_center_and_normalize_points(points)
The points are transformed in a two-step procedure that is expressed as a transformation matrix. The matrix of the resulting points is usually better conditioned than the matrix of the original points.
Center the image points, such that the new coordinate system has its origin at the centroid of the image points.
Normalize the image points, such that the mean distance from the points to the origin of the coordinate system is sqrt(2).
The coordinates of the image points.
The transformation matrix to obtain the new points.
The transformed image points.
Center and normalize image points.
The following pages refer to to this document either explicitly or contain code examples using this.
skimage.segmentation.morphsnakes.disk_level_set
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