Make Tan&Triggs work as functools

bob/bio/face/preprocessor/TanTriggs.py

@@ -97,8 +97,18 @@ class TanTriggs (Base):
     face : 2D :py:class:`numpy.ndarray`
       The cropped and photometrically enhanced face.
     """
+    if not isinstance(self.cropper, bob.bio.face.preprocessor.FaceCrop):
+        self.cropper = self.cropper()
+    
     image = self.color_channel(image)
     if self.cropper is not None:
       image = self.cropper.crop_face(image, annotations)
+    
+    import numpy
+    if numpy.all(numpy.isnan(self.tan_triggs(image))):
+        import ipdb; ipdb.set_trace()
+        pass
+
     image = self.tan_triggs(image)
+
     return self.data_type(image)