How to calculate coordinate of binary iamges boundary??

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윤형 이
윤형 이 2023 年 1 月 26 日
回答済み: Image Analyst 2023 年 1 月 26 日
My goal is calculate the amplitude and wavelength from the binary iamges.
To do so, I want to get the coordinates of boundary line from the binary iamges.
Now I'm making code using "bwtraceboundary" function.
If you have any good ideas, please share them.
Thanks

採用された回答

Image Analyst
Image Analyst 2023 年 1 月 26 日
It looks like the boundary is pretty solid and you probably just want the top row, not the sides and bottom. So in that case I'd just scan your image to find the top row. If mask is your binary image:
[rows, columns] = size(mask);
topRows = nan(1, columns);
for col = 1 : columns
t = find(mask(:, col), 1, 'first')
if ~isempty(t)
topRows(col) = t;
end
end

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