3D multi-plane hologram · amplitude L2 baseline

DragonBunny RGB-D → 9-plane focal stack → one shared set of 8 binary-amplitude FLCOS holograms. Plane 0 is the far-focus end and plane 8 is the near-focus end.

9focal planes
8time-multiplexed frames
28.12 dBmean linear PSNR
0.440mean sRGB SSIM

Source RGB-D

Input RGB
Input depth map

Interactive focal-plane inspection

The error heatmap uses one shared 99.5-percentile scale across all planes.

Plane 4 · 120.89 mm
Target focal image
Hard-binarized L2 reconstruction
Absolute linear-intensity error

Does the reconstruction change focus?

|Target plane 8 − plane 0|
|Reconstruction plane 8 − plane 0|, same scale

Bright regions are where appearance changes as focus moves from the far plane to the near plane. This distinguishes genuine depth/focus behavior from a nearly identical noisy image repeated at every plane.

Metrics by focal plane

PlaneDistance (mm)Amplitude RMSE ↓Linear PSNR ↑sRGB SSIM ↑
0114.460.0575827.650.4164
1116.290.0560427.960.4274
2117.960.0555528.050.4368
3119.480.0553728.060.4445
4120.890.0550228.160.4484
5122.180.0543428.270.4496
6123.380.0535128.390.4482
7124.500.0532428.410.4458
8125.540.0538728.170.4403

Mean amplitude RMSE: 0.05495. These are diagnostic 2D-per-plane metrics, not a validated 3D perceptual score.

All planes

Plane 0114.46 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0576 · PSNR 27.65 dB · SSIM 0.416
Plane 1116.29 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0560 · PSNR 27.96 dB · SSIM 0.427
Plane 2117.96 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0556 · PSNR 28.05 dB · SSIM 0.437
Plane 3119.48 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0554 · PSNR 28.06 dB · SSIM 0.444
Plane 4120.89 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0550 · PSNR 28.16 dB · SSIM 0.448
Plane 5122.18 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0543 · PSNR 28.27 dB · SSIM 0.450
Plane 6123.38 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0535 · PSNR 28.39 dB · SSIM 0.448
Plane 7124.50 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0532 · PSNR 28.41 dB · SSIM 0.446
Plane 8125.54 mm
Target focal image
Hard L2 reconstruction
Linear-intensity error
amp RMSE 0.0539 · PSNR 28.17 dB · SSIM 0.440

Exact pilot setting

Configuration and caveats
{
  "scene": "DragonBunny RGB-D",
  "loss": "Amplitude L2 (single scalar across RGB, depth planes, and pixels; channels optimized separately)",
  "frames": 8,
  "planes": 9,
  "iterations": 300,
  "lr": 0.005,
  "quantization": "Gumbel {0,1} binary amplitude / deterministic hard reconstruction",
  "slm": "native binary-amplitude FLCOS, 1200\u00d71920; ROI 900\u00d71600",
  "physical_iris": true,
  "best_training_loss_per_channel": [
    0.0008136293618008494,
    0.0020729515235871077,
    0.002850181423127651
  ],
  "run_root": "/auto/homes/fy277/ph_opt_runs/3d_l2_baseline_20260806_105417"
}

Important: this first pilot uses the repository's existing SDR focal-stack generator and global stack normalization. It is not yet the absolute-nits HDR loader. The three RGB channels were optimized separately, matching the repository's original 3D execution pattern.