title: skewing or shearing an image in python
body: <p>I need to shear and skew some images using python.
  I've come across <a href="http://scikit-image.org/docs/dev/api/skimage.transform.html#skimage.transform.AffineTransform" rel="noreferrer">this skimage module</a> but I don't seem able to understand exactly how I'm supposed to use this.</p>
  
  <p>I've tried a few things, which obviously gave me errors, because as I suddenly realized later, I'm not passing in my image to the function. I then noticed that the function doesn't take my image as an input parameter in the first place. So how should the transformation be applied? Or is this even the right function to be looking at in order to skew or shear an image?</p>