Hmm, nevermind.  It looks like the x,y coordinates were implicitly reversed in the call to polygon (which takes y coordinates first).  Sorry

rr, cc = polygon(poly[:, 0], poly[:, 1], img.shape)


On Wed, Jan 1, 2014 at 11:40 PM, Adam Hughes <hughesadam87@gmail.com> wrote:
I'm implementing draw.polygon from this example (http://scikit-image.org/docs/dev/auto_examples/plot_shapes.html)

I connected the dots to the verticies provided in poly and plotted over the imshow result:

In [105]: plt.imshow(poly)                                                                                                                                            
In [107]: plt.plot(*zip(*poly), ls='--')                                                                                                                              
In [108]: plt.scatter(*zip(*poly))                                                                                                                                    

Which results in the attatched image.  This is unexpected, no?

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