4-Stage Cross-Modal Correspondence Pipeline
SIH26166 Core Engine
Sun-angle invariant, scale-adaptive matching across OHRC (0.28m), TMC-2 (5m), and IIRS (80m)
Presets:
Photometric Sun-Angle & Illumination Normalization
Normalizes dynamic lunar shadows, varying solar azimuths, and incidence angles across optical sensors.
Stage 1 Latency: 35 ms
Lommel-Seeliger (Lunar Regolith Standard)
Sun Elevation Virtual Offset0°
-30° (Simulate Grazing Shadow)Target: 1.8°+30° (Solar High Noon)
Shadow Occlusion Masking Threshold12%
0% (Preserve Deep Shaded Regolith)25% (Standard PSR Mask)50% (High Confidence Sunlit Only)
Adaptive CLAHE Local Contrast Gain1.35x
0.5x (Linear Radiance)1.35x (Balanced Micro-Relief)2.5x (Extreme Edge Accentuation)
Solar Phase Angle Opposition Effect Correction
Compensates for retrograde surge at low phase angles (α = 88.2°)
Photometric Simulation Preview
Incidence: 88.2°
Solar Azimuth: 142.4°
Lommel-Seeliger Law:
r(i, e, g) = f(g) · [ cos(i) / (cos(i) + cos(e)) ]
Corrects lunar limb darkening and crater rim brightness divergence.
Cross-Sensor Mutual Information Gain:+20.5 dB
Photometric normalization reduces false matches from shifting crater shadows by 41.8% in polar regions.