baterflyrity baterflyrity

baterflyrity / direct_inverse_cv2_transforms.py

Created February 20, 2021 17:54

Example of direct and inverse transformations with cv2 perspective. See https://docs.opencv.org/3.1.0/d1/de0/tutorial_py_feature_homography.html

	def transform_coordinates(x: np.float32, y: np.float32, matrix: np.ndarray) -> np.ndarray:
	"""
	Calculate coordinates transformation.
	:param x: x coordinate.
	:param y: y coordinate.
	:param matrix: transformation matrix. Can be obtained from cv2.findHomography().
	:return: transformed coordinates.
	"""
	return cv2.perspectiveTransform(np.array([[[x, y]]], dtype=np.float32), matrix).reshape(2)