Applies fixed-level thresholding to single-channel array. The function is typically used to get bi-level (binary) image out of grayscale image (cvCmpS could be also used for this purpose) or for removing a noise, i.e. filtering out pixels with too small or too large values. There are several types of thresholding the function supports that are determined by threshold_type

public static double cvThreshold(
	IntPtr src,
	IntPtr dst,
	double threshold,
	double maxValue,
	THRESH thresholdType
)

Public Shared Function cvThreshold ( _
	src As IntPtr, _
	dst As IntPtr, _
	threshold As Double, _
	maxValue As Double, _
	thresholdType As THRESH _
) As Double

public:
static double cvThreshold(
	IntPtr src, 
	IntPtr dst, 
	double threshold, 
	double maxValue, 
	THRESH thresholdType
)