How to divide an image into upper and lower regions

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Elysi Cochin on 2 Feb 2017

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Answered: Vandana Rajan on 2 Feb 2017

How to divide an image into upper and lower regions and get those into separate variables, based on the centroid point, so that i need to compute the area, separately.

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Answer 1

KSSV on 2 Feb 2017

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https://in.mathworks.com/matlabcentral/answers/322979-how-to-divide-an-image-into-upper-and-lower-regions#answer_253017

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I = imread('your image');   % read image 
Ibw = im2bw(I);            
Ilabel = bwlabel(Ibw);   
stat = regionprops(Ilabel,'centroid');   % get centroid 
imshow(I); hold on;
plot(stat.Centroid(1),stat.Centroid(2),'ro');
%%dive the image 
c = fix(stat.Centroid) ;
I1 = I(1:c(1),:,:) ;
I2 = I(c(1)+1:end,:,:) ;
figure ; imshow(I1) ; 
figure ; imshow(I2) ;