[nodes] imageProcessing: output format option

Allows you to choose the output format (RGBA, RGB, Grayscale)

meshroom/nodes/aliceVision/ImageProcessing.py

@@ -237,6 +237,16 @@ Convert or apply filtering to the input images.
                 uid=[0],
             ),
         ]),
+        desc.ChoiceParam(
+                name='outputFormat',
+                label='Output Image Format',
+                description='Allows you to choose the format of the output image.',
+                value='rgba',
+                values=['rgba', 'rgb', 'grayscale'],
+                exclusive=True,
+                advanced=True,
+                uid=[0],
+            ),
         desc.ChoiceParam(
             name='verboseLevel',
             label='Verbose Level',