Find location of 2 black dots in the image

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Ankit Gupta 2023-2-6

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https://ww2.mathworks.cn/matlabcentral/answers/1907445-find-location-of-2-black-dots-in-the-image

评论： Ankit Gupta 2023-2-6

采纳的回答： Walter Roberson

im1.png

Hi,

I have a videfile with around 330 frames in each frame I have 2 dots whose location changes in each frame. How can i find the location(x, y value) of 2 dots in a given frame. See attached frame image.

Thanks,

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采纳的回答

Walter Roberson 2023-2-6

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https://ww2.mathworks.cn/matlabcentral/answers/1907445-find-location-of-2-black-dots-in-the-image#answer_1164875

See regionprops probably with 'Centroid'

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Walter Roberson 2023-2-6

在 MATLAB Online 中打开

filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/1286115/im1.png';

a = imread(filename);

BW = imbinarize(imcomplement(rgb2gray(a)));

BW = bwareafilt(BW, 2);

s = regionprops(BW, 'centroid');

centroids = cat(1, s.Centroid);

image(a);

hold on

scatter(centroids(:,1), centroids(:,2), 'r*')

hold off

The small black marks on the image are the place the time is written.

Ankit Gupta 2023-2-6

thanks a lot, this was helpful.

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