Calculate center of image

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lotus whit
lotus whit on 23 Nov 2017
Commented: Image Analyst on 24 Nov 2017
i would ask how I can draw line pass through the center of image then across whole image end to end
figure ,imshow(whole_image)
figure,imshow(whole_image)
whole_image = imresize(whole_image,[500 750]);
se=strel('disk',50);
img_2=imdilate(whole_image,se);
di_imag = imdilate(whole_image,se);
imshow(di_imag), title('dilated')
rstats_w = regionprops(whole_image, 'Centroid');
Center_word =rstats_w.Centroid;%calculate center of word
hold on;
p1 = [Center_word(1) 0];
p2 = [Center_word(1) 750]
plot (p1,p2)

Accepted Answer

KSSV
KSSV on 24 Nov 2017
I = imread('coins.png');
[ny,nx] = size(I) ;
imshow(I) ;
hold on
% Center
C = round([nx ny]/2) ;
plot(C(1),C(2),'*r') % mid point/ center of image
%%Draw line
P1 = [1 nx] ;
P2 = [C(2) C(2)] ;
plot(P1,P2,'b')
%
P3 = [C(1) C(1)] ;
P4 = [1 ny] ;
plot(P3,P4,'b')
  2 Comments
Image Analyst
Image Analyst on 24 Nov 2017
This will plot in the overlay above the image. If you want to burn the lines actually into the pixels of the image, see the attached demo.

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