How to get coordinates of shapes in image?
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Hello,
I have an image with three different shapes on it and need to get the coordinates of the middle of each shape. I would be grateful for help in solving the problem.
Thanks a lot!
The Image is in the attachment
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Image Analyst
2020-11-30
Each shape has lots of coordinates. Do you want them all? If so, why? Or do you just want the centroids?
Check out the Color Thresholder on the Apps tab of the tool ribbon.
Check out my Image Segmentation Tutorial and color segmentation tutorials in my File Exchange:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/435638/image.png)
回答(1 个)
Shubham Rawat
2020-12-4
Hi Fabian,
You may use regionprops function to calculate the centroid of each shape. Here is the link to the documentation:
For this particular figure i have created a demo code. You may also look into that and take some help:
a = imread('punkty.jpg'); %reading image
I = rgb2gray(a); %change image into grayscale
bw = I < 100; %change image into Black and White
stats = regionprops(bw,'Centroid'); %resulting Centroid of each image
%to show the image with centroids
imshow(bw)
hold on
plot(centers(:,1),centers(:,2),'b*')
hold off
Hope this helps!
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