Principally, this is a follow-up-question to a problem from a few weeks ago, even though this is about
the algorithm in general without application to my actual problem.
The algorithm basically searches through all lines in
the picture, starting from
the top left of it, until it finds a pixel that is a border. In pseudo-C++:
int start = 0;
for(int i=0; i<amount_of_pixels; ++i)
{
if(pixels[i] == border)
{
start = i;
break;
}
}
When it finds one, it starts
the marching squares algorithm and finds
the contour to whatever object
the pixel belongs to.
Let's say I have something like this:
Where everything except
the color white is a border.
And have found
the contour points of
the first blob:
For
the general algorithm it's over. It found a contour and has done its job. How can I move on to
the other two blobs to find their contours as well?
