| --- |
| pretty_name: V2-SAM EgoExo FullTrain image closure |
| language: |
| - en |
| task_categories: |
| - image-segmentation |
| tags: |
| - ego-exo4d |
| - ego2exo |
| - exo2ego |
| - research-artifact |
| license: other |
| --- |
| |
| # V2-SAM Ego2Exo/Exo2Ego FullTrain image closure |
|
|
| Research repack for the V2-SAM Ego2Exo and Exo2Ego training |
| pipelines. It contains the two FullTrain annotations and exactly the JPEG |
| union referenced by them. |
|
|
| This card documents packaging integrity; it does not grant additional rights |
| to the source data. Users remain responsible for complying with the |
| underlying Ego-Exo4D terms and any redistribution requirements. |
|
|
| ## Why this repack exists |
|
|
| The earlier local `Ego-Exo4D-Relation-Train-Mini` extraction was not a proven |
| closure of both training directions. Auditing the union of the two FullTrain |
| JSON files found 6,431 referenced paths missing before repair. Training with |
| that snapshot could fail late, silently omit samples in ad-hoc loaders, or |
| make Ego2Exo and Exo2Ego experiments use different image coverage. |
|
|
| This repack fixes the data artifact rather than changing annotations: |
|
|
| - both official FullTrain JSONs are included unchanged; |
| - referenced image paths are de-duplicated across both directions; |
| - every referenced JPEG is present in the final image root; |
| - every final JPEG passed the image-readability check; |
| - files are split into independent standard tar archives; |
| - file counts, byte sizes, SHA256 hashes, and repair provenance are retained. |
|
|
| ## Verified closure |
|
|
| | Item | Verified value | |
| | --- | ---: | |
| | Ego2Exo records | 110,118 | |
| | Ego2Exo unique referenced images | 220,236 | |
| | Exo2Ego records | 123,381 | |
| | Exo2Ego unique referenced images | 246,762 | |
| | Union referenced JPEGs | 249,642 | |
| | Missing before repair | 6,431 | |
| | Missing after repair | 0 | |
| | Unreadable JPEGs after repair | 0 | |
| | Episode groups | 754 | |
| | Tar shards | 4 | |
|
|
| The two annotation files retain these identities: |
|
|
| | File | SHA256 | |
| | --- | --- | |
| | `Ego2Exo_FullTrain.json` | `bb83cac92179b21833d2465ce29d5b0cf81668d8443d569279313c891472175a` | |
| | `Exo2Ego_FullTrain.json` | `212e7291990453b087f91dd848dd8a8a8f11a7a0a110fb257be760ca9c8c3058` | |
|
|
| `provenance/final_closure.json` is the authoritative closure report. |
| `provenance/repair_receipt.json` records the repair audit. Its |
| `already_present_count=6431` means the final repair rerun found all previously |
| missing paths already restored; it is not a claim that no repair had been |
| needed. |
|
|
| ## Repository layout |
|
|
| ```text |
| . |
| ├── MANIFEST.json |
| ├── SHA256SUMS |
| ├── README.md |
| ├── data/ |
| │ ├── data_segswap-00000.tar |
| │ ├── data_segswap-00001.tar |
| │ ├── data_segswap-00002.tar |
| │ └── data_segswap-00003.tar |
| ├── json/Ego-Exo4D-Seg/frame-level/ |
| │ ├── Ego2Exo_FullTrain.json |
| │ └── Exo2Ego_FullTrain.json |
| └── provenance/ |
| ├── final_closure.json |
| └── repair_receipt.json |
| ``` |
|
|
| Each `data/*.tar` is independently readable. Extract all four into the same |
| destination so their path trees merge. |
|
|
| ## Download, verify, and extract |
|
|
| Authenticate with an account that can read this private dataset: |
|
|
| ```bash |
| hf download Travor278/V2SAM-EgoExo-Train-Mini-Complete \ |
| --repo-type dataset \ |
| --local-dir V2SAM-EgoExo-Train-Mini-Complete |
| |
| cd V2SAM-EgoExo-Train-Mini-Complete |
| sha256sum -c SHA256SUMS |
| |
| mkdir -p extracted |
| for shard in data/data_segswap-*.tar; do |
| tar -xf "$shard" -C extracted |
| done |
| ``` |
|
|
| Point the V2-SAM dataset `sam2_folder` at the extracted image tree and select |
| the matching JSON for the desired direction: |
|
|
| - Ego2Exo: `json/Ego-Exo4D-Seg/frame-level/Ego2Exo_FullTrain.json` |
| - Exo2Ego: `json/Ego-Exo4D-Seg/frame-level/Exo2Ego_FullTrain.json` |
|
|
| Do not concatenate the JSONs unless the training code explicitly implements a |
| mixed-direction dataset contract. |
|
|
| ## Integrity files |
|
|
| - `MANIFEST.json`: shard counts, sizes, hashes, JSON identities, and closure |
| report identities. |
| - `SHA256SUMS`: command-line integrity verification for every payload and |
| metadata file in this repository. |
| - `provenance/final_closure.json`: before/after missing counts and JPEG audit. |
| - `provenance/repair_receipt.json`: source archive and repair-run evidence. |
|
|
| The repository is complete only when all SHA256 checks pass and the closure |
| report has `ready=true`, `post_repair_missing_count=0`, and |
| `post_repair_bad_jpeg_count=0`. |
|
|
