MATLAB: How to select boundary box

bounding boxImage Processing Toolboxselect boundary box

How to select boundary box of 221.jpg and crop it like 222.jpg ?

221.jpg

222.jpg

Best Answer

Thanks for everyone who tried to help me. Finally I found the simple way to do it. this is a really awesome method. bwconvhull(Iout)

This is the code segment;

if true
  LB = 100;
  UB = 100000;
  IL = bwlabel(Ifill);
  R = regionprops(Ifill,'Area');
  ind = find([R.Area] >= LB & [R.Area] <= UB);
  Iout = ismember(IL,ind);
  %Ibw1=imcomplement(Iout);
  CH = bwconvhull(Iout);
    %Ibw3=imcomplement(CH);
    [Ilabel num] = bwlabel(CH);
    Iprops = regionprops(Ilabel);
    Ibox = [Iprops.BoundingBox];      
    Icrop = imcrop(I,Ibox);
    resized=imresize(Icrop,[100 100]);
end

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MATLAB: Why imfill resul is a white figure

Your image had a white frame/border around it. Use imclearborder() to get rid of that. See corrected code:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
rgbImage = imread('hole.png');
subplot(2,2,1)
imshow(rgbImage)
title('Original Image', 'FontSize', fontSize);
% 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') 
%binarization
binaryImage = im2bw(rgbImage);
% Display this image.

subplot(2,2,2);
imshow(binaryImage);
title('Original Binary Image', 'FontSize', fontSize);
% Important: Get rid of surrounding white border (frame):
binaryImage = imclearborder(binaryImage);
% Display this image.
subplot(2,2,3);
imshow(binaryImage);
title('Frame now removed', 'FontSize', fontSize);
%  Close the holes
filledImage = imfill(binaryImage, 'holes');
subplot(2,2,4);
imshow(filledImage);
title('Image without frame or holes', 'FontSize', fontSize);

MATLAB: Read three different RGB band and Swap the Band

Try this:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Now swap around in any way you want.
newRedChannel = greenChannel;
newGreenChannel = blueChannel; 
newBlueChannel = redChannel;
% Recombine separate color channels into a single, true color RGB image.
NewRgbImage = cat(3, newRedChannel, newGreenChannel, newBlueChannel);

Best Answer

Related Solutions

MATLAB: Why imfill resul is a white figure

MATLAB: Read three different RGB band and Swap the Band

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