Tao Train Grounding Dino
NVIDIAOfficialCreated by NVIDIA Corporation
- Skill
- Tool integration
- Data and AI
- Apache-2.0
- Medium risk
AutoGineer summary
Written by AutoGineer from the skill’s own files, not by the author
The tao-train-grounding-dino skill provides a comprehensive pipeline for managing the lifecycle of Grounding DINO models. By combining DINO-style vision detection with a BERT-based text encoder, this skill enables language-guided object detection, allowing users to identify objects based on text prompts rather than a fixed class vocabulary. The skill supports training, evaluation, quantization, and export, with specific workflows for generating TensorRT engines for optimized deployment.
What it does
- Trains Grounding DINO models using ODVG, COCO, or raw datasets.
- Supports language-guided detection via text prompts.
- Enables AutoML for automated hyperparameter optimization during training.
- Provides paths for model export to ONNX and TensorRT engine generation.
- Facilitates model evaluation and inference using text-based object queries.
- Includes specific error handling and configuration guidance for memory-intensive training.
When to use it
- When you need to detect objects that are not defined in a fixed training class list.
- When you want to leverage language-guided detection using text prompts.
- When you are working within the TAO Toolkit ecosystem for model development.
- When you need to optimize detection models for deployment on NVIDIA hardware via TensorRT.
Advantages
- Open-vocabulary detection capability removes the need for retraining on new classes.
- Integrated AutoML support simplifies the hyperparameter tuning process.
- Comprehensive support for the full model lifecycle from training to TensorRT deployment.
- Flexible configuration for backbone models and text encoders.
Usage examples
- “Train a Grounding DINO model using my ODVG dataset.”
- The agent initiates the training workflow, applying the required data source overrides and AutoML policy to begin the training process.
- “Run inference on my images to find fire extinguishers and forklifts.”
- The agent configures the inference job with the specified text prompts and checkpoint, executing the detection workflow.
- “Generate a TensorRT engine for my exported Grounding DINO model.”
- The agent triggers the gen_trt_engine workflow, using the provided ONNX artifact to produce an optimized TensorRT engine.
Install
Download the skill as a ZIP:
https://autogineer.com/agent-skills/nvidia/tao-train-grounding-dino/downloadUnzip it into the cross-client skills folder of your project:
mkdir -p .agents/skills && unzip tao-train-grounding-dino.zip -d .agents/skills
Documentation by NVIDIA Corporation
Grounding DINO
Standalone install? If this session was not initialized by the TAO skill bank plugin, run the
tao-setupskill first (host preflight, credentials, cross-skill discovery).
Grounding DINO for open-set object detection. Combines DINO-style detection with BERT text encoder for language-guided detection. Detects objects described by text prompts without fixed class vocabulary.
Set train.pretrained_model_path for full Grounding DINO weights or model.pretrained_backbone_path for backbone-only.
For TAO Deploy TensorRT actions (gen_trt_engine, TensorRT evaluate, and TensorRT inference), read references/tao-deploy-grounding-dino.md first. Deploy spec templates live in this skill's references/ folder with the spec_template_deploy_*.yaml prefix.
Dataclass Schemas
Generated TAO Core schemas are packaged in schemas/<action>.schema.json, with schemas/manifest.json listing available actions. Each generated schema also emits references/spec_template_<action>.yaml from the schema top-level default field. AutoML enablement is declared at the model layer in references/skill_info.yaml via automl_enabled. Runnable AutoML for an action requires schemas/<action>.schema.json and references/spec_template_<action>.yaml to exist and parse. Use the packaged selected-action schema for automl_default_parameters, automl_disabled_parameters, defaults, min/max bounds, enums, option weights, math conditions, dependencies, and popular parameters. Do not expect ~/tao-core at runtime; maintainers regenerate schemas/templates before packaging the skill bank.
Train Action Policy
This model is AutoML-enabled at the model layer. Before handling any train-stage request, read references/skill_info.yaml and resolve the run override from either an explicit automl_policy value or the user's workflow request. Use automl_policy: on by default and only expose on / off in new launch prompts. Treat phrases like "turn off AutoML", "disable AutoML", "no HPO", or "plain training" as automl_policy: off for this run only. When automl_policy: on, automl_enabled: true, and both schemas/train.schema.json and references/spec_template_train.yaml are packaged, route the train action through tao-skill-bank:tao-run-automl by default with this model's skill_dir. Preserve workflow/application overrides for datasets, specs, output directories, GPU/platform settings, parent checkpoints, and automl_policy. Use direct model training only when automl_policy: off or the packaged train schema/template is missing; in the missing-schema case, report that AutoML is enabled but not runnable for this model until schemas are generated.
Non-train actions such as evaluate, inference, export, and deploy flows stay in this model skill. The per-run automl_policy override does not change model metadata.
Training Requirements
Dataset type: object_detection
Formats: odvg, coco, raw
Training monitoring metric:
val_mAP50AutoML metric contract: for evaluation-backed selection, use
test_mAP50with maximize direction. The packagedevaluateaction emitstest_mAP50; use that evaluator KPI for AutoML trial comparison and final selection rather than the training-onlyval_mAP50key.
Per-Action Dataset Requirements
| Action | Spec Key | Source | Files | List? |
|---|---|---|---|---|
| evaluate | dataset.test_data_sources | eval_dataset | image_dir: images.tar.gz, json_file: annotations.json | No |
| inference | dataset.infer_data_sources.image_dir | inference_dataset | images.tar.gz | Yes |
| inference | dataset.infer_data_sources.captions | workflow prompts | prompt list | Yes |
| quantize | dataset.train_data_sources | train_datasets | image_dir: images.tar.gz, json_file: annotations_odvg.jsonl, label_map: annotations_odvg_labelmap.json | Yes |
| quantize | dataset.val_data_sources | eval_dataset | image_dir: images.tar.gz, json_file: annotations.json | No |
| quantize | dataset.quant_calibration_data_sources | calibration/eval dataset | image_dir: images.tar.gz, json_file: annotations.json | No |
| train | dataset.train_data_sources | train_datasets | image_dir: images.tar.gz, json_file: annotations_odvg.jsonl, label_map: annotations_odvg_labelmap.json | Yes |
| train | dataset.val_data_sources | eval_dataset | image_dir: images.tar.gz, json_file: annotations.json | No |
The runner may source image archives as images.tar.gz, but direct local
Docker TAO CLI specs must point image_dir to an extracted image directory.
Skill metadata marks these archive-backed image sources with
runtime: extracted_folder so a fresh runner can unpack the archive before
launching TAO.
Typical Spec Overrides
Data source overrides are mandatory for every action — the agent MUST construct data source paths from the Per-Action Dataset Requirements table above and include them in spec_overrides.
S3_TRAIN = "s3://bucket/data/train"
S3_EVAL = "s3://bucket/data/eval"train (mandatory data sources):
{
"train.num_epochs": 10,
"train.checkpoint_interval": 10,
"train.validation_interval": 10,
"train.num_gpus": 1,
"dataset.train_data_sources": [{"image_dir": f"{S3_TRAIN}/images.tar.gz", "json_file": f"{S3_TRAIN}/annotations_odvg.jsonl", "label_map": f"{S3_TRAIN}/annotations_odvg_labelmap.json"}],
"dataset.val_data_sources": {"image_dir": f"{S3_EVAL}/images.tar.gz", "json_file": f"{S3_EVAL}/annotations.json"},
}deploy/gen_trt_engine (use references/tao-deploy-grounding-dino.md):
{
"gen_trt_engine.onnx_file": "<exported_onnx_uri>",
"gen_trt_engine.trt_engine": "<output_engine_path>",
"gen_trt_engine.tensorrt.data_type": "FP16",
}inference (mandatory data sources):
{
"inference.checkpoint": "<selected train/AutoML checkpoint>",
"dataset.infer_data_sources.image_dir": [f"{S3_EVAL}/images.tar.gz"],
"dataset.infer_data_sources.captions": [
"fire extinguisher",
"cone",
"cart",
"forklift"
],
}evaluate (mandatory data sources):
{
"evaluate.checkpoint": "<selected train/AutoML checkpoint>",
"dataset.test_data_sources": {"image_dir": f"{S3_EVAL}/images.tar.gz", "json_file": f"{S3_EVAL}/annotations.json"},
}quantize (mandatory data sources):
{
"quantize.model_path": "<selected train checkpoint or exported ONNX model>",
"dataset.train_data_sources": [{"image_dir": f"{S3_TRAIN}/images.tar.gz", "json_file": f"{S3_TRAIN}/annotations_odvg.jsonl", "label_map": f"{S3_TRAIN}/annotations_odvg_labelmap.json"}],
"dataset.val_data_sources": {"image_dir": f"{S3_EVAL}/images.tar.gz", "json_file": f"{S3_EVAL}/annotations.json"},
"dataset.quant_calibration_data_sources": {"image_dir": f"{S3_EVAL}/images.tar.gz", "json_file": f"{S3_EVAL}/annotations.json"},
}Eval Dataset
Optional. Validation uses COCO-format annotations for mAP even though training can use ODVG format.
Important Parameters
model.backbone: Default swin_tiny_224_1k. Also supports resnet_50 and other Swin variants. Swin generally performs better for grounding tasks.
model.text_encoder_type: BERT model for text encoding. Default bert-base-uncased. max_text_len defaults to 256.
model.max_text_len: Keep this aligned with the dataset label/token position maps. Do not shrink it for smoke tests unless the corresponding label maps are regenerated with the same length; otherwise validation can fail with a matrix shape mismatch between token probabilities and position maps.
train.optim.lr: Learning rate. Default 2e-4. lr_backbone 2e-5. Supports bf16 precision in addition to fp16/fp32.
dataset.max_labels: Maximum labels per image during training. Default 50. Increase for dense annotation datasets.
model.num_queries: Object queries. Default 900 (higher than DINO's 300) due to open-vocabulary nature.
model.num_queries / model.num_select: Keep
num_querieshigh enough for the number of matched ODVG targets in a batch. Very small smoke values such as 20 can fail during Hungarian target indexing on dense images; use at least 100 for minimal Grounding DINO smoke runs unless the dataset is known to have fewer objects per image.train.optim.lr_steps: MultiStep LR schedule. Default [10].
