Calculate center of image

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lotus whit
lotus whit 2017-11-23
评论： Image Analyst 2017-11-24
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)

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采纳的回答

KSSV
KSSV 2017-11-24
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 个评论
Image Analyst
Image Analyst 2017-11-24
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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