code: def correct(self, img):
          '''
          ...from perspective distortion:
           --> perspective transformation
           --> apply tilt factor (view factor) correction 
          '''
          print("CORRECT PERSPECTIVE ...")
          self.img = imread(img)
  
          if not self._homography_is_fixed:
              self._homography = None
          h = self.homography
  
          if self.opts['do_correctIntensity']:
              tf = self.tiltFactor()
              self.img = np.asfarray(self.img)
              if self.img.ndim == 3:
                  for col in range(self.img.shape[2]):
                      self.img[..., col] /= tf
              else:
                  self.img = self.img / tf
          warped = cv2.warpPerspective(self.img,
                                       h,
                                       self._newBorders[::-1],
                                       flags=cv2.INTER_LANCZOS4,
                                       **self.opts['cv2_opts'])
          return warpef correct(self, img):
          '''
          ...from perspective distortion:
           --> perspective transformation
           --> apply tilt factor (view factor) correction 
          '''
          print("CORRECT PERSPECTIVE ...")
          self.img = imread(img)
  
          if not self._homography_is_fixed:
              self._homography = None
          h = self.homography
  
          if self.opts['do_correctIntensity']:
              tf = self.tiltFactor()
              self.img = np.asfarray(self.img)
              if self.img.ndim == 3:
                  for col in range(self.img.shape[2]):
                      self.img[..., col] /= tf
              else:
                  self.img = self.img / tf
          warped = cv2.warpPerspective(self.img,
                                       h,
                                       self._newBorders[::-1],
                                       flags=cv2.INTER_LANCZOS4,
                                       **self.opts['cv2_opts'])
          return warped
docs: ...from perspective distortion:
           --> perspective transformation
           --> apply tilt factor (view factor) correction