Emgu CV Library Documentation
FindHomography Method (srcPoints, dstPoints, ransacReprojThreshold)
NamespacesEmgu.CVCameraCalibrationFindHomography(Matrix<(Of <(Single>)>), Matrix<(Of <(Single>)>), Double)

www.emgu.com/wiki
Use RANDSAC to finds perspective transformation H=||h_ij|| between the source and the destination planes
Declaration Syntax
C#Visual BasicVisual C++
public static Matrix<double> FindHomography(
	Matrix<float> srcPoints,
	Matrix<float> dstPoints,
	double ransacReprojThreshold
)
Public Shared Function FindHomography ( _
	srcPoints As Matrix(Of Single), _
	dstPoints As Matrix(Of Single), _
	ransacReprojThreshold As Double _
) As Matrix(Of Double)
public:
static Matrix<double>^ FindHomography(
	Matrix<float>^ srcPoints, 
	Matrix<float>^ dstPoints, 
	double ransacReprojThreshold
)
Parameters
srcPoints (Matrix<(Of <(Single>)>))
Point coordinates in the original plane, 2xN, Nx2, 3xN or Nx3 array (the latter two are for representation in homogenious coordinates), where N is the number of points
dstPoints (Matrix<(Of <(Single>)>))
Point coordinates in the destination plane, 2xN, Nx2, 3xN or Nx3 array (the latter two are for representation in homogenious coordinates)
ransacReprojThreshold (Double)
The maximum allowed reprojection error to treat a point pair as an inlier. The parameter is only used in RANSAC-based homography estimation. E.g. if dst_points coordinates are measured in pixels with pixel-accurate precision, it makes sense to set this parameter somewhere in the range ~1..3
Return Value
The 3x3 homography matrix.

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)