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  2. README.md +332 -0
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+ *.7z filter=lfs diff=lfs merge=lfs -text
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+ *.arrow filter=lfs diff=lfs merge=lfs -text
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+ *.avro filter=lfs diff=lfs merge=lfs -text
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+ *.bin filter=lfs diff=lfs merge=lfs -text
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+ *.bz2 filter=lfs diff=lfs merge=lfs -text
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+ *.ckpt filter=lfs diff=lfs merge=lfs -text
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+ *.ftz filter=lfs diff=lfs merge=lfs -text
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+ *.gz filter=lfs diff=lfs merge=lfs -text
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+ *.h5 filter=lfs diff=lfs merge=lfs -text
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+ *.joblib filter=lfs diff=lfs merge=lfs -text
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+ *.lfs.* filter=lfs diff=lfs merge=lfs -text
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+ *.lz4 filter=lfs diff=lfs merge=lfs -text
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+ *.mds filter=lfs diff=lfs merge=lfs -text
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+ *.mlmodel filter=lfs diff=lfs merge=lfs -text
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+ *.model filter=lfs diff=lfs merge=lfs -text
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+ *.msgpack filter=lfs diff=lfs merge=lfs -text
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+ *.npy filter=lfs diff=lfs merge=lfs -text
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+ *.npz filter=lfs diff=lfs merge=lfs -text
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+ *.onnx filter=lfs diff=lfs merge=lfs -text
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+ *.ot filter=lfs diff=lfs merge=lfs -text
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+ *.parquet filter=lfs diff=lfs merge=lfs -text
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+ *.pb filter=lfs diff=lfs merge=lfs -text
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+ *.pickle filter=lfs diff=lfs merge=lfs -text
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+ *.pkl filter=lfs diff=lfs merge=lfs -text
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+ *.pt filter=lfs diff=lfs merge=lfs -text
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+ *.pth filter=lfs diff=lfs merge=lfs -text
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+ *.rar filter=lfs diff=lfs merge=lfs -text
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+ *.safetensors filter=lfs diff=lfs merge=lfs -text
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+ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
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+ *.tar.* filter=lfs diff=lfs merge=lfs -text
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+ *.tar filter=lfs diff=lfs merge=lfs -text
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+ *.tflite filter=lfs diff=lfs merge=lfs -text
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+ *.tgz filter=lfs diff=lfs merge=lfs -text
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+ *.wasm filter=lfs diff=lfs merge=lfs -text
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+ *.xz filter=lfs diff=lfs merge=lfs -text
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+ *.zip filter=lfs diff=lfs merge=lfs -text
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+ *.zst filter=lfs diff=lfs merge=lfs -text
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+ *tfevents* filter=lfs diff=lfs merge=lfs -text
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+ # Audio files - uncompressed
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+ *.pcm filter=lfs diff=lfs merge=lfs -text
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+ *.sam filter=lfs diff=lfs merge=lfs -text
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+ *.raw filter=lfs diff=lfs merge=lfs -text
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+ # Audio files - compressed
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+ *.aac filter=lfs diff=lfs merge=lfs -text
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+ *.flac filter=lfs diff=lfs merge=lfs -text
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+ *.mp3 filter=lfs diff=lfs merge=lfs -text
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+ *.ogg filter=lfs diff=lfs merge=lfs -text
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+ *.wav filter=lfs diff=lfs merge=lfs -text
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+ # Image files - uncompressed
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+ *.bmp filter=lfs diff=lfs merge=lfs -text
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+ *.gif filter=lfs diff=lfs merge=lfs -text
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+ *.png filter=lfs diff=lfs merge=lfs -text
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+ *.tiff filter=lfs diff=lfs merge=lfs -text
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+ # Image files - compressed
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+ *.jpg filter=lfs diff=lfs merge=lfs -text
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+ *.jpeg filter=lfs diff=lfs merge=lfs -text
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+ *.webp filter=lfs diff=lfs merge=lfs -text
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+ # Video files - compressed
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+ *.mp4 filter=lfs diff=lfs merge=lfs -text
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+ *.webm filter=lfs diff=lfs merge=lfs -text
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+ ---
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+ license: cc0-1.0
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+ pretty_name: Dancing Chibi Figures
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+ language:
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+ - en
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+ task_categories:
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+ - text-to-video
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+ - text-to-image
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+ - image-to-video
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+ - keypoint-detection
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+ - image-segmentation
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+ tags:
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+ - synthetic
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+ - video-diffusion
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+ - motion
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+ - chibi
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+ - character-animation
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+ - sprite
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+ - benchmark
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+ - toy-dataset
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+ size_categories:
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+ - 100K<n<1M
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+ dataset_info:
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+ - config_name: frames
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+ features:
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+ - name: sample_id
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+ dtype: string
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+ - name: color
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+ dtype: image
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+ - name: prompt
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+ dtype: string
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+ - name: caption_short
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+ dtype: string
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+ - name: group
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+ dtype: string
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+ - name: split
