MATLAB: How to separate the whole lip image into upper and lower part using code

Image Processing Toolboxlip

Best Answer

  • Do you mean like this:
    clc; % Clear the command window.
    close all; % Close all figures (except those of imtool.)
    clear; % Erase all existing variables. Or clearvars if you want.
    workspace; % Make sure the workspace panel is showing.
    format long g;
    format compact;
    fontSize = 15;
    %===============================================================================

    % Get the name of the image the user wants to use.
    baseFileName = 'originalimage.jpg';
    % Get the full filename, with path prepended.
    folder = pwd
    fullFileName = fullfile(folder, baseFileName);
    % Check if file exists.
    if ~exist(fullFileName, 'file')
    % The file doesn't exist -- didn't find it there in that folder.
    % Check the entire search path (other folders) for the file by stripping off the folder.
    fullFileNameOnSearchPath = baseFileName; % No path this time.
    if ~exist(fullFileNameOnSearchPath, 'file')
    % Still didn't find it. Alert user.
    errorMessage = sprintf('Error: %s does not exist in the search path folders.', fullFileName);
    uiwait(warndlg(errorMessage));
    return;
    end
    end
    %===============================================================================
    % Read in demo image.
    rgbImage = imread(fullFileName);
    % Get the dimensions of the image.
    [imageRows, imageColumns, numberOfColorChannels] = size(rgbImage);
    % Display the original image.
    subplot(3, 3, 1);
    imshow(rgbImage, []);
    axis on;
    caption = sprintf('Original Color Image, %s', baseFileName);
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    % Set up figure properties:
    % Enlarge figure to full screen.
    set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
    % Get rid of tool bar and pulldown menus that are along top of figure.
    set(gcf, 'Toolbar', 'none', 'Menu', 'none');
    % Give a name to the title bar.
    set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')
    drawnow;
    hp = impixelinfo(); % Set up status line to see values when you mouse over the image.
    % Crop the image
    rgbImage = rgbImage(29:391, 87:762, :);
    % Convert to HSV color space so we can segment the saturation channel.
    hsvImage = rgb2hsv(rgbImage);
    sImage = hsvImage(:, :, 2);
    % Display the image.





    subplot(3, 3, 2);
    imshow(sImage, []);
    axis on;
    caption = sprintf('Saturation Image');
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    drawnow;
    % Display the histogram
    subplot(3, 3, 3);
    histogram(sImage);
    grid on;
    title('Histogram of Saturation Image', 'FontSize', fontSize);
    % Threshold the image
    saturationThreshold = 0.15;
    mask = sImage > saturationThreshold;
    % Fill holes.
    mask = imfill(mask, 'holes');
    % Extract the two largest blobs only.
    mask = bwareafilt(mask, 2);
    % Put a red line at the threshold.
    line([saturationThreshold, saturationThreshold], ylim, 'Color', 'r', 'LineWidth', 3);
    % Display the image.
    subplot(3, 3, 4);
    imshow(mask, []);
    axis on;
    caption = sprintf('Mask Image');
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    drawnow;
    % Give each blob an ID number.
    labeledImage = bwlabel(mask);
    % Get the top and bottom mask
    topMask = ismember(labeledImage, 1);
    bottomMask = ismember(labeledImage, 2);
    % Display the image.
    subplot(3, 3, 5);
    imshow(topMask, []);
    axis on;
    caption = sprintf('Top Mask Image');
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    drawnow;
    % Display the image.
    subplot(3, 3, 6);
    imshow(bottomMask, []);
    axis on;
    caption = sprintf('Bottom Mask Image');
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    drawnow;
    % Mask the original RGB image and display.
    % Mask the image using bsxfun() function
    topMaskedRgbImage = bsxfun(@times, rgbImage, cast(topMask, 'like', rgbImage));
    bottomMaskedRgbImage = bsxfun(@times, rgbImage, cast(bottomMask, 'like', rgbImage));
    % Display the image.
    subplot(3, 3, 7);
    imshow(topMaskedRgbImage, []);
    axis on;
    caption = sprintf('Top Mask Image');
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    drawnow;
    % Display the image.
    subplot(3, 3, 8);
    imshow(bottomMaskedRgbImage, []);
    axis on;
    caption = sprintf('Bottom Mask Image');
    title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
    drawnow;