red , green and blue part from Exponential image

    subplot(2,2,1); imshow(rgb),title('Original RGB');

    [row col wid] = size(rgb);

       % Log transformation 
    for i=1:size(rgb,1) 
    for j=1:size(rgb,2) 
    in = double(rgb(i,j)+1); 
    L(i,j) = log2(in);
     end
     end

            % Exponantial transformation
     for i=1:size(rgb,1)
     for j=1:size(rgb,2)
     in = double(L(i,j)+1);
     E(i,j) = exp(in);
     end 
    end

       % convert to 8-bit % figure 
     logT = (L/(max(L(:))))*255; % L ;
       expT = (E/(max(E(:))))*255; %E ;

     subplot(2,2,2);
     imshow(logT,[]),title('Log Transformed'); 
       %      imshow(I,[low high]) displays the gray scale image I, specifying the
       %      display range as a two-element vector, [low high].
    subplot(2,2,3); 
    imshow( expT , [ ] ) , title('Exponential of Log Transformed');

            if true
              % code
            end

Now i want to get red , green and blue part from Exponential image

Answer 1

[Image Analyst]

What is wid (the number of color channels)? If it's 3, like for a normal RGB image, then using code like:

in = double(rgb(i,j)+1);

could lead to unintended consequences. If rgb is a 3 dimensional matrix, what value do you think you'll get if you supply indexes for only 2 of the dimensions and not the third dimension?

What does this show:

whos logT

[Amir Khan]

it's 3 . wid is R G B

the value of " whos logT is

 Name       Size            Bytes  Class     Attributes

logT      59x92            43424  double

[Amir Khan]

Name      Size            Bytes  Class     Attributes

in        1x1                 8  double              

Name       Size            Bytes  Class     Attributes

E         59x92            43424  double              

Name       Size            Bytes  Class     Attributes

logT      59x92            43424  double

[Image Analyst]

Why are you not referring to all 3 indexes in the rgb() matrix?

[Amir Khan]

Thnx alot ..