Undefined function or variable 'X'

Hi,

I want to make a fusion of two images using this example:

http://www.mathworks.com/help/wavelet/examples/image-fusion.html?prodcode=WA&language=en

but when i write

load('D:\pix.jpg');X1 = X;

then i receive the message :

Undefined function or variable 'X'.

What can I do to fix it? And what are X1 = X; and X2 = X;,can you explain me, pls?

Answer 1

[Thorsten]

In the example, a variable X is stored in mask.mat and bust.mat, that are assinged to X1 and X2, resp., after loading. If you don't have these file, the code does not work.

You need to modify it such hat two images are stored in X1 an X2.

To read an image, use

 X1 = imread('D:\pix.jpg');

[Nokia Nokia]

Thanks a lot! :) But now when I continue to write the commands I receive another error message: colormap(map); Undefined function or variable 'map'. What to do now?

[Image Analyst]

You need to assign a map, like

myColorMap = jet(256);
colormap(myColorMap);

[Nokia Nokia]

Thank you! :) But another error has occured: subplot(221), image(X1), axis square, title('Mask') subplot(222), image(X2), axis square, title('Bust') subplot(223), image(XFUSmean), axis square, title('Synthesized image, mean-mean') subplot(224), image(XFUSmaxmin), axis square, title('Synthesized image, max-min') Error using image TrueColor CData contains element out of range 0.0 <= value <= 1.0

Now what?

[Thorsten]

You should scale your images to the range [0,1].

[Nokia Nokia]

How to scale my image to the desired range? What command to use? Do I need to convert it to grayscale?

[Thorsten]

 I01 = double(I)/double(max(I(:)));

[Nokia Nokia]

 it's written: 
Undefined function or variable 'I'.

[Thorsten]

I is the image to be normized. Use your variable.

[Nokia Nokia]

So I have to put the image and the pathway instead I like,right? :

I01 = double('D:\pix1.jpg')/double(max('D:\pix1.jpg'(:)));
I02 = double('D:\pix2.jpg')/double(max('D:\pix2.jpg'(:)));

Now i see more error messages :(

Can you tell me what to do now in detail?

[Thorsten]

To read an image from file, and convert to double in the range [0,1]:

 I01 = im2double(imread('D:\pix1.jpg'));

To normalize data

 X = X/max(X(:));

[Nokia Nokia]

I tried this and i tried this too:

clear all

   X1 = imread('G:\an1.jpg');
   X2 = imread('G:\an2.jpg');
   XFUSmean = wfusimg(X1,X2,'db2',1,'mean','mean');
   XFUSmaxmin = wfusimg(X1,X2,'db2',1,'max','min');
   myColorMap = jet(256);
   colormap(myColorMap);
   X1 = double(imread('G:\an1.jpg'))/255;
   X2 = double(imread('G:\an2.jpg'))/255;
   subplot(221), image(X1), axis square, title('Mask')
  subplot(222), image(X2), axis square, title('Bust')
  subplot(223), image(XFUSmean), axis square,
  title('Synthesized image, mean-mean')
  subplot(224), image(XFUSmaxmin), axis square,
  title('Synthesized image, max-min')

Again an error message:

Error using image
TrueColor CData contains element out of range 0.0 <= value <= 1.0

[Walter Roberson]

What is max(XFUSmean(:)), min(XFUSmean(:))

[Nokia Nokia]

I reduced the images' pixels and now i see the message: Error using wfusimg (line 150) Input images must be of the same size.

[Nokia Nokia]

To Walter Roberson

Merge the two images from wavelet decompositions at level 1 using db2 by taking two different fusion methods: fusion by taking the mean for both approximations and details:

XFUSmean = wfusimg(X1,X2,'db2',1,'mean','mean'); and fusion by taking the maximum for approximations and the minimum for the details.

XFUSmaxmin = wfusimg(X1,X2,'db2',1,'max','min');

[Nokia Nokia]

now I tried to use the same picture X1 = imread('G:\an1.jpg'); X2 = imread('G:\an1.jpg');

and again: Error using image TrueColor CData contains element out of range 0.0 <= value <= 1.0