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+ dtype: string
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+ - name: frame_idx
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+ dtype: int32
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+ - name: clip_id
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+ dtype: string
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+ - name: seg
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+ dtype: image
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+ - name: depth
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+ dtype: image
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+ - name: normal
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+ dtype: image
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+ - name: caption
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+ dtype: string
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+ - name: caption_static
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+ dtype: string
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+ - name: caption_dynamic
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+ dtype: string
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+ - name: caption_dense
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+ dtype: string
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+ - name: events
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+ dtype: string
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+ - name: n_frames
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+ dtype: int32
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+ - name: fps
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+ dtype: int32
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+ - name: held_out
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+ dtype: bool
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+ - name: text
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+ dtype: string
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+ - name: seed
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+ dtype: int32
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+ - name: qa_flags
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+ dtype: string
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+ - name: cam_yaw
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+ dtype: float32
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+ - name: cam_pitch
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+ dtype: float32
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+ - name: cam_center_x
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+ dtype: float32
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+ - name: cam_center_y
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+ dtype: float32
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+ - name: px_per_m
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+ dtype: float32
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+ - name: joint_xyz
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+ dtype: binary
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+ - name: joint_xy
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+ dtype: binary
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+ - name: joint_depth
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+ dtype: binary
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+ - name: joint_visible
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+ dtype: binary
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+ - name: root_pos
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+ dtype: binary
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+ - name: root_vel
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+ dtype: binary
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+ - name: root_heading
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+ dtype: binary
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+ - name: foot_contacts
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+ dtype: binary
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+ - name: config
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+ dtype: string
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+ - name: size
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+ dtype: int32
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+ - config_name: mini
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+ features:
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+ - name: sample_id
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+ dtype: string
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+ - name: color
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+ dtype: image
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+ - name: prompt
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+ dtype: string
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+ - name: caption_short
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+ dtype: string
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+ - name: group
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+ dtype: string
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+ - name: split
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+ dtype: string
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+ - name: frame_idx
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+ dtype: int32
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+ - name: clip_id
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+ dtype: string
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+ - name: seg
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+ dtype: image
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+ - name: depth
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+ dtype: image
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+ - name: normal
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+ dtype: image
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+ - name: caption
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+ dtype: string
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+ - name: caption_static
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+ dtype: string
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+ - name: caption_dynamic
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+ dtype: string
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+ - name: caption_dense
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+ dtype: string
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+ - name: events
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+ dtype: string
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+ - name: n_frames
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+ dtype: int32
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+ - name: fps
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+ dtype: int32
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+ - name: held_out
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+ dtype: bool
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+ - name: text
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+ dtype: string
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+ - name: seed
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+ dtype: int32
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+ - name: qa_flags
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+ dtype: string
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+ - name: cam_yaw
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+ dtype: float32
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+ - name: cam_pitch
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+ dtype: float32
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+ - name: cam_center_x
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+ dtype: float32
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+ - name: cam_center_y
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+ dtype: float32
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+ - name: px_per_m
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+ dtype: float32
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+ - name: joint_xyz
