I am trying to segment the image into 3 layers Mask, FG and BG. I have attached my code and please help me......

I tried to segment image into Mask, FG and BG but i am not getting correct output. Mak layer must contain Text part of image ( Mask will be in binary form), FG contains image or graphs and BG contains color of text. How can i do this. My code is i=imread('20.jpg'); grayImage=rgb2gray(i); % Get the dimensions of the image. numberOfColorBands should be = 1. [rows columns numberOfColorBands] = size(grayImage); % Integer image. imageToThreshold = grayImage; startingLowThreshold = 100; startingHighThreshold = 250; % Let's compute and display the histogram. [pixelCount grayLevels] = imhist(grayImage); subplot(2, 3, 2); bar(pixelCount); title('Histogram of Original Image'); xlim([0 grayLevels(end)]); % Scale x axis manually. grid on; binaryImage = (imageToThreshold > startingLowThreshold) & (imageToThreshold < startingHighThreshold);

subplot(2,2,2); imshow(binaryImage, []); axis off; title('Mask of the image'); subplot(2,2,1);imshow(i); title('Input Image');% original image

set(gcf, 'Position', get(0,'Screensize')); 
      drawnow; % Force display to update immediately.
      % Let's process this to get the background, which will be the smooth areas.
      filteredImage = entropyfilt(grayImage, ones(15));

        binaryImage = filteredImage > 4;
        binaryImage = imfill(binaryImage, 'holes');

        % Fill in the textured areas with local background
        % to get an estimate of what the background
        % would be without the objects in there.
        BackgroundImage = roifill(grayImage, binaryImage);
        subplot(2, 2, 3);
        imshow(BackgroundImage, []);  % Display image.
        title('Foregroung Image');
        binar = filteredImage < 5;
        ForegroundImage = roifill(grayImage, binar);
        subplot(2, 2, 4);
        imshow(ForegroundImage, []);  % Display image.
        title('Background Image');