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Fitting an Ellipse to a Blob

Visitor

Fitting an Ellipse to a Blob

All --

Please see attached. I believe that my fitting method is correct with regards to orientation, but not size. I am missing some scaling somewhere so the plotted ellipse, blob, and calculated semi-axes all provide different areas. What am I missing?

Apologies in advance for not embedding the image, but it's small.

Thanks.

Matt