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Add example to circle_perimeter drawing function

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Johannes Schönberger
2013-05-27 21:15:36 +02:00
parent 3c8337a3ac
commit 5bae2046df
1 changed files with 21 additions and 3 deletions
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skimage/draw/_draw.pyx
+21 -3
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@@ -181,7 +181,6 @@ def circle_perimeter(Py_ssize_t cy, Py_ssize_t cx, Py_ssize_t radius,
bresenham : Bresenham method
andres : Andres method
Returns
-------
rr, cc : (N,) ndarray of int
@@ -199,8 +198,27 @@ def circle_perimeter(Py_ssize_t cy, Py_ssize_t cx, Py_ssize_t radius,
References
----------
.. [1] J.E. Bresenham, "Algorithm for computer control of a digital
plotter", 4 (1965) 25-30.
.. [2] E. Andres, "Discrete circles, rings and spheres", 18 (1994) 695-706.
plotter", 4 (1965) 25-30.
.. [2] E. Andres, "Discrete circles, rings and spheres",
18 (1994) 695-706.
Examples
--------
>>> from skimage.draw import circle_perimeter
>>> img = np.zeros((10, 10), dtype=np.uint8)
>>> rr, cc = circle_perimeter(4, 4, 3)
>>> img[rr, cc] = 1
>>> img
array([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 1, 1, 1, 0, 0, 0, 0],
[0, 0, 1, 0, 0, 0, 1, 0, 0, 0],
[0, 1, 0, 0, 0, 0, 0, 1, 0, 0],
[0, 1, 0, 0, 0, 0, 0, 1, 0, 0],
[0, 1, 0, 0, 0, 0, 0, 1, 0, 0],
[0, 0, 1, 0, 0, 0, 1, 0, 0, 0],
[0, 0, 0, 1, 1, 1, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], dtype=uint8)
"""