How to find out the intersection point of the image ?. (Intersection point: Where the X and Y White lines meets)

The link for the image : http://imageshack.us/photo/my-images/401/0mbt.jpg/

Answer 1

[Amith Kamath]

One of the many ways to do this:

I = imread('http://imageshack.us/a/img401/5148/0mbt.jpg');
J = I == 255; % note that there are many '255' valued pixels near the intersection. 
se = strel('disk',5);
K = imerode(J,se); % remove some of the unwanted noise pixels.
[x y] = find(K) %returns the x,y coordinates of the region in question.

[Naresh Naik]

x 17235x1 double min 1 and max 1024

y 17235x1 double min 1 and max 1024

x and y are showing the 17235 horizontal line and 1 vertical line how do i know the intercept point ?

Could you make me clear ?

[Naresh Naik]

Do we write a program such a way that virtual lines can be drawn on both the x and y white line of the above image

(<http://imageshack.us/photo/my-images/401/0mbt.jpg/>)

From that virtual line we can find out the intercept where they cross each other

Answer 2

[deepak gogade]

i want to intersection point of curve by the .fig file

/matlabcentral/answers/uploaded_files/12588/Unti.jpg

 this is my graph fig. i want to intersection point of efficiency & unit discharge at 100 unit speed & other unit speed. so how we use matlab code finding intersection of this.