Calculate center of image

Question

lotus whit 2017-11-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/368901-calculate-center-of-image

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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Answer 1

KSSV 2017-11-24

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/368901-calculate-center-of-image#answer_292883

在 MATLAB Online 中打开

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')