Comments on: MATLAB R2009a – imread and multipage TIFFs

By: Grant

Grant — Mon, 30 Jan 2012 20:01:21 +0000

Thanks- Don’t know how I missed that.. I think I searched for “can’t open file for writing,” the output from 2010a, while these posts refer to “couldn’t open file for writing.”

By: Steve Eddins

Steve Eddins — Mon, 30 Jan 2012 17:44:51 +0000

Grant—See my 09-Nov-2010 blog post and this tech support solution.

By: Grant

Grant — Mon, 30 Jan 2012 17:31:41 +0000

Hello again,

For quite some time I have been successfully using a code that invokes imwrite in a loop. The specific command is

imwrite(A,outfile,’tif’,'Compression’,'none’,'WriteMode’,'append’);

Suddenly I’m getting the following error in the middle of the writing process, seemingly at random (random file it crashes on, and in random spots in the stack):

??? Error using ==> imwrite at 453
Can’t open file “I:\Grant\PIFE\120129\rot_RT2_100nM_RT_5.tif ” for writing.
You may not have write permission.

Error in ==> tiffdir at 170
imwrite(A,outfile,’tif’,'Compression’,'none’,'WriteMode’,'append’);

Many times I can just restart the program and it will go without a hitch, however this is not desirable as I typically process large batches of large files overnight…

Any suggestions?

By: songci

songci — Thu, 03 Nov 2011 02:46:04 +0000

I have a problem when I read large Tif file. I use "imread" function, but it always say:"Out of Memory." I don't know how to solve this problem which had troubled me for a few days.

A=imread('I:\2005波段数据\AF-2005\MOD09A1AF.A2005001.sur_refl_b02.tif');

??? Error using ==> rtifc
Out of memory. Type HELP MEMORY for your options.

Error in ==> readtif at 52
[X, map, details] = rtifc(args);

Error in ==> imread at 430
    [X, map] = feval(fmt_s.read, filename, extraArgs{:});

By: saeed.khabazan

saeed.khabazan — Tue, 25 Oct 2011 14:34:39 +0000

Dear Seteve – at first I thank you for your help and responding to my reply. After that I agree whit you and I chose the first choice but unfortunately my image processing professor doesn’t understand this issue. This program is our first project and I’m really dissatisfied whit this project. Because instead of time I spend for this project I can do programming many of other useful image processing functions for image enhancement or etc.

By: Steve

Steve — Mon, 24 Oct 2011 19:43:27 +0000

Saeed—You could spend your time in graduate school studying remote sensing, or you could spend your time writing file format code that duplicates what is already available to you. If you choose to do the latter, the best I can do is to point you to the TIFF specification.

By: saeed.khabazan

saeed.khabazan — Mon, 24 Oct 2011 18:56:43 +0000

Hi. I’m a master student in remote sensing field and I have a problem. I want to read tif image from my computer but I want not to use “imread” command and I want to write this command myself. I mean that I want to read image from my computer without using this command. Can you help me ?

By: Steve

Steve — Wed, 21 Sep 2011 17:23:02 +0000

Andreas—The “.” refers to the current working folder (directory). Similarly, “..” refers to the parent folder. You’ll need to make sure that you filter out things returned by dir that are not the image files you are trying to read.

By: Andreas

Andreas — Mon, 19 Sep 2011 08:46:49 +0000

Steve is there a way to contact u via email to solve me some issues in coding?

By: Andreas

Andreas — Mon, 19 Sep 2011 08:29:18 +0000

any ideas? :P

info = imfinfo(nam(1).name)
Error using ==> imfinfo at 96
Unable to open file “.” for reading.