[hdf5scan] Add ALIGNMENT ImageKey

tomoscan/esrf/hdf5scan.py

@@ -46,8 +46,9 @@ _logger = logging.getLogger(__name__)
 
 
 class ImageKey(_Enum):
-    PROJECTION = 0,
-    FLAT_FIELD = 1,
+    ALIGNMENT = -1
+    PROJECTION = 0
+    FLAT_FIELD = 1
     DARK_FIELD = 2
     INVALID = 3
 
@@ -555,7 +556,7 @@ class HDF5TomoScan(TomoScanBase):
                 frame = Frame(index=i_frame, url=url, image_key=img_key,
                               rotation_angle=rot_a)
                 if self.image_key_control is not None:
-                    is_control_frame = self.image_key_control[frame.index]
+                    is_control_frame = (self.image_key_control[frame.index] == ImageKey.ALIGNMENT.value)
                 else:
                     return_already_reach, delta_angle = is_return(lframe=frame,
                                                                   llast_proj_frame=last_proj_frame,