__init__(self,
n=250,
selector='bins',
bin_size=50)
(Constructor)
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n - is the approximate number of points requested. bin_size -
the width and height of each bin in pixels. selector - ('all', 'bins', or
'best') stratagy for point selection.
When corner_selector is set to bins, the image is subdivided in to
bins of size <bin_size>X<bin_size> pixels and an equal number
of points will be taken from each of those bins. This insures that
points are found in all parts of the image not just where the corners are
strongest.
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