Removing the shadow from image

I have an image in which i have to remove the shadows from it ,please help how to process.I have uploaded the Image

Answer 1

[Image Analyst]

Go to Section 8.3.10.1 here: http://iris.usc.edu/Vision-Notes/bibliography/contentssegment.html#2-D%20Region%20Segmentation%20Techniques,%20Snakes,%20Active%20Contours Pick an algorithm and code it up.

[kash]

I tried using the code

I = imread('imagesh1.bmp');
       J = im2double(I);

        R = J(:,:,1);
        G = J(:,:,2);
        B = J(:,:,3);

       [len,wid] = size(R);

       % Generation of 2-D Log Chromaticity Image.
       for i = 1:len
          for j = 1:wid
             if ((R(i,j)*G(i,j)*B(i,j))~= 0)
                c1(i,j) = R(i,j)/((R(i,j)*G(i,j)*B(i,j))^(1/3));
                c2(i,j) = G(i,j)/((R(i,j)*G(i,j)*B(i,j))^(1/3));
                c3(i,j) = B(i,j)/((R(i,j)*G(i,j)*B(i,j))^(1/3));
             else
                c1(i,j) = 1;
                c2(i,j) = 1;
                c3(i,j) = 1;
          end
      end
  end

rho1 = mat2gray(log(c1));
rho2 = mat2gray(log(c2));
rho3 = mat2gray(log(c3));

X1 = mat2gray(rho1*1/(sqrt(2)) - rho2*1/(sqrt(2))); %(1/sqrt(2); -1/sqrt(2); 0)
X2 = mat2gray(rho1*1/(sqrt(2)) + rho2*1/(sqrt(2)) - rho3*2/(sqrt(6))); %(1/sqrt(6); 1/sqrt(6); -2/sqrt(6))

theta = 10;

InvariantImage = cos(theta*pi/180)*X1 + sin(theta*pi/180)*X2;

imshow(InvariantImage)

but could not get the correct answer,i need the output as in the link

can u tell where had made mistake please

[Keerthi D]

sir l tried this code but it not work.

its output is:

sir how to solve this problem .

[Image Analyst]

The attached algorithm looks pretty simple. Try it.

[Keerthi D]

I didn't get

[Image Analyst]

Maybe someone else you work with could understand it and explain it to you? Otherwise, pick a different shadow removal algorithm that you can understand.