# take largest connected components in 2D slices and then reconstruct the 3D by stacking them

Hello,

I am doing some morphological image processing. I want to remove the 4 unwanted blobs from the binary object(image below)

If I axially slice the image, I can take the largest connected component and exclude others like the image below:

I have tried the following codes which results binary size mismatch issues.

`ind = 1;sz = size(bi) % bi is the 3D mask with dimension: 170x256x100final_mask = zeros(sz) for i = 1:sz(3) %taking the 2D axial slice iterations->  1:100    cc = bwconncomp(bi(:,:,i)); %     disp(cc)    S = regionprops(cc, 'Area', 'PixelIdxList');%'Centroid');    ax_slice = zeros(sz(1), sz(2));    numPixels = cellfun(@numel, cc.PixelIdxList);%     disp(numPixels)    [biggest,idx] = max(numPixels); % taking the largest component number of pixels and their indices    ax_slice(cc.PixelIdxList{idx})= 1;    final_mask(:,:,i) = ax_slice;end`

Please let me know how to deal with it.

NOTE:-

Matlabsolutions.com provide latest MatLab Homework Help,MatLab Assignment Help for students, engineers and researchers in Multiple Branches like ECE, EEE, CSE, Mechanical, Civil with 100% output.Matlab Code for B.E, B.Tech,M.E,M.Tech, Ph.D. Scholars with 100% privacy guaranteed. Get MATLAB projects with source code for your learning and research.

• erode image
• dilate image
`clc                         % clear command windowcla                         % clear axesbi11 = bi;                  % create copy of 'bi'bi1 = bi(:,:,170:end);      % get top partR = 2;                      % radius of structuring element[x,y,z] = meshgrid(-R:R);   % X Y Z 3d matricesel = x.^2+y.^2+z.^2 <= R^2; % sphere of radius 'R'bi2 = imerode(bi1, el);     % erode imagebi3 = imdilate(bi2, el);    % dilate imagebi11(:,:,170:end) = bi3;    % replace original top partisosurface(bi11,.95)        % display 3d imageaxis vis3dlight`

--

--

## More from Technical Source

Simple! That is me, a simple person. I am passionate about knowledge and reading. That’s why I have decided to write and share a bit of my life and thoughts to.

Love podcasts or audiobooks? Learn on the go with our new app.

## Technical Source

Simple! That is me, a simple person. I am passionate about knowledge and reading. That’s why I have decided to write and share a bit of my life and thoughts to.