plane op• Data kinds: none → table (an op determined by its arguments alone — it takes no image or data input)
• Call: import fullseye as fs; fs.ledger.gen_radial_distortion_map(cam_par, kappa, shape) (to call the implementation directly, import calib; calib.gen_radial_distortion_map(cam_par, kappa, shape); from the registry, opscalib.get("gen_radial_distortion_map"))
• HALCON equivalent: gen_radial_distortion_map (the HALCON reference is a useful guide to its meaning and parameters)
• GPU: none (CPU reference implementation only)
Builds the inverse map (row_map, col_map) of a radial distortion (gen_radial_distortion_map).
Output pixel (row, col) → input coordinate. The model is a first-order polynomial: for the pixel offset (x, y) from the principal point, r^2 = x^2 + y^2, input = principal point + (x, y) * (1 + kappa r^2) (kappa in 1/pixel²; the fx/fy of cam_par are not used). ★It is not the exact inverse of the division model (mvimage.distort_division / undistort_division, u = d / (1 + kappa |d|^2)) but its first-order approximation. Using the same kappa in both disagrees silently:
at 640x480 with the principal point (320, 240), up to 4.28 px for kappa = -5e-7 and up to 46.73 px for -2e-6 (measured 2026-11-09). For exact removal of division-model distortion use mvimage.change_radial_distortion_image (kappa of cam_out set to 0).
• camera_calibration family guide
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• The canonical algorithm (author, year) and its uses are named in the family usage guide above.
• (none yet)
table as input)image_points_to_world_plane · contour_to_world_plane_xld · sim_caltab · disp_caltab · calibration_error_map · calibration_uncertainty_map · calibration_next_pose
plane)image_to_world_plane · image_points_to_world_plane · contour_to_world_plane_xld · gen_image_to_world_plane_map
*Provenance: calib.py — CALIB operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.