getAffineTransform() : calculates an affine transform from three pairs of the corresponding points.
estimateRigidTransform() : computes an optimal affine transformation between two 2D point sets.
getPerspectiveTransform() : calculates a perspective transform from four pairs of the corresponding points.
findHomography() : finds a perspective transformation between two planes.
warpAffine() : applies an affine transformation to an image.
warpPerspective() : applies a perspective transformation to an image.
perspectiveTransform() : performs the perspective matrix transformation of vectors.
transform() : performs the matrix transformation of every array element.