KernelA

inline void HSI2RGB(double h, double s, double i, double* r, double* g, double* b)
{
	double x = i * (1 - s);
	
	// For black, white and grayscale h is NaN. Conversion works incorrectly.
	if(std::isnan(h))
	{
	  *r = i;
	  *g = i;
	  *b = i;