Greetings, how to calculate area and parameter of cell.

Question

alice shaarveina 2018-3-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387906-greetings-how-to-calculate-area-and-parameter-of-cell

评论： Image Analyst 2018-3-13

采纳的回答： Image Analyst

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Answer 1

Image Analyst 2018-3-13

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387906-greetings-how-to-calculate-area-and-parameter-of-cell#answer_309759

在 MATLAB Online 中打开

See my Image Segmentation Tutorial: https://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862&sort=downloads_desc

In short

binaryImage = yourImage < 128;
props = regionprops(binaryImage, 'Area', 'Perimeter');
allAreas = [props.Area]
allPerimeters = [props.Perimeter];

You can add other parameters is you wish.

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alice shaarveina 2018-3-13

error.png

I tried, but it shows this kind of error Sir.

Image Analyst 2018-3-13

Get rid of the space you have after Perimeter.

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Answer 2

KSSV 2018-3-13

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387906-greetings-how-to-calculate-area-and-parameter-of-cell#answer_309760

在 MATLAB Online 中打开

I = imread('cell.bmp') ;
imshow(I) ;
I = imcrop(I) ;  % crop the required region 
[y,x] = find(I~=255) ;
idx = kmeans([x y],7) ;   % segment the cells 
Area = zeros(7,1) ;
P = zeros(7,1) ;
imshow(I)
hold on
for i = 1:7
    plot(x(idx==i),y(idx==i),'.','color',rand(1,3)) ;
    id = boundary(x(idx==i),y(idx==i)) ;
    Area(i) = polyarea(x(id),y(id)) ;
    d = cumsum(sqrt((diff(x(id))).^2+(diff(y(id))).^2)) ;
    P(i) = d(end) ;
end