Set colour correction to interpolate value

Update hardware test readme

Add pause between calibrating camera and setting background

src/openflexure_microscope_server/things/camera/picamera.py

@@ -772,10 +772,11 @@ class StreamingPiCamera2(BaseCamera):
         This is broken out into its own property for convenience and compatibility with
         the micromanager API
 
-        Ir is a 9 value tuple used to specify the 3x3 matrix that the GPU pipeline uses
+        It is a 9 value tuple used to specify the 3x3 matrix that the GPU pipeline uses
         to convert from the camera R,G,B vector to the standard R,G,B.
 
-        See page Raspberry Pi Camera Algorithm and Tuning Guide, page 45.
+        The value here is interpolated from the IMX219 defaults for the colour temperatures
+        above and below our LED temperature of 5000K.
         """
         return tuple(tf_utils.get_static_ccm(self.tuning)[0]["ccm"])
 
@@ -799,15 +800,15 @@ class StreamingPiCamera2(BaseCamera):
         """
         # This is flattened 3x3 matrix. See `colour_correction_matrix`
         col_corr_matrix = [
-            1.80439,
-            -0.73699,
-            -0.06739,
-            -0.36073,
-            1.83327,
-            -0.47255,
-            -0.08378,
-            -0.56403,
-            1.64781,
+            2.222935,
+            -0.759672,
+            -0.463262,
+            -0.683489,
+            2.711882,
+            -1.028399,
+            -0.261375,
+            -0.668016,
+            1.929391,
         ]
         self.colour_correction_matrix = col_corr_matrix
 
@@ -858,6 +859,7 @@ class StreamingPiCamera2(BaseCamera):
         self.calibrate_lens_shading()
         self.reset_ccm()
         self.calibrate_white_balance()
+        time.sleep(0.5)
         self.set_background(portal)
 
     @lt.thing_action

src/openflexure_microscope_server/things/camera/picamera_tuning_file_utils.py

@@ -64,7 +64,7 @@ def set_static_ccm(
     adaptive tweaking by the algorithm.
     """
     ccm = Picamera2.find_tuning_algo(tuning, "rpi.ccm")
-    ccm["ccms"] = [{"ct": 2860, "ccm": col_corr_matrix}]
+    ccm["ccms"] = [{"ct": 5000, "ccm": col_corr_matrix}]
 
 
 def get_static_ccm(tuning: dict) -> None: