RUNTIME ERROR - No module named 'cv2'

[brunoaduarte]

[hsnaf]

which model are u running ? and on what platform are u running ur model .....

[makseq]

Reinstall LS from scratch or try pip install -r requirements.txt

[zbyte]

i have same error with official docker image

[makseq]

@zbyte could you please share logs from docker?

[zbyte]

Container version: 1.18.0

{"asctime": "05/Jun/2025:14:23:34 +0000", "name": "data_export.api", "funcName": "get", "lineno": 195, "levelname": "DEBUG", "user_id": null, "message": "Serialize tasks for export", "taskName": null, "request_id": null}
{"asctime": "05/Jun/2025:14:23:34 +0000", "name": "data_export.api", "funcName": "get", "lineno": 204, "levelname": "DEBUG", "user_id": null, "message": "Prepare export files", "taskName": null, "request_id": null}
{"asctime": "05/Jun/2025:14:23:35 +0000", "name": "core.utils.common", "funcName": "custom_exception_handler", "lineno": 98, "levelname": "ERROR", "user_id": null, "message": "3ddd1926-b61e-49d0-ada1-c3ad7ab682ad No module named 'cv2'", "exc_info": "Traceback (most recent call last):\n  File \"/label-studio/.venv/lib/python3.12/site-packages/rest_framework/views.py\", line 506, in dispatch\n    response = handler(request, *args, **kwargs)\n               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/label-studio/.venv/lib/python3.12/site-packages/django/utils/decorators.py\", line 48, in _wrapper\n    return bound_method(*args, **kwargs)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/label-studio/label_studio/data_export/api.py\", line 206, in get\n    export_file, content_type, filename = DataExport.generate_export_file(\n                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/label-studio/label_studio/data_export/models.py\", line 168, in generate_export_file\n    converter.convert(input_json, tmp_dir, output_format, is_dir=False)\n  File \"/label-studio/.venv/lib/python3.12/site-packages/label_studio_sdk/converter/converter.py\", line 310, in convert\n    from label_studio_sdk.converter.exports.brush_to_coco import convert_to_coco\n  File \"/label-studio/.venv/lib/python3.12/site-packages/label_studio_sdk/converter/exports/brush_to_coco.py\", line 11, in <module>\n    import cv2\nModuleNotFoundError: No module named 'cv2'", "taskName": null, "sentry_skip": false, "exception_id": "3ddd1926-b61e-49d0-ada1-c3ad7ab682ad", "request_id": null}
{"asctime": "05/Jun/2025:14:23:35 +0000", "name": "core.utils.common", "funcName": "custom_exception_handler", "lineno": 142, "levelname": "DEBUG", "user_id": null, "message": "Traceback (most recent call last):\n  File \"/label-studio/.venv/lib/python3.12/site-packages/rest_framework/views.py\", line 506, in dispatch\n    response = handler(request, *args, **kwargs)\n               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/label-studio/.venv/lib/python3.12/site-packages/django/utils/decorators.py\", line 48, in _wrapper\n    return bound_method(*args, **kwargs)\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/label-studio/label_studio/data_export/api.py\", line 206, in get\n    export_file, content_type, filename = DataExport.generate_export_file(\n                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/label-studio/label_studio/data_export/models.py\", line 168, in generate_export_file\n    converter.convert(input_json, tmp_dir, output_format, is_dir=False)\n  File \"/label-studio/.venv/lib/python3.12/site-packages/label_studio_sdk/converter/converter.py\", line 310, in convert\n    from label_studio_sdk.converter.exports.brush_to_coco import convert_to_coco\n  File \"/label-studio/.venv/lib/python3.12/site-packages/label_studio_sdk/converter/exports/brush_to_coco.py\", line 11, in <module>\n    import cv2\nModuleNotFoundError: No module named 'cv2'\n", "taskName": null, "request_id": null}

[makseq]

1. Is it prebuilt docker image? Or you build it by yourself?
2. Does it happen when you start LS? Or when you try exporting?