Public
Ptychography — Public Tier
(5 scenes)Full-access development tier with all data visible.
What you get
Measurements (y), ideal forward operator (H), spec ranges, ground truth (x_true), and true mismatch spec.
How to use
Load HDF5 → compare reconstruction vs x_true → check consistency → iterate.
What to submit
Reconstructed signals (x_hat) and corrected spec as HDF5.
Parameter Specifications
✓
True spec visible — use these exact values for Scenario III oracle reconstruction.
| Parameter | Spec Range | True Value | Unit |
|---|---|---|---|
| probe_error | -5.0 – 10.0 | 2.5 | % |
| position_error | -10.0 – 20.0 | 5.0 | nm |
| partial_coherence | -5.0 – 10.0 | 2.5 | nm |
InverseNet Baseline Scores
Method: CPU_baseline — Mismatch parameter: nominal
Scenario I (Ideal)
7.15 dB
SSIM 0.4195
Scenario II (Mismatch)
8.74 dB
SSIM 0.6343
Scenario III (Oracle)
2.11 dB
SSIM 0.0191
Per-scene breakdown (4 scenes)
| Scene | PSNR I | SSIM I | PSNR II | SSIM II | PSNR III | SSIM III |
|---|---|---|---|---|---|---|
| scene_00 | 10.66 | 0.5537 | 8.05 | 0.5494 | 3.68 | 0.0192 |
| scene_01 | 8.28 | 0.5839 | 7.32 | 0.4150 | 1.97 | 0.0202 |
| scene_02 | 4.88 | 0.0605 | 9.53 | 0.8318 | 1.14 | 0.0113 |
| scene_03 | 4.78 | 0.4799 | 10.06 | 0.7411 | 1.65 | 0.0258 |
Public Tier Leaderboard
| # | Method | Score | PSNR | SSIM | Consistency | Trust | Source |
|---|---|---|---|---|---|---|---|
| 1 | AutoPhaseNN + gradient | 0.770 | 31.95 | 0.942 | 0.87 | ✓ Certified | Chan et al., Commun. Phys. 2024 |
| 2 | PtychoNN + gradient | 0.745 | 29.87 | 0.915 | 0.9 | ✓ Certified | Cherukara et al., Appl. Phys. Lett. 2020 |
| 3 | sDR + gradient | 0.700 | 26.92 | 0.856 | 0.94 | ✓ Certified | Wen et al., J. Opt. 2019 |
| 4 | ePIE + gradient | 0.590 | 22.61 | 0.715 | 0.89 | ✓ Certified | Maiden & Rodenburg, Ultramicroscopy 2009 |
Visible Data Fields
y
H_ideal
spec_ranges
x_true
true_spec
Dataset
Format: HDF5
Scenes: 5
Scoring Formula
0.4 × PSNR_norm + 0.4 × SSIM + 0.2 × (1 − ‖y − Ĥx̂‖/‖y‖)
PSNR: 40%
SSIM: 40%
Consistency: 20%