find the third point
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this is my code
%%%%%%%%%%%%%%%%%%%%%%%%%
clear all;
[filename pathname]=uigetfile('*.jpg;*.png;*.tif;*.tiff;*.gif;*.bmp;');
inputimage=imread([pathname filename]);
I=inputimage;
I = rgb2gray(I) ;
[y,x] = find(I) ;
figure
imshow(I)
hold on
plot(x,y,'.b')
plot(x(1),y(1),'*y')
plot(x(end),y(end),'*r')
line([x(1),0],[y(1), 0])
line([x(end),0],[y(end), 0])
figure(1);line([0 1],[0 1]);
%%%%%%%%%%%%%%%%%%%%%%
i wana to find the mid point between the yellow point and red point.... the mid poit is that point where the curve become bended........... as shown the point by arrow...
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/167074/image.png)
orignal image
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/167075/image.png)
ofter code
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/167076/image.png)
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