count rectangular and circles

Question

Tu Nguyen 2022-4-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1696245-count-rectangular-and-circles

评论： DGM 2022-4-15

Hi all,

I want to count how many rectangular and circles in the image? what is the difference between rectagular and circle in matlab regionprops?

Also, I want to count how many rectangular and circles, both with holes in the image?

Finally, I want to export a figure just square and rectangular only.

Thank you for your help

clc;
close all;
clear;
A = imread('Shapes_with_holes.png');
A = imbinarize(A);
[label counts]= bwlabel(A);
imshow(A);
stats = regionprops(A,'Circularity','Centroid','Area','Perimeter','Solidity','FilledArea');
filledImage = imfill(A,'holes');
boundaries = bwboundaries(filledImage);
circularity = [stats.Circularity];
perimeters = [stats.Perimeter];
area = [stats.Area];
filledarea = [stats.FilledArea];
solidities = [stats.Solidity];
Centroid = [stats.Centroid];
circularities = perimeters.^2./(4*pi*filledarea);
hold on;
for blobNumber = 1 : counts
  if circularities(blobNumber) < 1.19
    theLabel = 'Circle';
  elseif circularities(blobNumber) < 1.53
    theLabel = 'Rectangle';
  else
    theLabel = 'Triangle';
  end
  text(stats(blobNumber).Centroid(1), stats(blobNumber).Centroid(2),...
    theLabel, 'Color', 'r');
end

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Tu Nguyen 2022-4-14

I read the answer, however, they use a function minboundrect that is the built-in function. Do you have any method that classify rectangular and circles ny metric value?