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CvInvokeFindHomography Method (IInputArray, IInputArray, IOutputArray, HomographyMethod, Double, IOutputArray)
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Finds perspective transformation H=||hij|| between the source and the destination planes

Namespace: Emgu.CV
Assembly: Emgu.CV.World (in Emgu.CV.World.dll) Version: 3.1.0.2282 (3.1.0.2282)
Syntax
public static void FindHomography(
	IInputArray srcPoints,
	IInputArray dstPoints,
	IOutputArray homography,
	HomographyMethod method = HomographyMethod.Default,
	double ransacReprojThreshold = 3,
	IOutputArray mask = null
)

Parameters

srcPoints
Type: Emgu.CVIInputArray
Point coordinates in the original plane, 2xN, Nx2, 3xN or Nx3 array (the latter two are for representation in homogeneous coordinates), where N is the number of points.
dstPoints
Type: Emgu.CVIInputArray
Point coordinates in the destination plane, 2xN, Nx2, 3xN or Nx3 array (the latter two are for representation in homogeneous coordinates)
homography
Type: Emgu.CVIOutputArray
Output 3x3 homography matrix. Homography matrix is determined up to a scale, thus it is normalized to make h33=1
method (Optional)
Type: Emgu.CV.CvEnumHomographyMethod
The type of the method
ransacReprojThreshold (Optional)
Type: SystemDouble
The maximum allowed re-projection 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
mask (Optional)
Type: Emgu.CVIOutputArray
The optional output mask set by a robust method (RANSAC or LMEDS).
See Also