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an example of applying the canny edge detector from the 80s still state-of-the-art we know how the results usually look like we can get good edges for objects that are box-like or polygonal and somewhat less good result for smooth shades and for textured object but actually what what I want to tell you about is not about applying edge detection to natural images but to some different kinds of images like this one what you see here is an electric magnetic stirrer and electron microscopy image of the lattice the vegetable and what you can see are the white stripes here are photosynthetic membranes of the lattice and we got this data from Professor Steve Reich from white man and what they wanted to us to do is to separate the the membranes and find them the boundaries they wanted to use them in tomographic if three-dimensional slices to recover the 3-dimensional structure of this membrane now these pictures I hope you can see the swirling on the screen is of course very noisy and the edge
