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lerobot/src/lerobot/annotations/steerable_pipeline/prompts/vqa.txt
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Pepijn cec8ee0be6 feat: language annotation pipeline (#3471)
Steerable annotation pipeline (lerobot-annotate) that populates the language_persistent and language_events columns introduced in PR 1 (#3467) directly into data/chunk-*/file-*.parquet.

This is PR 2 of the three-PR plan:

PR 1 (Add extensive language support #3467): schema + DSL + rendering, base of this PR
PR 2 (this PR): annotation pipeline writing into PR 1's columns
PR 3: model with language prediction and runtime
A VLM (Qwen-VL family, served on vLLM) watches each episode's video and emits grounded language annotations: subtasks, plans, memory, task rephrasings, interjections + speech, and per-camera VQA. The pipeline is built for production annotation at scale — single-camera grounding, embedded-frame inputs, a describe-then-segment grounding flow, and a deterministic full-episode coverage guarantee — informed by Scale's dense-captioning findings (representation > sampling, rules > reasoning, model capacity is the biggest lever, two-pass systems compound errors)
2026-06-12 15:12:33 +02:00

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You are generating a frame-grounded visual question/answer pair for
chain-of-thought training. Reference: ECoT (Zawalski 2024) and Steerable
Policies — both train policies on grounded features such as bounding box
pixel coordinates, keypoints, counts, attributes, and spatial relations.
The frame shows a robot working on: "{episode_task}".
Question types and the EXACT answer JSON shape required for each:
bbox => {{"detections": [{{"label": "<obj>", "bbox_format": "xyxy",
"bbox": [x1, y1, x2, y2]}}, ...]}}
bbox is in pixel coordinates (x_min, y_min, x_max, y_max).
ECoT example: "a white cup [124, 25, 176, 113]".
keypoint => {{"label": "<point>", "point_format": "xy",
"point": [x, y]}}
count => {{"label": "<obj>", "count": <int>,
"note": "<optional short note>"}}
attribute => {{"label": "<obj>", "attribute": "<color|shape|state|...>",
"value": "<observed value>"}}
spatial => {{"subject": "<obj>", "relation": "<left_of|right_of|on|in|"
"above|below|near>", "object": "<obj>"}}
Generate a question of type "{question_type}". Output strictly valid JSON:
{{
"question": "<short, frame-grounded question>",
"answer": <object whose shape matches the schema above>
}}