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Loading many images

Started by Unknown ●October 21, 2002
hi,

I have around 1000 images which I need to load in to matlab and do some
operations on. The problem is that the images have random names without
any order. Any suggestions on how I could read them in to matlab?

thanks
mehdi



Reply by navaneetha krishnan ●October 21, 20022002-10-21
Hi,

You can probably use the dir command in the following
way.

D = dir;

This will return array of structures with the name and
other properties of the files like size in the current
directory. You can then loop over the structures to
read the files using imread(D(i).name);

Navan

--- wrote:
> hi,
>
> I have around 1000 images which I need to load in to
> matlab and do some
> operations on. The problem is that the images have
> random names without
> any order. Any suggestions on how I could read them
> in to matlab?
>
> thanks
> mehdi


__________________________________________________

Reply by Joe Sababa ●October 21, 20022002-10-21
Hi,
Make a list of the files :
File_list = {''dog', 'Cat', 'Giraf',.... ,'Panda'}; %
suppose these are the files names
Make a calling loop:
for n=1:length(File_list)
eval(['M' num2str(n) ' =
mread(File_list{n},''jpg'');']) % suppose the images
are of JPEG type
end
You will get all the images as M1, M2, ...., M1000 if
and only if there is enough memory for that.
If you can do the operation on the images one by one
than, leave out the num2str(n) token and do the
operation within the loop.

Joe
BSTeX- Equation viewer for Matlab
http://www.geocities.com/bstex2001 --- wrote:
> hi,
>
> I have around 1000 images which I need to load in to
> matlab and do some
> operations on. The problem is that the images have
> random names without
> any order. Any suggestions on how I could read them
> in to matlab?
>
> thanks
> mehdi >

__________________________________________________

Reply by Jeff Brower ●October 21, 20022002-10-21
Mehdi-

> I have around 1000 images which I need to load in to matlab and do some
> operations on. The problem is that the images have random names without
> any order. Any suggestions on how I could read them in to matlab?

They are filenames? If so, go to DOS prompt (yep it still works) and type:

dir *.jpg > image_list.txt

Edit that list as needed with some mass-replace and then read into your MATLAB
code
or just put into your code directly. From there you're on your own.

Jeff Brower
DSP sw/hw engineer
Signalogic