Hi there,

I had a quick idea to try looking at a local balance at each point, because the ones you're looking for have more white surrounding pixels than black ones. It's not perfect and requires to hand-tune threshold, but seems working. Screenshot with code is attached.
image.png

On Wed, May 8, 2019 at 11:59 AM Jean-Patrick Pommier <jeanpatrick.pommier@gmail.com> wrote:
Hello,
I had a similar problem:
contour02.png
I tried to resolve the problem this way using polygonal approximation. The result will depend on the scale of resolution I guess.

Jean-Patrick

Le mer. 8 mai 2019 à 10:37, Stefanie Lück <luecks@gmail.com> a écrit :
Hi everybody,

I am working on a computer vision problem but I got stuck. I am trying to detect outer points of an binary image (see attached images, points which i need are labeled in red on image points.png).

I have tried different approaches (edges, maximas, corner detection) but usually the inner corners will be detected because the outer points I need are rather round.

Any idea of an algorithm which might be useful for this problem?

Thanks a lot in advance,
Stefanie






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