I want to mention that there’s always more than one way to do something, and it may be easier for you to use the convert command from the ImageMagick toolbox, by calling it with a system call in Matlab.

The setenv command in Matlab is very much available on the Windows platform.

I don’t understand that if it’s just a newer version of libtiff you’re trying to use, that you don’t use that library compiled for Windows(!) My guess is you will probably not be able to use libraries from a different OS. If you’re really trying to do this, it seems such a specific thing you’re trying to do that, again, I would recommend you contact Mathworks Tech Support if you can’t find help anywhere else on-line.

The command I provided above should work to put the path of the library your trying to use before Matlab’s libraries path (of course, your path won’t be /opt/local/lib/). You should also look into the loadlibrary command.

As of version 7.9 (aka R2009b), there is a new Tiff Class, which acts as a gateway to the LibTIFF libarary. I have that version, and just ran it and got this:

>> Tiff.getVersion()
ans =
LIBTIFF, Version 3.7.1
Copyright (c) 1988-1996 Sam Leffler
Copyright (c) 1991-1996 Silicon Graphics, Inc.

Version 3.7.1 came out in… *gulps* 2004!!

I tried to load a newer version (I’m on a Mac, so am using the latest from MacPorts) using the loadlibrary command, but ran into 64-bit problems. Hope this info helps you somewhat. If you get really stuck, I’d contact Mathworks support.

Does it have to be windows compiled libtiff or can I also use linux compiled libtiff, ie DLL or .so file ? Can someone PROFICIENT with this procedure test a version and post instructions that actually work as well as some debugging information ? If libtiff has dependencies, how to debug them or discover them from error messages ?

Thanks to the star who can help

Andy

OK, I had mistakenly left the soft link from this original post in place when I tested the above. Good news is I have figured it out!:

Once for your session you need to do this:

setenv('DYLD_LIBRARY_PATH',['/opt/local/lib/:' getenv('DYLD_LIBRARY_PATH')])


Then call convert (e.g.):

[s,w] = system(['/opt/local/bin/convert ',pwd,'/foo.png -rotate 90 ',pwd,'/foo2.png'])


TIFFs are, for better or for worse, a standard in many scientific disciplines, especially for microscopy and geographic data, so just swapping over to PNG is not an option. The TIFF format also has some unique features, like the way it handles metadata and multiple image frames per file.

Anyway, the code snip you sent me doesn’t solve the problem, I get the same error whether or not I change the path environment variable.

In both cases, the error (same as my above post) is:

dyld: Library not loaded: /opt/local/lib/libtiff.3.dylib

So I don’t think the path has anything to do with it.

1. Do NOT create (or undo) the softlink I describe above
2. Instead, set the environment path to the MacPorts library

Here’s a code snip:


setenv('PATH', ['/opt/local/lib/;' getenv('PATH') ]);
[s,w] = system(['/opt/local/bin/convert ',pwd,'/foo.png -rotate 90 ',pwd,'/foo2.png']);