Grouping objects (blobs) in an image

Question

Aliyu Abdu 2012-5-31

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/39920-grouping-objects-blobs-in-an-image

回答： syeda saba 2021-1-25

I want to group a number of blobs in my image: https://www.dropbox.com/s/0d6mrvssx9vr3yg/im.png. The blobs are separated at certain distances from each other. Below is the code I'm working with;

 clc, close all, clear all
    I = imread('im.png'); 
    re = I;
      spacevector = zeros;
      n = 0;
      lines = 0;
      while 1
          [fl re]=lines_crop(re); %fl= first line, re= remaining image
          %imgn=fl;
          lines = lines + 1;
          rc = fl;
           while 1
              %Fcn 'letter_crop' separate letters in a line
              [fc rc space]=letter_crop(rc);  %fc =  first letter in the line
                                              %rc =  remaining cropped line
                                          %space = space between the letter
                                              %cropped and the next letter
              n = n + 1;
              spacevector(n)=space;
            if isempty(rc)  
                break;
            end
         end
        if isempty(re)  
            break
        end
    end
    median_space = median(spacevector); %Gets the median separation space.
    %figure,imshow(I);
   % title('Original binary Image')

Lines_crop: https://www.dropbox.com/s/ag31rp34gkm8um2/lines_crop.m Letter_crop: https://www.dropbox.com/s/n49dy4414c1f0dz/letter_crop.m

I have gotten the space between adjacent blobs in the "space_vector" as well as the "median" distance. What I want to do is to group blobs that are separated by the distance "median" in each line and assign a number such that the first group would be "1", second group "2".....and so on. I can't figure out how to do it . Please can anyone help? Thanks in advance.