How to find coordinates of the centroid of objects(found with bwlabel function) with area more than 3 pixels in the attached image?

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Penny13 2018-10-23

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https://ww2.mathworks.cn/matlabcentral/answers/425717-how-to-find-coordinates-of-the-centroid-of-objects-found-with-bwlabel-function-with-area-more-than

评论： Penny13 2018-10-23

PrimaryOrange.jpg

Hello all, I have the attached image and using bwlabel MATLAB built-in function, I got the number of objects. Then I want to find the coordinates of the centroid of objects with more than three pixels;In the code I wrote bwlabel gives me 1279 objects and the with this line(allAreas= allAreas(allAreas>3);),the number of objects will be 665 in the workspace, but when I wrote the for loop,it started with the first object in the stats structure which its area is 1 pixel. Thanks

a = imread('PrimaryOrange.jpg');
bg=rgb2gray(a);
threshold = 20;
bw=bg> threshold;
out=bw;
L = bwlabel(out);
[labeledImage, numberOfObject] = bwlabel(out);
props = regionprops(labeledImage, 'Area');
allAreas = [props.Area];
stats = regionprops('table',labeledImage,'Area','Centroid',...
    'MajorAxisLength','MinorAxisLength','Perimeter')
   allAreas= allAreas(allAreas>3);
for i= 1 : numberOfObjects
     x_object= stats.Centroid(i,1);
     y_object= stats.Centroid(i,2);
     new_x= ceil(x_object )+ 30
     new_y=ceil(y_object)+30
     new_x_y= [new_x new_y]
     if BWdapi(new_x_y) == 1
     antibody = [antibody ; new_x_y]
     end
end