title: ImportError: DLL load failed while importing _rolling_ball_cy:
body: <p>I am a newbie to Python and working on a small opencv application.
  I need local_threshold from scikit-image but getting below error :</p>
  <blockquote>
  <p>Traceback (most recent call last):   File
  &quot;D:/Projects/Python/Document_Scanner/main.py&quot;, line 6, in 
  from skimage.filters import threshold_local   File &quot;C:\Users\nash2\AppData\Local\Programs\Python\Python38-32\lib\site-packages\skimage\filters_<em>init</em>_.py&quot;,
  line 4, in 
  from .edges import (sobel, sobel_h, sobel_v,   File &quot;C:\Users\nash2\AppData\Local\Programs\Python\Python38-32\lib\site-packages\skimage\filters\edges.py&quot;,
  line 18, in 
  from ..restoration.uft import laplacian   File &quot;C:\Users\nash2\AppData\Local\Programs\Python\Python38-32\lib\site-packages\skimage\restoration_<em>init</em>_.py&quot;,
  line 13, in 
  from .rolling_ball import rolling_ball, ball_kernel, ellipsoid_kernel   File
  &quot;C:\Users\nash2\AppData\Local\Programs\Python\Python38-32\lib\site-packages\skimage\restoration\rolling_ball.py&quot;,
  line 3, in 
  from ._rolling_ball_cy import apply_kernel, apply_kernel_nan ImportError: DLL load failed while importing _rolling_ball_cy: The
  specified module could not be found.</p>
  </blockquote>
  <p>I tried reverting to older version of scikit-image , but still getting error.
  My current version of scikit-image is 0.18.0</p>