how can give an image as input in a fuction?

hi I want to define a function that every time that I call it, it get an image address and do some process on this image I don't want to use 'input.tif' because I want to use this function in a loop and use the result of this for the next image...

if true
 function [ maskedImage] = myprog(folder,baseFileName)
fullFileName = fullfile(folder, baseFileName);
grayImage = imread(fullFileName);
....
end

end

[Adam]

What is wrong with the code you posted to do this?

[sara]

when I run the program and use myprog ('folder','baseFileName.tif') it gives me this error

if true
  Reference to a cleared variable folder.
Error in myprog (line 29)
end

[Image Analyst]

We don't know what line 29 is. You forgot to post the error message - you just snipped out an almost useless part of it. Please post ALL the red text - don't snip out part of it or paraphrase it, just give it exactly. Presumably you called it with an actual names of some folder and file and didn't pass in 'folder' and 'baseFileName.tif'.

[sara]

line 29 is

grayImage = imread(fullFileName);

I attach my code below thanks Image Analyst

Answer 1

[Image Analyst]

In myprog(), you have this line:

clear;  % Erase all existing variables. Or clearvars if you want.

you must remember to never, ever have that in a function . If you use it, it must be in a script . What happens is that when you call clear, it wipes out the filename that you passed in.

[sara]

oh thanks dear Image Analyst you are a clever person.. I have an other question... if I want to save the results of my code in an array Is there any way to save them ...I mean that I want to have an array that I can to save for 6 grayscale images in it...I couldn't save 6 images in an array.... thanks

Answer 2

[Iain]

Ok, if by "image" you mean filename, then you can do it like this:

 folder = 'C:\My Images\';
 files = dir([folder '\*.jpg']);

 for i = 1:numel(files)
  filename = [folder files(i).name];  
  % ... etc etc
 end

[David Young]

It's more robust to use

filename = fullfile(folder, files(i).name);

Answer 3

[sara]

thanks but when I do what you say .I have this error

if true
  Reference to a cleared variable fullFileName
end
..

I attach my codes I want to use myprog in loop ...do you know where did I do wrong??

Answer 4

[sara]

ok. thanks I am beginner can you help me more? I was in the folder that includes my images. I use this

if true
  filename=ones(1,12);
files = dir(['\*.tif']);
for i = 1:12(files)
filename = files(i)
end
end

but I have this message:

if true
 files = 
0x1 struct array with fields:
  name
  date
  bytes
  isdir
  datenum  end

where is my error... thanks.