Apply a projective transformation to a region.
projective_trans_region applies the projective transformation specified by the homogeneous matrix HomMat2D on the regions in Regions and returns the transformed regions in TransRegions.
For creation and interpretation details of this matrix see also projective_trans_image.
If 'clip_region' is set to its default value 'true' by set_system('clip_region', 'true') or if the transformation is degenerated and thus produces infinite regions, the output region is clipped by the rectangle with upper left corner (0, 0) and lower right corner ('width', 'height'), where 'width' and 'height' are system variables (see also get_system). If 'clip_region' is 'false', the output region is not clipped except by the maximum supported coordinate size MAX_FORMAT. This may result in extremely memory and time intensive computations, so use with care.
|
Regions (input_object) |
region(-array) -> object |
| Input regions. | |
|
TransRegions (output_object) |
region(-array) -> object |
| Output regions. | |
|
HomMat2D (input_control) |
hom_mat2d-array -> real |
| Homogeneous projective transformation matrix. | |
|
Interpolation (input_control) |
string -> string |
| Interpolation method for the transformation. | |
| Default value: 'bilinear' | |
| List of values: 'nearest_neighbor', 'bilinear' | |
projective_trans_region is reentrant and automatically parallelized (on tuple level).
vector_to_proj_hom_mat2d, hom_vector_to_proj_hom_mat2d, proj_match_points_ransac, hom_mat3d_project
projective_trans_image, projective_trans_image_size, projective_trans_contour_xld, projective_trans_point_2d, projective_trans_pixel
Foundation
