typedef enum _IwiDerivativeType
{
    iwDerivHorFirst = 0,  // Horizontal first derivative
    iwDerivHorSecond,     // Horizontal second derivative
    iwDerivVerFirst,      // Vertical first derivative
    iwDerivVerSecond,     // Vertical second derivative
    iwDerivNVerFirst      // Negative vertical first derivative
} IwiDerivativeType;

typedef enum _IwiMorphologyType
{
    iwiMorphErode  = 0, // Erode morphology operation
    iwiMorphDilate,     // Dilate morphology operation
    iwiMorphOpen,       // Open morphology operation
    iwiMorphClose,      // Close morphology operation
    iwiMorphTophat,     // Tophat morphology operation
    iwiMorphBlackhat,   // Blackhat morphology operation
    iwiMorphGradient    // Gradient morphology operation
} IwiMorphologyType;