Radial Structure and Horizon-Like Feature Detection¶
This pass reconstructs radial profiles from the approved observer ladder debug images and computes first and second derivatives to detect radius-localized structure.
| Checkpoint | apparent_radius_px | feature_radius_px | gradient_sign_change_radius_px | peak_count | inflection_count | feature_minus_apparent_px | slope_steepness_near_apparent |
|---|---|---|---|---|---|---|---|
mouth |
206.24 | 202.00 | 202.00 | 9 | 67 | -4.24 | 0.0168 |
mouth_to_throat_approach |
204.92 | 193.00 | 205.00 | 7 | 50 | -11.92 | 0.0163 |
throat |
202.28 | 252.00 | 194.00 | 6 | 59 | 49.72 | 0.0251 |
post_throat_backstep_01 |
206.24 | 213.00 | 203.00 | 10 | 54 | 6.76 | 0.0149 |
post_throat_exit_approach |
200.96 | 227.00 | 193.00 | 9 | 56 | 26.04 | 0.0140 |
exit_lookback |
203.60 | 144.00 | 214.00 | 5 | 64 | -59.60 | 0.0117 |
Interpretation¶
- Consistent feature-radius verdict:
mixed. - Throat sharpening verdict:
yes. - The detected feature radius is defined as the nearest local peak to the apparent radius, with a gradient sign-change fallback when no nearby peak is present.
- The derivative structure remains bounded across checkpoints, but the bridge and far-side checkpoints shift the detected feature away from a simple single-ring interpretation.
Figures:
