Emgu CV Library Documentation
MotionHistory Constructor (bufferCount, diffThresh, mhiDuration, maxTimeDelta, minTimeDelta)
NamespacesEmgu.CVMotionHistoryMotionHistory(Int32, Int32, Double, Double, Double)

www.emgu.com/wiki
Create a motion history object
Declaration Syntax
C#Visual BasicVisual C++
public MotionHistory(
	int bufferCount,
	int diffThresh,
	double mhiDuration,
	double maxTimeDelta,
	double minTimeDelta
)
Public Sub New ( _
	bufferCount As Integer, _
	diffThresh As Integer, _
	mhiDuration As Double, _
	maxTimeDelta As Double, _
	minTimeDelta As Double _
)
public:
MotionHistory(
	int bufferCount, 
	int diffThresh, 
	double mhiDuration, 
	double maxTimeDelta, 
	double minTimeDelta
)
Parameters
bufferCount (Int32)
number of images to store in buffer, adjust it to fit your camera's frame rate
diffThresh (Int32)
0-255, the amount of pixel intensity change to consider it as motion pixel
mhiDuration (Double)
In second, the duration of motion history your wants to keep
maxTimeDelta (Double)
In second, parameter for cvCalcMotionGradient
minTimeDelta (Double)
In second, parameter for cvCalcMotionGradient

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.3.0.0 (1.3.0.0)