Add Mueller matrix normalization guidance: metadata/parameter_ranges.json

metadata/parameter_ranges.json

@@ -1,33 +1,40 @@
 {
-  "units": "TODO: physical_units_or_normalized",
+  "units": "mixed_measured_and_normalized_values",
+  "mueller_matrix": {
+    "nominal_range": [-1, 1],
+    "stored_values": "measured_or_processed_float32_values_not_forcibly_clipped",
+    "note": "Real measured Mueller matrix elements may slightly exceed the nominal [-1, 1] range because of acquisition noise, calibration differences, numerical processing, or normalization error. Users should inspect distributions and apply task-appropriate clipping, standardization, or normalization before training."
+  },
   "parameters": {
     "D": {
       "range": [0, 1],
-      "description": "TODO"
+      "description": "Diattenuation-related target modality."
     },
     "Delta": {
       "range": [0, 1],
-      "description": "TODO"
+      "description": "Depolarization-related target modality."
     },
     "eta": {
       "range": [0, "pi"],
-      "description": "TODO"
+      "description": "Retardance-related target modality."
     },
     "theta": {
       "range": ["-pi/2", "pi/2"],
-      "description": "TODO"
+      "description": "Orientation-related target modality."
     },
     "psi": {
       "range": ["-pi/2", "pi/2"],
-      "description": "TODO"
+      "description": "Orientation-related target modality."
     },
     "R": {
       "range": [0, "pi"],
-      "description": "TODO"
+      "description": "Retardance-related target modality."
     }
   },
   "normalization": {
-    "applied": "TODO",
-    "inverse_transform": "TODO"
+    "mueller": "not_forcibly_clipped_to_nominal_range",
+    "waveplate_targets": "stored_from_source_npy_as_float32",
+    "spectral_targets": "converted_from_grayscale_png_uint8_to_float32_divided_by_255",
+    "recommendation": "Use training-set statistics or physically motivated clipping/normalization according to the downstream protocol."
   }
 }