skimage2.measure.grid_points_in_poly#

skimage2.measure.grid_points_in_poly(shape, verts, binarize=True)[source]#

Test whether points on a specified grid are inside a polygon.

For each (r, c) coordinate on a grid, i.e. (0, 0), (0, 1) etc., test whether that point lies inside a polygon.

You can control the output type with the binarize flag. Please refer to its documentation for further details.

Parameters:

shapetuple (M, N): Shape of the grid.
verts(V, 2) array: Specify the V vertices of the polygon, sorted either clockwise or anti-clockwise. The first point may (but does not need to be) duplicated.
binarizebool: If True, the output of the function is a boolean mask. Otherwise, it is a labeled array. The labels are: 0 - outside, 1 - inside, 2 - vertex, 3 - edge.

Returns:

maskndarray of shape (M, N): If binarize is True, the output is a boolean mask. True means the corresponding pixel falls inside the polygon. If binarize is False, the output is a labeled array, with pixels having a label between 0 and 3. The meaning of the values is: 0 - outside, 1 - inside, 2 - vertex, 3 - edge.