get coordination of a plotted graph.

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Ibrahim Thorig 2014-3-14

Dear guys;

Below image is generated using this code;

I=bc;
corners = detectHarrisFeatures(I);
[features, valid_corners] = extractFeatures(I, corners);
plot(valid_corners);

someone please guide me how to get the coordination of these points, else using Douglas_peuker algorithm how can i generate support points.

any assist will be appreciated.

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