currently i am doing project on secured image compression using independent component analysis and neural network... so as a resultant i am getting white image. my code is as follows:

clc;
clear all;
i1=imread('t1.jpg');
i2=rgb2gray(i1);
p=imresize(i2, ([256 256]));
subplot(3,3,1)
imshow(p);
pa=p(:);
pb=pa';
k1=kurtosis(double(pb(:)));
i3=imread('t2.jpg');
i4=rgb2gray(i3);
q=imresize(i4, ([256 256]));
subplot(3,3,2)
imshow(q);
qa=q(:);
qb=qa';
k2=kurtosis(double(qb(:)));
i5=imread('t3.jpg');
i6=rgb2gray(i5);
s=imresize(i6,([256 256]));
subplot(3,3,3)
imshow(s);
sa=s(:);
sb=sa';
k3=kurtosis(double(sb(:)));
k=[k1 k2 k3];
s1=[pb;qb;sb];
a=5; b=10;
a1=unifrnd(a,b,3,3);
x=a1*double(s1);
figure(2)
imshow(x)

[Geoff Hayes]

Tanvi - is your question related to "why" you are observing a white image? What is the above code doing? Please provide some comments so that we can try to understand what it is you are trying to do with the code.

[Tanvi]

basically , i am trying to multiply an image with a randomly generated matrix. but in this case, instead of getting mixed image i am getting a white image. and also when i am doing imshow(a1) where a1 is randomly generated matrix is coming white. so please help me out with this.

[Geoff Hayes]

When you run the code, are you observing any errors?

Answer 1

[Siam]

You need to work with pb,qb,sb. Did you check what pb, qb and sb gives you?

[Tanvi]

yeas, i checked it.. it is also giving me a white image..

[Siam]

That is what your code is doing. you can use imresize() for pb,qb and sb. It will probably fix the issue for white image for pb, qb and sb. you need to work with

x=a1*double(s1);

lastly to get the result.

[Tanvi]

ok.. thank you... my problem is resolved now..

[Siam]

Glad to hear that your issue has been fixed.