一、仿射变换

1、仿射变换矩阵

hom_mat2d_identity — Generate the homogeneous transformation matrix of the identical 2D transformation.

hom_mat2d_rotate — Add a rotation to a homogeneous 2D transformation matrix.
hom_mat2d_translate — Add a translation to a homogeneous 2D transformation matrix.

vector_angle_to_rigid — Compute a rigid affine transformation from points and angles.

2、图像、ROI和XLD仿射变换

affine_trans_contour_xld — Apply an arbitrary affine 2D transformation to XLD contours.
affine_trans_image — Apply an arbitrary affine 2D transformation to images.
affine_trans_region — Apply an arbitrary affine 2D transformation to regions.