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+ dtype: binary
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+ - name: joint_xy
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+ dtype: binary
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+ - name: joint_depth
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+ dtype: binary
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+ - name: joint_visible
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+ dtype: binary
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+ - name: root_pos
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+ dtype: binary
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+ - name: root_vel
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+ dtype: binary
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+ - name: root_heading
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+ dtype: binary
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+ - name: foot_contacts
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+ dtype: binary
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+ - name: config
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+ dtype: string
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+ - name: size
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+ dtype: int32
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+ configs:
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+ - config_name: frames
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+ default: true
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+ data_files:
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+ - split: train
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+ path: frames/train-*.parquet
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+ - split: validation
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+ path: frames/val-*.parquet
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+ - split: test
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+ path: frames/test-*.parquet
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+ - config_name: mini
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+ data_files:
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+ - split: train
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+ path: mini/train-*.parquet
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+ - split: validation
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+ path: mini/val-*.parquet
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+ - split: test
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+ path: mini/test-*.parquet
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+ ---
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+ # Dancing Chibi Figures — v0.1
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+
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+ **One template Q-version (chibi) character, animated by 1,430 motion clips, rendered with exact labels and motion-grounded captions — and paired frame-for-frame with [Dancing Stick Figures](https://huggingface.co/datasets/sprited/dancing-stick-figures).**
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+
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+ 1,423 clips · 6 s @ 20 fps · 128×128 RGBA · 514,800 frames · 143 text prompts × 10 seeds × 3 cameras ·
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+ every frame carries the 3D skeleton, camera, depth, camera-space normals, part segmentation, motion events and five
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+ levels of caption.
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+
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+ <p align="center"><img src="figs/contact_sheet.png" width="900"></p>
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+
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+ *One row per motion group; every clip also carries depth, camera-space normals, part segmentation and joints:*
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+
207
+ <p align="center"><img src="figs/labels_row.png" width="1000"></p>
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+
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+ The stick-figure dataset was the minimal case (lines, an exact oracle). This is the next rung: a **real character with
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+ volume** — a grey, flat-shaded chibi mannequin (~2.8 heads tall, face guide cross, dark outline, the kind of template
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+ figure drawing books use) — while every pixel is still a deterministic function of ~30 known parameters. Same motion,
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+ same cameras, same `clip_id` as the stick-figure dataset, so the two can be used together (skeleton → character,
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+ stick render ↔ chibi render, pose estimation on chibi proportions).
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+
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+ > **v0.1 = first public cut.** Rendering, labels and splits are final for this version. Captions are templated from the
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+ > motion labels (see *Captions*) and may be refined in v0.2 without re-rendering.
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+
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+ ## Which config?
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+
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+ | config | rows | size | contents |
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+ |---|---|---|---|
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+ | `frames` (default) | 514,800 frames | 5.1 GB | 128² RGBA colour (WebP lossless) + depth16 + normals + seg + all labels + captions |
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+ | `mini` | 514,800 frames | 2.09 GB | **64²** version of `frames` — laptops, Colab, classrooms |
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+ | motion | — | — | the raw ARDY motion is identical to the stick dataset's `motion` config (same `clip_id`); the chibi retarget is `generator/chibi.py` in the code repo |
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+
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+ ## Quick start
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+
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+ ```python
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+ from datasets import load_dataset
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+ ds = load_dataset("sprited/dancing-chibi-figures", "frames", split="validation")
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+ row = ds[0]
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+ row["color"] # PIL RGBA image, transparent background
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+ row["caption"] # "Seen from the front-right, a chibi mannequin waves hello with the right hand; it raises the right hand to head level at 0.5 s ..."
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+ row["caption_dynamic"] # observed motion only (from the labels, never from the prompt)
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+ row["prompt"] # the text the motion was generated from: "A person waves hello with the right hand."
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+ import json, numpy as np
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+ events = json.loads(row["events"]) # per-clip motion events (same on every row of a clip)
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+ xy = np.frombuffer(row["joint_xy"], np.float32).reshape(27, 2) # normalised [0,1] image coords
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+ seg = np.array(row["seg"]) # bone id per pixel (0 = background)
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+ ```
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+
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+ Composite the RGBA colour over any background you like; depth/normal/seg let you relight or recolour it (the render is
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+ unlit on purpose — the normals are there so you can "afterlight" it).
