Cv2Rodrigues Method (InputArray, OutputArray, OutputArray) OpenCvSharp Class Library
converts rotation vector to rotation matrix or vice versa using Rodrigues transformation

Namespace:  OpenCvSharp.CPlusPlus
Assembly:  OpenCvSharp.CPlusPlus (in OpenCvSharp.CPlusPlus.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax

public static void Rodrigues(
	InputArray src,
	OutputArray dst,
	OutputArray jacobian = null
)

Parameters

src
Type: OpenCvSharp.CPlusPlusInputArray
Input rotation vector (3x1 or 1x3) or rotation matrix (3x3).
dst
Type: OpenCvSharp.CPlusPlusOutputArray
Output rotation matrix (3x3) or rotation vector (3x1 or 1x3), respectively.
jacobian (Optional)
Type: OpenCvSharp.CPlusPlusOutputArray
Optional output Jacobian matrix, 3x9 or 9x3, which is a matrix of partial derivatives of the output array components with respect to the input array components.
See Also

Reference