[HDR Nodes and Panorama Pipelines]

Add working color space as input parameter in Sampling, Calibration and Merging HDR nodes. (unused in calibration, but useful to transfer from sampling to merging in pipelines)
Update rawColorInterpretation default value and add some comments in cameraInit.

meshroom/nodes/aliceVision/LdrToHdrMerge.py

@@ -105,6 +105,16 @@ class LdrToHdrMerge(desc.AVCommandLineNode):
             advanced=True,
             enabled= lambda node: node.byPass.enabled and not node.byPass.value,
         ),
+        desc.ChoiceParam(
+            name='workingColorSpace',
+            label='Working Color Space',
+            description='Allows you to choose the color space in which the data are processed.',
+            value='sRGB',
+            values=['sRGB', 'Linear', 'ACES2065-1', 'ACEScg'],
+            exclusive=True,
+            uid=[0],
+            enabled= lambda node: node.byPass.enabled and not node.byPass.value,
+        ),
         desc.BoolParam(
             name='enableHighlight',
             label='Enable Highlight',