) writes: >I'm looking for file formats capable of storing 12 bit >grayscale images. The ideal format would already have some >tools (commercial or public domain) capable of dealing with it. >I've already looked at the ACR/NEMA DICOM 3.0 draft (chapter 10, >Media Storage and File Format). It would be fine, except I can't >find any PC or Mac tools which read DICOM. >Any info would be appreciated. >Thanks in advance. We have 12 bit grayscale CT images and ran into the problem of storing them efficiently (i.e. not convert them to 16 bit and waste 4 bits). We couldn't find a solution that was portable enough between multiple platforms, so we're simply using an in-house file format. We've modified some of our graphics programs and apps to automagically detect this image type. In order to use the images outside of our programs, we'd have to store them in 16bit grayscale image or volume files. If loss of data is acceptable to you, you may want to consider cutting out 4 bits by applying a colormap reduction algorithm that will reduce the 12bits to 8bits. This works remarkably well for us with little loss of significant data and is portable to nearly any platform. Dave. >-- >---------------------------------------------------------------------- >X-Ray Scanner Corporation xrs@netcom.com -- Dave Ahn Internet: ahn@hbar.phy.wfu.edu, ahn@wfu.edu #include "When you were born you cried, and the world rejoiced. Try to live your life so that when you die you will rejoice, and the world will cry." -1/2 jj^2 From iwj@cam-orl.co.uk Mon Jul 25 17:54:15 1994 Xref: saips.cv.nrao.edu alt.graphics.pixutils:6624 alt.sources.d:3284 Path: saips.cv.nrao.edu!hearst.acc.Virginia.EDU!caen!zip.eecs.umich.edu!panix!MathWorks.Com!news.duke.edu!convex!cs.utexas.edu!swrinde!pipex!lyra.csx.cam.ac.uk!iwj From: iwj@cam-orl.co.uk (Ian Jackson) Newsgroups: alt.graphics.pixutils,alt.sources.d Subject: Re: PATCH: netpbm/pbmplus 16 bit raw files Date: 25 Jul 1994 13:33:46 GMT Organization: Olivetti Research Ltd / C.U. Computer Laboratory Lines: 25 Message-ID: <310evq$nh6@lyra.csx.cam.ac.uk> References: <30p3rn$b4d@flash.ksapax> NNTP-Posting-Host: leek.cam-orl.co.uk Summary: little endian not portable In article <30p3rn$b4d@flash.ksapax>, David Clunie wrote: >Raw 16 bit read/write patch for pbmplus.10dec91 and netpbm-13oct93. > >[...] >I also had to define a byte order convention, so I chose little endian >arbitrarily. This is not selfish performance seeking as most of my machines >are big endian anyway ! Why did you choose it, if I may ask ? Almost all Unix systems have the htons/ntohs/htonl/ntohl byte-order conversion macros that mean that you don't have to write the tedious stuff yourself. Note that here `h' stands for `host' byte order and `n' for `network'. The standard byte order on the Internet for use in packet headers and so forth is big endian. PS: I have removed "Distribution: world" from the header. -- Ian Jackson iwj@cam-orl.co.uk Escoerea on IRC These opinions are my own. Cambridge University Computer Laboratory, New Museums Site. + 44 223 334676 Home: ijackson@nyx.cs.du.edu 2 Lexington Close, CB4 3LS. + 44 223 575512 PGP2 public key available. http://www.cl.cam.ac.uk/users/iwj10/