MATLAB: Detect Circles and squares on the image using regionprops

Image Processing ToolboxMATLABmorphologysegmantationshape recognition

Now , i have image called "test.png" and my question is how to detect circles with & without holes and display each of them in single figure and here is my code but desn't work with me , so need help 
I = imread('test.png');
imshow(I);
I = rgb2gray(I);
I = im2bw(I,0.01);
[L ,num] = bwlabel(I);
stats1 = regionprops (L,'EulerNumber' , 'Area' , 'Perimeter' , 'BoundingBox');
sum = 0;
for R=1:num
% this way desn't work but maybe it just need a little changes     
%     x = uint8 (stats1(R).BoundingBox(1));
%     y = uint8 (stats1(R).BoundingBox(2));
%     if (I(x,y) == 0)
%         sum = sum + 1;
%         bb = stats1(R).BoundingBox;
%         rectangle('position',bb,'edgecolor','r','linewidth',1.3);
%     end
        circularity = (stats1(R).Perimeter .^ 2) ./ (4 * pi * stats1(R).Area);
        if (circularity >= 1.1)
            sum = sum + 1;
            bb = stats1(R).BoundingBox;
            rectangle('position',bb,'edgecolor','r','linewidth',1.3);
        end
end
disp(sum);

Best Answer

try this
I = imread('test.png');
imshow(I);
I = rgb2gray(I);
I = im2bw(I,0.01);
[L ,num] = bwlabel(I);
stats1 = regionprops (L,'EulerNumber' , 'Area' ,'ConvexArea', 'Perimeter' , 'BoundingBox');
sum1 = 0;
sum2 = 0;
for R=1:num
    circularity = (stats1(R).Perimeter .^ 2) ./ (4 * pi * stats1(R).ConvexArea);
    if (circularity < 1) %Circles
        if stats1(R).EulerNumber == 1
            sum1 = sum1 + 1;
            bb = stats1(R).BoundingBox;
            rectangle('position',bb,'edgecolor','r','linewidth',1.3);
        end
        if stats1(R).EulerNumber < 1
            sum2 = sum2 + 1;
            bb = stats1(R).BoundingBox;
            rectangle('position',bb,'edgecolor','y','linewidth',1.3);
        end
        
    end
end
disp(sum1); %circle without holes
disp
(sum2); %circle with holes
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