Thread Subject:

cartesian coordinates from a matrix

Hello,
I have an image which represents a black&white handmade signature. I tranformed this image into a matrix, with this command:

A = imread('myImage.bmp');
A = not(img); /*I do this because I need the symbol "1" when there's a point of the signature and "0" when there isn't. */

So my matrix A has only 0 and 1 as symbols...
I need to find the cartesian coordinates of the matrix's points in which there is the symbol "1" and split them into 2 vectors, X and Y.

For example if my matrix is:
0 1 0 0
1 0 0 0
0 0 0 0
I need two vector like these:
X = [1; 2]
Y = [2; 3]
because there is a symbol 1 in position (1,2) and there's a symbol 1 in position (2,3). I hope it's clear
Can you help me, please?

From your example it seems that X =[1 2] and Y=[2 1].
you can get this by using "find" function.

parag2489@gmail.com wrote in message <20cb842f-2294-45a6-ad95-886ca0311800@googlegroups.com>...
> From your example it seems that X =[1 2] and Y=[2 1].
> you can get this by using "find" function.

Yes it was exactly what I was searching for! Thank you very much!
By the way, for my example:
[ r, c ] = find(matrix)
return this:
r =

     2
     1


c =

     1
     2
but it's just a different order ;)