MATLAB: Receiving x and y coordinates of an image.

Question

Using the code:

"I = imread('pic.png');

[m, n, p] = size (I);

x = 1: n;

y = 1: m;

[x, y] = meshgrid (x, y);"

I was able to plot this image onto MATLAB.

However, now I am unable to retrieve all of the x and y coordinates. I need to have all of the x and y coordinates in order to later use it in a different code, where i use Fourier Transform and Epicycles in order to trace this image.

Can somebdy please help me to retrieve all of the x and y coordinates for the traced image.

Many thanks

Answer 1

I = imread("image.jpeg") ; 
[y,x] = find(I~=255) ; 
coor = [x  y] ;