Comments on: How many images can fit in a TIFF file?

By: Steve

Steve — Mon, 19 Oct 2009 19:48:43 +0000

Eran—Thanks. I corrected your syntax; you had <> instead of ~=.

By: Eran Mukamel

Eran Mukamel — Tue, 13 Oct 2009 21:53:02 +0000

Following up on Andrew Carter's suggestion, here is a function that returns the number of frames in a tiff stack:


function j = tiff_frames(fn)
%
% n = tiff_frames(filename)
%
% Returns the number of slices in a TIFF stack.
%
%

status = 1; j=0;
jstep = 10^3;
while status
    try
        j=j+jstep;
        imread(fn,j);
    catch
        if jstep<>1
            j=j-jstep;
            jstep = jstep/10;
        else
            j=j-1;
            status = 0;
        end
    end
end

By: Steve

Steve — Mon, 27 Jul 2009 13:51:06 +0000

Jurgen—Thanks for your input.

By: jurgen

jurgen — Wed, 22 Jul 2009 15:32:33 +0000

Hello Steve,
I read your post rather accidently while I was searching fro a method to read meta data from tif files but :
you wrote ” I’ve seen a tool that takes a directory full of single-image TIFF files and merges them quickly into a multipage TIFF file. Would something like that be helpful to you? ” I would be interested in the tool since we work with highspeed images of spreading processes, and then we could structure all images of one throw.

kind regard, and thanks fro the answer

By: Steve

Steve — Mon, 01 Jun 2009 14:44:18 +0000

Sathya—You’ve given no details about what kind of processing you are doing, so I can’t even begin to guess what the issue might be. I suggest that you use the MATLAB Profiler to analyze the performance of your code and see where the bottlenecks are.

By: Sathya

Sathya — Fri, 22 May 2009 21:06:54 +0000

Thanks for the reply.
I have an avi file with more than 10000 frames. I can write each frame as a single tif file(overwrite next time) and process image and find length of an object in the image. (I need to find length of object for all the 10000 frames and plot a graph using the result).But for the 100 frames itself, it takes much time. I tried for 250 frames too. Not dare enough to try 10000 frames. Is there anyway to do that in minimum time?

By: Steve

Steve — Mon, 27 Apr 2009 19:24:50 +0000

Sathya—Use imwrite with the ‘WriteMode’, ‘append’ option.

By: Sathya

Sathya — Mon, 27 Apr 2009 19:13:27 +0000

Hello,
I have an avi video, from which I can read every 50th frame. I want to save these frames as a single tif file. Is that possible? How can I do that?

By: Steve

Steve — Thu, 02 Apr 2009 17:25:36 +0000

Learner—Although the PGM format supports multiple images per file, the MATLAB functions imread and imwrite do not. I suggest that you consider using TIFF instead. Also, I can’t think of any particular reason for using the DFT in the process of storing multiple images.

By: Steve

Steve — Wed, 01 Apr 2009 11:29:35 +0000

Petr—Thanks for the information.