From help-octave-request at bevo dot che dot wisc dot edu Tue Dec 21 20:33:31 1999 Subject: Image read/write for octave From: A+A Adler To: help-octave at bevo dot che dot wisc dot edu cc: help-octave Date: Tue, 21 Dec 1999 21:48:36 -0500 (EST) Recently, there have been several posts asking about reading/writing images from octave. Numerous solutions have been proposed, the simplest involve reading from a pipe from a program which converts the image to a p?m format and parsing this format with fread / fscanf commands. Unfortunately, this is slow, UNIX specific, and depends on the existence of the converter programs. I think we need to incorporate image reading/writing into octave. This should be *.oct files. I have written some *.oct file links to the IJG jpeg library code (ftp://ftp.uu.net/graphics/jpeg) (For your information, this code provides access to jpeg, bmp, p?m and write for *un*gif (ie. non-unisys patent offending gif files) ) I'd like to recommend incorporating this code but I'm wondering if the license is GPL compatible. (I'll post it to octave-sources anyway (once I've cleaned it up a little), but I really think this would be a very useful feature for octave) Here is the IJG JPEG licence: ______________________________________________________________ LEGAL ISSUES ============ In plain English: 1. We don't promise that this software works. (But if you find any bugs, please let us know!) 2. You can use this software for whatever you want. You don't have to pay us. 3. You may not pretend that you wrote this software. If you use it in a program, you must acknowledge somewhere in your documentation that you've used the IJG code. In legalese: The authors make NO WARRANTY or representation, either express or implied, with respect to this software, its quality, accuracy, merchantability, or fitness for a particular purpose. This software is provided "AS IS", and you, its user, assume the entire risk as to its quality and accuracy. This software is copyright (C) 1991-1998, Thomas G. Lane. All Rights Reserved except as specified below. Permission is hereby granted to use, copy, modify, and distribute this software (or portions thereof) for any purpose, without fee, subject to these conditions: (1) If any part of the source code for this software is distributed, then this README file must be included, with this copyright and no-warranty notice unaltered; and any additions, deletions, or changes to the original files must be clearly indicated in accompanying documentation. (2) If only executable code is distributed, then the accompanying documentation must state that "this software is based in part on the work of the Independent JPEG Group". (3) Permission for use of this software is granted only if the user accepts full responsibility for any undesirable consequences; the authors accept NO LIABILITY for damages of any kind. These conditions apply to any software derived from or based on the IJG code, not just to the unmodified library. If you use our work, you ought to acknowledge us. Permission is NOT granted for the use of any IJG author's name or company name in advertising or publicity relating to this software or products derived from it. This software may be referred to only as "the Independent JPEG Group's software". We specifically permit and encourage the use of this software as the basis of commercial products, provided that all warranty or liability claims are assumed by the product vendor. ______________________________________________________________ Andy Adler, adler at mondenet dot com ----------------------------------------------------------------------- Octave is freely available under the terms of the GNU GPL. Octave's home on the web: http://www.che.wisc.edu/octave/octave.html How to fund new projects: http://www.che.wisc.edu/octave/funding.html Subscription information: http://www.che.wisc.edu/octave/archive.html -----------------------------------------------------------------------