Create README.md

README.md

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+---
+license: cc-by-sa-4.0
+pretty_name: ZDPShift
+tags:
+  - stereo-matching
+  - disparity
+  - negative-disparity
+  - ZDP
+  - blender
+  - open-movies
+task_categories:
+  - depth-estimation
+size_categories:
+  - 10K<n<100K
+---
+
+# ZDPShift: Beyond the Zero-Disparity Plane in Stereo
+
+<p align="center">
+  <img src="images/teaser.png" alt="Same scene rendered at five ZDP shifts; anaglyph + GT disparity + error map" width="100%"/>
+</p>
+
+Every public stereo benchmark assumes positive disparity values`d = fB/Z ≥ 0`. Mordern stereoscopic display — cinema 3D, VR, HMDs — actively uses `d < 0`. ZDPShift bridges the gap: the same artist-authored open-movie content rendered at **five ZDP shifts** Δ ∈ {−16, 0, +16, +24, +32} pixels, giving you a controlled continuum from textbook-positive to substantially-crossed disparities, with analytical ground truth at every pixel.
+
+## News:
+- [1st July] A technical report is on the way!
+
+## The problem in one plot
+
+<p align="center">
+  <img src="images/sota_failure.png" alt="EPE of public SOTA stereo models vs ZDP shift" width="80%"/>
+</p>
+
+Every public SOTA fails by **19–60×** the instant disparity crosses zero. ZDPShift gives you the data to fix that.
+
+## What you get
+
+| Split | Source | Scenes | Frames | Pairs | Size |
+|---|---|---:|---:|---:|---:|
+| `train/` | 6 Blender open movies | 30 | 4,134 | 20,670 | 318 GB |
+| `test/` | Caminandes Llamigos | 4 | 271 | 1,355 | 35 GB |
+
+Per pair: **left.png** + **right.png** (1920×1280 open-movie) + **disparity.npy** (signed float32) + **meta.json** (Δ, focal, baseline, K_L, K_R, % crossed).
+
+## Gallery
+
+<p align="center">
+  <img src="images/gallery.png" alt="ZDPShift scene gallery across the 8 source franchises" width="100%"/>
+</p>
+
+## Geometry
+
+```
+d(Z, Δ) = f · B / Z − Δ                    baseline B = 0.10 m,   Δ ∈ {−16, 0, +16, +24, +32} px
+```
+
+Cameras stay physically parallel — only the principal points shift by ∓Δ/2. Multi-Δ self-consistency `d(Δᵢ) − d(Δⱼ) = Δⱼ − Δᵢ` holds to a median 0.04 px residual (sub-pixel Cycles noise).
+
+```
+rendered_datasets/<split>/<scene>/frame_<N>_<cam>/shift_{-16,+0,+16,+24,+32}/
+                                                      ├── left.png
+                                                      ├── right.png
+                                                      ├── disparity.npy
+                                                      └── meta.json
+```
+
+## Render protocol
+
+To keep ground truth well-defined at every pixel, three artist settings are overridden:
+
+- **Aperture forced to f/64** — defocus blur kept below sub-pixel
+- **Motion blur off** — fast objects have crisp per-frame correspondences
+- **Compositor bypassed** — no grading / bloom / flare distortion after correspondence
+
+Everything else (lighting, materials, scene composition, camera path, focal length per shot) is inherited from the original `.blend` unchanged. Cycles 32 spp + OPTIX denoising; sampler noise floor ≈ 0.005/255 per pixel.
+
+## License
+
+**CC-BY-SA-4.0**, inherited from the Blender Studio open movies. Redistribute and adapt with attribution and share-alike.