| { |
| "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": "Diattenuation-related target modality." |
| }, |
| "Delta": { |
| "range": [0, 1], |
| "description": "Depolarization-related target modality." |
| }, |
| "eta": { |
| "range": [0, "pi"], |
| "description": "Retardance-related target modality." |
| }, |
| "theta": { |
| "range": ["-pi/2", "pi/2"], |
| "description": "Orientation-related target modality." |
| }, |
| "psi": { |
| "range": ["-pi/2", "pi/2"], |
| "description": "Orientation-related target modality." |
| }, |
| "R": { |
| "range": [0, "pi"], |
| "description": "Retardance-related target modality." |
| } |
| }, |
| "normalization": { |
| "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." |
| }, |
| "grayscale_to_physical_mapping": { |
| "applies_to_target_encoding": "png_uint8_normalized_to_float32_0_1", |
| "channel_order": ["D", "Delta", "eta", "theta", "psi", "R"], |
| "formula": { |
| "D": "D_gray", |
| "Delta": "Delta_gray", |
| "eta": "pi * eta_gray", |
| "theta": "pi * (theta_gray - 0.5)", |
| "psi": "pi * (psi_gray - 0.5)", |
| "R": "pi * R_gray" |
| }, |
| "warning": "Apply this mapping only to normalized grayscale target tensors. Do not apply it to target tensors that are already stored in physical units." |
| } |
| } |
|
|
