Apply an arbitrary affine transformation to an XLD contour.

::affine_trans_contour_xld applies an arbitrary affine transformation, i.e., scaling, rotation, translation, and skewing, to an XLD contour. The affine map is described by the transformation matrix given in HomMat2D , which is built up by using ::hom_mat2d_identity, ::hom_mat2d_scale, ::hom_mat2d_rotate, and ::hom_mat2d_translate. The components of the homogeneous transformation matrix are interpreted as follows: the row coordinate of the image corresponds to the x coordinate of the matrix, while the column coordinate of the image corresponds to the y coordinate of the matrix. This is necessary to obtain a right-handed coordinate system, which is assumed for the homogeneous transformation matrices, also for the image. In particular, by doing so roatations are performed in the correct direction. Note that the (x,y) order of the matrices quite naturally corresponds to the usual (row,column) order for coordinates in the image.

The components of the homogeneous transformation matrix are interpreted as follows: the row coordinate of the image corresponds to the x coordinate of the matrix, while the column coordinate of the image corresponds to the y coordinate of the matrix. This is necessary to obtain a right-handed coordinate system, which is assumed for the homogeneous transformation matrices, also for the image. In particular, by doing so roatations are performed in the correct direction. Note that the (x,y) order of the matrices quite naturally corresponds to the usual (row,column) order for coordinates in the image.

::affine_trans_contour_xld returns H_MSG_TRUE if all parameter values are correct. If necessary, an exception is raised.

::hom_mat2d_identity, ::hom_mat2d_translate, ::hom_mat2d_rotate, ::hom_mat2d_scale

::affine_trans_image, ::affine_trans_region

Sub-pixel operators