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+
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+ ## What is in a frame
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+
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+ **`frames` / `mini` — one row per rendered frame.**
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+
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+ | column | type | meaning |
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+ |---|---|---|
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+ | `sample_id`, `clip_id`, `frame_idx`, `n_frames`, `fps` | str/int | `clip_id = group/prompt_slug_s{seed}/c{cam}`; 120 frames per clip, 20 fps; **identical ids to Dancing Stick Figures** |
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+ | `split`, `group`, `held_out` | str/bool | split ∈ train/val/test; group ∈ dance, gesture, locomotion, transitions, idle, acrobatic, **sport** (held out → test only) |
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+ | `prompt` (= `text`) | str | the ARDY motion prompt the clip was generated from (143 unique) — the *intent*, not a description of the clip |
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+ | `events` | JSON str (identical on every row of a clip-camera) | rule-based motion events from the labels: `travel_m`, `travel_dir`, `heading_change_deg`, `jumps` [[t,dur]], `steps`, `left/right_hand_above_head / _raised / _forward`, `left/right_foot_raised`, `low_posture`, `lying`, `inverted`, `hips_height_m`, `activity_per_s`, `active_s` |
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+ | `caption_static` | str | appearance + framing + camera (constant over the clip) |
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+ | `caption_dynamic` | str | the observed motion in temporal order, generated from `events` only |
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+ | `caption_short`, `caption`, `caption_dense` | str | 5–10 words / 1–2 sentences / 3–6 sentences; 2–3 paraphrase templates sampled per clip-camera |
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+ | `seed` | int | ARDY seed 0–9 |
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+ | `qa_flags` | str | comma list; `prompt_mismatch:no_locomotion / no_jump / no_turn / no_low_posture / no_arms_up` (heuristics: the clip contradicts its prompt), `frozen`, `out_of_frame` (a joint centre leaves the image — 0.31 % of frames, almost all in `transitions` clips that start on the floor and stand up; the fixed camera is framed on the frame-0 hips). Kept, not filtered |
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+ | `cam_yaw`, `cam_pitch` | float (rad) | orthographic camera, same sampling and values as the stick dataset; yaw 0 = figure faces the camera; **positive pitch = camera slightly below** the horizontal |
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+ | `cam_center_x/y`, `px_per_m` | float | projection in 128-px units: `x_px = cx + px_per_m·x` (for `mini` divide by 2); scale 50–58 px/m |
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+ | `joint_xyz` | binary f32[27,3] | figure-frame 3D joints (x left, y up, z forward), metres, Hips at frame 0 = origin |
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+ | `joint_xy` | binary f32[27,2] | image coordinates, normalised to [0,1] |
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+ | `joint_depth` | binary f32[27] | depth toward the camera (m), Hips-relative, same convention as the depth map |
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+ | `joint_visible` | binary u8[27] | **1 if the bone owns ≥1 pixel in `seg`** — NOT the stick dataset's per-joint occlusion test, despite the same column name; hand-tip and toe bones are absorbed by their neighbours in `seg` and are always 0 (use `joint_xy` for an in-frame test). Will be unified with the stick semantics in v0.2 |
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+ | `root_pos`, `root_vel`, `root_heading` | binary f32[3], f32[3], f32[2] | Hips trajectory in the frame-0 figure frame (world travel — the render itself is hips-centred); heading = (cos, sin) yaw |
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+ | `foot_contacts` | binary u8[4] | ARDY foot contacts: LeftFoot, LeftToe, RightFoot, RightToe |
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+ | `color` | image | 128×128 RGBA WebP (lossless), **transparent background**, unlit flat grey |
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+ | `depth` | image | 16-bit PNG, `depth = lo + u16/65535·(hi−lo)`, range [−1.5, 1.5] m toward the camera around the Hips, 0 = background |
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+ | `normal` | image | RGB WebP (lossless), camera-space normal `n = rgb/255·2−1` (x right, y up, z toward camera) |
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+ | `seg` | image | 8-bit PNG, value = joint id + 1 of the bone owning the pixel (0 = background); exact at render resolution, majority-vote downsampled |
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+ | `config`, `size` | str/int | `frames`/128, `mini`/64 |
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+
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+ **All left/right in prompts, captions, events and joint names are the figure's own left/right (egocentric), not the viewer's** — a figure facing the camera points "to the left" toward screen-right.
