Emgu CV Library Documentation
cvAbsDiff Method (src1, src2, dst)
NamespacesEmgu.CVCvInvokecvAbsDiff(IntPtr, IntPtr, IntPtr)

www.emgu.com/wiki
Calculates absolute difference between two arrays. dst(I)c = abs(src1(I)c - src2(I)c). All the arrays must have the same data type and the same size (or ROI size)
Declaration Syntax
C#Visual BasicVisual C++
public static void cvAbsDiff(
	IntPtr src1,
	IntPtr src2,
	IntPtr dst
)
Public Shared Sub cvAbsDiff ( _
	src1 As IntPtr, _
	src2 As IntPtr, _
	dst As IntPtr _
)
public:
static void cvAbsDiff(
	IntPtr src1, 
	IntPtr src2, 
	IntPtr dst
)
Parameters
src1 (IntPtr)
The first source array
src2 (IntPtr)
The second source array
dst (IntPtr)
The destination array

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