Add bit_depth_image

src/nxmx/__init__.py

@@ -843,6 +843,13 @@ def bit_depth_readout(self) -> int | None:
             return int(self._handle["bit_depth_readout"][()])
         return None
 
+    @cached_property
+    def bit_depth_image(self) -> int | None:
+        """The number of bits per pixel saved to the image data."""
+        if "bit_depth_image" in self._handle:
+            return int(self._handle["bit_depth_image"][()])
+        return None
+
     @cached_property
     def sensor_material(self) -> str:
         """The name of the material a detector sensor is constructed from.

tests/conftest.py

@@ -60,6 +60,7 @@ def nxmx_example():
         detector["frame_time"] = 0.1
         detector["frame_time"].attrs["units"] = "s"
         detector["bit_depth_readout"] = np.array(32)
+        detector["bit_depth_image"] = np.array(32)
 
         detector_transformations = detector.create_group("transformations")
         detector_transformations.attrs["NX_class"] = "NXtransformations"

tests/test_nxmx.py

@@ -92,6 +92,7 @@ def test_nxmx(nxmx_example):
         detector.depends_on.path == "/entry/instrument/detector/transformations/det_z"
     )
     assert detector.bit_depth_readout == 32
+    assert detector.bit_depth_image == 32
     assert detector.beam_center_x == pint.Quantity(2079.79727597266, "pixel")
     assert detector.beam_center_y == pint.Quantity(2225.38773853771, "pixel")