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+
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+ Binary columns are raw little-endian arrays: `np.frombuffer(row[col], dtype).reshape(shape)`.
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+ Skeleton (`cskel27`, index order): Hips, Spine, Spine1, Spine2, Spine3, Neck, Head, RightShoulder, RightArm,
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+ RightForeArm, RightHand, RightHandEnd, RightHandThumb1, LeftShoulder, LeftArm, LeftForeArm, LeftHand, LeftHandEnd,
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+ LeftHandThumb1, RightUpLeg, RightLeg, RightFoot, RightToeBase, LeftUpLeg, LeftLeg, LeftFoot, LeftToeBase.
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+ `Head` is the head-sphere **centre** (skull base in the stick dataset).
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+
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+ ## Captions: prompt ≠ caption
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+
284
+ The ARDY prompt is what we *asked for*; the clip is what the motion model *produced*, and they disagree more often than
285
+ you would think ("walks in a circle" turns 62°; "does jumping jacks" jumps twice, then stands). So the captions are
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+ generated **from the labels**, Seedance-style: a static part (appearance, framing, camera), a dynamic part (events in
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+ temporal order), and three granularities, with the prompt kept as a separate `prompt` column and a `prompt_mismatch`
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+ flag when the two clearly contradict. The render is hips-centred, so the captions say "the camera follows the hips"
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+ and never claim visible travel; travel lives in `events` / `root_pos`.
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+
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+ We also ran an off-the-shelf video VLM (Qwen3-VL-8B) on the clips: it described ~half of them correctly (sitting,
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+ waving, kicking) and missed whole-body fast motion (jumps, a flip) and turning on this featureless mannequin — a
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+ useful probe, not a caption source; VLM captions are not included in v0.1.
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+
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+ ## Splits
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+
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+ By **prompt**, never by seed or camera (identical to the stick dataset): `sport` is held out entirely; else hash(prompt) → 90/5/5.
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+
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+ | | frames |
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+ |---|---|
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+ | train | 363,600 |
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+ | validation | 18,000 |
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+ | test (incl. sport) | 133,200 |
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+
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+ ## How it was made
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+
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+ prompt → **NVIDIA ARDY** text-to-motion (6 s, 20 fps, seeds 0–9; the same clips as the stick dataset) → chibi
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+ retarget (same joint rotations on chibi bone lengths; root travel scaled by the leg ratio so the feet do not slide;
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+ ground from foot contacts) → **Blender 5.1** procedural rig (Skin-modifier mannequin over the 27-joint graph + sphere
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+ head, heat weights, dual-quaternion skinning; flat Emission material, inverted-hull outline, face guide cross) → 3
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+ orthographic cameras per clip (same sampling as the stick dataset) → two headless Eevee passes per frame (anti-aliased
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+ colour; 1-sample exact depth / normal / segmentation) at 256², box-downsampled to 128 / 64 → parquet. Deterministic
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+ from `clip_id`; the generator is in the code repo.
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+
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+ ## Intended use / limitations
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+
317
+ Teaching and benchmarking small video/image generative models, conditional generation (skeleton/seg/depth → character),
318
+ pose estimation on chibi proportions, sprite/character animation research. One template character only (no clothes,
319
+ hair, faces, props); hips-centred framing (no visible travel); ~0.3 % of frames are partly out of frame (flagged `out_of_frame`); the rig mesh has small internal defects at the neck and
320
+ wrists invisible at ≤256 px; `prompt_mismatch` flags are heuristics; camera pitch sign follows the stick dataset
321
+ (positive = from slightly below).
322
+
323
+ ## Versioning
324
+
325
+ v0.1 (2026-08) first public cut. Planned v0.2: more prompts (a curated set of ~300 from a chibi pose reference book),
326
+ an anatomy oracle, post-processed outlines, optional colour-coded config, 8-direction sprite views.
327
+
328
+ ## License and attribution
329
+
330
+ Data CC0-1.0. Motion generated with NVIDIA ARDY (NVIDIA Open Model License, which claims no ownership of outputs);
331
+ character, rig and renderer are procedural code (MIT) — no third-party 3D assets. Paired dataset:
332
+ [sprited/dancing-stick-figures](https://huggingface.co/datasets/sprited/dancing-stick-figures).
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