How to get image from a matrix which contains PIXEL values ?

Hi,

I have an image of 400*400. I applied LBP to this and obtained 400*400 matrix which contains LBP value for each pixel. Now I want to convert this LBP matrix to an image. I was expecting some grey scale image, but instead I am getting with yellow color. Expecting something like this.

function LBP_Im = LBP(Input_Im, R)
% %=======================================================================
% %=======================================================================
% This function computes the LBP transformation of the input image
% Input_Im. 
% The parameters of the LBP operator are (P = 8, R), 
% where P - the number of sampling points in the region with the radius R. 
% Radius R is the input parameter of the function.
% Possible values for R = 1, 2, 3, etc.
% If input image is COLOR, then the grayscale transformation is performed.
% %=======================================================================
% %=======================================================================

Input_Im = imread('akaf.jpg');
R= 1
if size(Input_Im, 3) == 3
  Input_Im = rgb2gray(Input_Im);
end;
L = 2*R + 1; %%The size of the LBP label
C = round(L/2);
Input_Im = uint8(Input_Im);
row_max = size(Input_Im,1)-L+1;
col_max = size(Input_Im,2)-L+1;

%%for creating array of image dimensions
LBP_Im = zeros(row_max, col_max);
for i = 1:row_max
  for j = 1:col_max
      A = Input_Im(i:i+L-1, j:j+L-1);
      A = A+1-A(C,C);
      A(A>0) = 1;
      LBP_Im(i,j) = A(C,L) + A(L,L)*2 + A(L,C)*4 + A(L,1)*8 + A(C,1)*16 + A(1,1)*32 + A(1,C)*64 + A(1,L)*128;
  end;
end;

t = image(LBP_Im);

%

Answer 1

[Image Analyst]

It looks like some colormap is being applied for some reason. I know imagesc() does that but I didn't think image() did. Anyway, you should use imshow(), then call colormap() just to make sure it's gray scale.

imshow(LBP_Im, []);
colormap(gray(256));
colorbar;

[chinnurocks]

Thanks...

Answer 2

[Thorsten]

I used

Input_Im = imread('peppers.png');

and it worked fine. What do you get with peppers.png?