findHomography, getPerspectiveTransform, & getAffineTransform

Question

This question is on the OpenCV functions findHomography, getPerspectiveTransform & getAffineTransform

1. What is the

Answer 1

getAffineTransform:affine transform is combination of translation, scale, shear, and rotation https://www.mathworks.com/discovery/affine-transformation.html https://www.tutorialspoint.com/computer_graphics/2d_transformation.htm

getPerspectiveTransform：perspective transform is project mapping enter image description here