On 23 February 2010 15:43, David Grundberg <dav...@cs.umu.se> wrote:
>
> I don't know if the underlaying tiff library supports reading single frames.
>
> One way to work-around any frame loading problem is to make sure that all
> frames are loaded at once in one imread call. Maybe imread should read all
> frames available if there is only one argument. Maybe imread should be made
> to accept ":" as a frame index and load all available frames only then.
>
> David
>
David
I think that would be great. Would save, at least for me, loads of
time. From what I see in other labs with matlab, the default is always
to have a separate function that checks the number of frames and then
loads all of them in a for loop. I've also seen to use the info from
imfinfo given as an argument to imread which is supposed to speed up
imread. I I don't know how worried the development is when it comes to
keep compatibility with matlab. I, for one, would like to load all
frames with only one imread. To have a range of frames as an optional
argument would also be very handy.
While that is not implemented, I'll share my workaround in case
someone has the same problem. Basically I just save each frame as a
separate tif file (ImageJ added this option recently, no need for a
plug-in in File>Save as>Image sequence), and load each of them in
octave
file_path = regexprep(file_path, "0000", "");
for iImg = 1:nFrames
mod = sprintf("%0.4d", iImg-1);
mod_file_path = regexprep(file_path, ".tif$", [mod, ".tif"]);
imStack(iImg).data = imread(mod_file_path);
endfor
It's not the most general thing but can be changed easily and reduces
time of analysis from almost 4 hours to less than 3min :)
Carnë
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
_______________________________________________
Octave-dev mailing list
Octave-dev@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/octave-dev
