How i get x y values of start point and end point of a white curve from image

How i get x y values of start point and end point of a white curve from image image is added .... plz help me...

Answer 1

[KSSV]

I = imread('5.png') ;
I = rgb2gray(I) ;

[y,x] = find(I) ;

figure

imshow(I)
hold on
plot(x,y,'.r')
plot(x(1),y(1),'*y')
plot(x(end),y(end),'*y')

[Sajid Rahim]

thank you sir

[Sajid Rahim]

Sir how i convert the 5.png image to like 555.png... i.e to draw 2 lines...... one frome start point and one line from end point.... plzz..