cyjcyj91/Hypersim-Distractor

Hypersim synthetic training data

This repository distributes data only. Training code and configuration are maintained in GARD-DFrecon. The latest data inventory is the October 13 release; the September 20K snapshot is historical.

Dataset settings

Setting / extracted folder	Meaning	Train pairs	Eval pairs	Total pairs
transient_only/	Original clean scene paired with transient distractors	42,006	1,057	43,063
transient_static/pairs/	Clean scene containing inserted static A, paired with additional transient B	35,928	728	36,656
real_nvs/	Real unpaired data for NVS supervision	—	—	Not uploaded

Counts are paired camera images, not multiview groups. transient_only contains the previous 20,965 pairs plus 22,098 additional pairs. The previous snapshot's scenes_v2 6,823 pairs are already part of the 20,965, never an extra dataset. Collection names (scenes_v2, scenes_002, etc.) are generation folders, not the three training settings.

transient_static includes generation added in collections 1–6 and 7. Static A is present in both paired images; masks label transient B. Standalone static clean resources are provided under transient_static/clean_resources/ and are not additional paired samples.

Download

Install huggingface_hub and requests, then download the small extraction script:

hf download cyjcyj91/Hypersim-Distractor \
  releases/20261013_full_synthetic_v4_n3_m1/download_and_extract.py \
  --repo-type dataset --local-dir ./hf_metadata
python ./hf_metadata/releases/20261013_full_synthetic_v4_n3_m1/download_and_extract.py \
  --destination /data/hypersim_synthetic_full

The script resolves one immutable commit for the entire download, verifies archive SHA256, safely extracts one archive at a time, removes staging TARs, and supports resume. It creates:

hypersim_synthetic_full/
  transient_only/<collection>/<scene>/<camera>/frame.XXXX/
  transient_static/
    pairs/<collection>/<scene>/<camera>/group_XXXXXX/variant_00/
    clean_resources/<collection>/<scene>/<camera>/group_XXXXXX/variant_00/
  camera_reference/
  manifests/
    transient_only.json
    transient_static.json
    scene_split_policy.json

real_nvs/ is reserved for future real data and is not created or populated by this release. Existing legacy extraction roots are moved to the new layout before resume; conflicting old/new roots cause an explicit error. Files originally downloaded from the old release may still include its old documentation or training directory; those are not used by the new instructions.

Inventory, splits and snapshots

The inventory is frozen at approximately 2026-10-13 19:34 KST. Later synthesis is excluded, including subsequently generated scenes_008 negative samples. Six standalone scenes_008 static groups completed before the cutoff are included as clean resources.

Seven scenes remain held out: ai_001_001, ai_001_006, ai_001_007, ai_001_008, ai_001_009, ai_001_010, ai_003_006. Manifests contain relative sample directories and within-split candidate indices. For V=4, N=3, M=1, 41,900 transient-only training anchors have at least three eligible other views; each transient+static variant provides four views. M RGB is teacher supervision, not an input image.

Archive blobs retain their historical names and internal paths to avoid copying hundreds of GB. The downloader maps them into the layout above. archive_index.json identifies all 401 required archives, including reused September archives; reused files are not counted twice. Versioned summary.json is authoritative for current counts. Root manifest.jsonl and September receipts describe only the historical snapshot and must not be interpreted as the expanded inventory.

The older September snapshot contains 20,965 pairs (20,885 train, 80 eval), 165 archives, 42.22 GB decimal. Its original snapshot remains accessible at revision a935b4e251faeaf1e96723a28463d44e8913c834. The legacy scenes generation is excluded to avoid duplicate versions of _001 data.

Review LICENSE_NOTES.md and attribution/objaverse_assets.json for Hypersim and individual Objaverse attribution. Pair files include clean/distractor RGB, object/shadow masks and provenance metadata. Camera references are supplied for NVS rays. Absolute producer paths in provenance are informational.