pedroodb/glosl-gsl

GloSL — Greek Sign Language Dataset (GSL)

Part of GloSL, a set of continuous sign language translation corpora in one format.

• Sign language: Greek Sign Language (gss)
• Spoken language: Greek (el)
• Domain: public-service dialogues (health, police, KEP), lab recordings
• Samples: 10,290 (11.51 h) — splits {'train': 8274, 'dev': 1008, 'test': 1008}
• Split policy: glosl-splits-v1, glosl — GloSL-defined (sentence_disjoint): Sentence-disjoint for translation: all performances of a sentence fall in the same split, stratified by scenario. The official signer-independent split repeats the same 331 sentences in every split (99% of test sentences in train), so it measures recognition; it is kept in splits/original.csv. (see card.json and diagnostics/)
• License: CC BY 4.0 (Zenodo: zenodo.org/records/3941811) — public; source: https://vcl.iti.gr/dataset/gsl/
• Cite: Adaloglou et al., A Comprehensive Study on SLR Methods, IEEE TMM 2021

Files

annotations.csv, card.json, poses/<NNNN>/<id>.pose, videos/<NNNN>/<id>.mp4 (same frames as the pose). card.json holds the full provenance.

annotations.csv columns (same in every GloSL dataset; empty when not applicable): id, split, text, gloss, gloss_type, signer, start, end, fps, n_frames, video_ref, pose_file, video_file.

Poses

mediapipe-holistic, 543 points (POSE_LANDMARKS 33, FACE_LANDMARKS 468, LEFT_HAND_LANDMARKS 21, RIGHT_HAND_LANDMARKS 21), 3D. Coordinates: pixels of the frame the pose refers to (header width x height, depth 0); z raw. Confidence: body = MediaPipe visibility (1.0 where the source shipped none); face/hands 1 when detected; missing point = (0,0,0) with confidence 0. Frame rate: native, per file (also in annotations.csv). Normalization (glosl-norm-v1) is applied at load time, not stored. Note: reused from slt_datasets MediaPipe-Holistic .npy (KB/12); normalization applied at LOAD time (KB/05)