Use another method for halftomo-external sinogram generation

nabu/preproc/sinogram.py

@@ -194,6 +194,21 @@ def convert_halftomo(sino, rotation_axis_position):
 
 
 def _convert_halftomo_right(sino, rotation_axis_position):
+    """
+    Converts a sinogram into a sinogram with extended FOV with the "half tomography"
+    setting, with a CoR outside the image support.
+    """
+    assert sino.ndim == 2
+    na, nx = sino.shape
+    assert (na % 2) == 0
+    assert rotation_axis_position > nx
+
+    sino2 = np.pad(sino, ((0, 0), (0, rotation_axis_position - nx)), mode="reflect")
+    return convert_halftomo(sino2, rotation_axis_position)
+
+
+
+def _convert_halftomo_right_old(sino, rotation_axis_position):
     """
     Converts a sinogram into a sinogram with extended FOV with the "half tomography"
     setting, with a CoR outside the image support.