Updates the motion history image as following: mhi(x,y)=timestamp if silhouette(x,y)!=0 0 if silhouette(x,y)=0 and mhi(x,y)<timestamp-duration mhi(x,y) otherwise That is, MHI pixels where motion occurs are set to the current timestamp, while the pixels where motion happened far ago are cleared.

public static void cvUpdateMotionHistory(
	IntPtr silhouette,
	IntPtr mhi,
	double timestamp,
	double duration
)

Public Shared Sub cvUpdateMotionHistory ( _
	silhouette As IntPtr, _
	mhi As IntPtr, _
	timestamp As Double, _
	duration As Double _
)

public:
static void cvUpdateMotionHistory(
	IntPtr silhouette, 
	IntPtr mhi, 
	double timestamp, 
	double duration
)