`skimage.morphology._max_tree:_max_tree`

Signature

   def     _max_tree (    image    ,    mask    ,    structure    ,    offset    ,    shape    ,    parent    ,    sorted_indices      )

Build a max-tree.

image : array: The flattened image pixels.
mask : array of int: An array of the same shape as image where each pixel contains a nonzero value if it is to be considered for the filtering. NOTE: it is essential that the border pixels (those with neighbors falling outside the volume) are all set to zero, or segfaults could occur.
structure : array of int: A list of coordinate offsets to compute the raveled coordinates of each neighbor from the raveled coordinates of the current pixel.
parent : array of int: Output image of the same shape as the input image. The value at each pixel is the parent index of this pixel in the max-tree reprentation. This array will be written to in-place.
sorted_indices : array of int: Output "list" of pixel indices, which contains an ordering of elements in the tree such that a parent of a pixel always comes before the element itself. More formally: i < j implies that j cannot be the the parent of i. This array will be written to in-place.