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ObjectLightness : SoAutoThresholdingProcessing , SoTopHatProcessing , SoHExtremaWatershedProcessing
OffsetMode : SoBinaryCorrelationProcessing2d , SoGrayscaleCorrelationProcessing2d
OpenMode : SoRasterImageRW
OperandRGBA : SoTextureCombiner
Operation : SoBoolOperation
OperationMode : SoIterativeMorphoLutProcessing2d , SoIterativeMorphoLutProcessing3d
Orientation : PoCurveFilling , PoBar , SoVectorizeAction , SoTextOrientationElement , SoTextProperty , SliceScaleBar
Origin : SoArray
OutMapType : SoSupervisedTextureClassificationProcessing3d , SoSupervisedTextureClassificationProcessing2d
OutputMode : SoMarkerBasedWatershedProcessing
OutputSelection : SoTensorVotingProcessing2d , SoEigenDecompositionProcessing2d , SoEigenDecompositionProcessing3d
OutputType : SoGaussianBlurFilterProcessing
OverMethod : SoVolumeData