'**SUMMARY**
Return the aspect ratio of the feature, which for our purposes
is max(width,height)/min(width,height).
**RETURNS**
A single floating point value of the aspect ration.
**EXAMPLE**
>>> img = Image("OWS.jpg")
>>> blobs = img.findBlobs(128)
>>> b[0].aspectRatio()'

def aspectRatio(self):

    self._updateExtents()
    return self.mAspectRatio