Multi-GPU / Multi-Node
Launch method: Lightning-managed (single python process, Lightning spawns workers).
| Spec Key | Description | Default |
|---|---|---|
train.num_gpus | Number of GPUs | 1 |
train.gpu_ids | GPU device indices | [0] |
train.num_nodes | Number of nodes | 1 |
train.distributed_strategy | ddp or fsdp | ddp |
Same DDP/FSDP behavior as DINO. Multi-node requires WORLD_SIZE, NODE_RANK, MASTER_ADDR, MASTER_PORT env vars set by orchestrator.
Export / TRT Defaults
Export input: 960x544 (larger than other OD models), opset 17. Keep Grounding-DINO export specs at the template export resolution for smoke tests; reducing export to very small image sizes such as 128x128 can trigger a PyTorch ONNX shape-inference assertion in the contrastive text head during
torch.onnx.export.The parent PyTorch
grounding_dinoCLI supportstrain,evaluate,inference,export, andquantize. Run TensorRT engine generation, TensorRT inference, and TensorRT evaluation throughreferences/tao-deploy-grounding-dino.md.TRT data types: FP32, FP16 only — INT8 is NOT supported
TRT workspace: 8192 MB (8x larger than other OD models)
TRT max_batch_size: 4
Hardware
Minimum 1 GPU(s), recommended 4 GPU(s). 24GB+ (A100 recommended) VRAM per GPU. Grounding DINO is heavier than standard DINO due to the text encoder (BERT). 24GB+ GPU memory recommended. Reduce batch_size for 16GB GPUs.
Error Patterns
CUDA out of memory: Reduce batch_size (4 -> 2 -> 1). The BERT text encoder adds significant memory overhead on top of the vision backbone.
Val annotation category IDs: Validation annotations should have category IDs starting from 0 for correct loss computation. Use annotation format conversion if needed.
Text encoder loading error: Ensure the container has access to download bert-base-uncased weights or provide a local path.
Quantize with a PyTorch checkpoint fails in TAO Toolkit 7.0.0-rc-226:
The container's Grounding-DINO quantize script passes cap_lists=None when
loading a checkpoint, which fails in post_process.py. ONNX quantization uses
the exported ONNX artifact and COCO calibration data, but the default rc-226
PyTorch image also lacks the modelopt.onnx.quantization module. Treat this as
an image/SDK blocker, not a checkpoint resolver issue.
mat1 and mat2 shapes cannot be multiplied in post_process.py: The text
token length and label position maps are inconsistent, commonly because
model.max_text_len was overridden below the default 256 while the dataset
label maps still use 256-length position maps. Restore model.max_text_len or
regenerate the label maps with the same length.
index is out of bounds for dimension 0 in criterion.py: model.num_queries
is too small for the matched ODVG targets in the current batch. Increase
model.num_queries and keep model.num_select compatible with it.
NotADirectoryError with images.tar.gz/<image>.jpg: The direct TAO CLI is
trying to traverse an archive path as a directory. Extract the archive and set
the relevant image_dir field to the extracted image folder; archive-backed
skill data sources use runtime: extracted_folder for this reason.
Spec Param / Parent Model Inference
Model-specific inference mappings belong in this MD file, not in config.json. Generated runners should read this section and apply the mappings with SDK helpers before create_job(). This mirrors the old microservices infer_params.py flow.
Inference mappings from TAO Core grounding_dino.config.json:
| Action | Spec Field | Inference Function | Meaning |
|---|---|---|---|
| evaluate | encryption_key | key | encryption key |
| evaluate | evaluate.checkpoint | parent_model | model file inferred from the parent job results folder |
| evaluate | evaluate.trt_engine | parent_model | model file inferred from the parent job results folder |
| evaluate | results_dir | output_dir | current job results directory |
| export | encryption_key | key | encryption key |
| export | export.checkpoint | parent_model | model file inferred from the parent job results folder |
| export | export.onnx_file | create_onnx_file | output ONNX path |
| export | results_dir | output_dir | current job results directory |
| inference | encryption_key | key | encryption key |
| inference | inference.checkpoint | parent_model | model file inferred from the parent job results folder |
| inference | inference.trt_engine | parent_model | model file inferred from the parent job results folder |
| inference | results_dir | output_dir | current job results directory |
| quantize | encryption_key | key | encryption key |
| quantize | quantize.model_path | parent_model | model file inferred from the parent job results folder |
| quantize | results_dir | output_dir | current job results directory |
| train | encryption_key | key | encryption key |
| train | model.pretrained_backbone_path | ptm_if_no_resume_model | PTM when no resume checkpoint exists |
| train | results_dir | output_dir | current job results directory |
| train | train.pretrained_model_path | ptm_if_no_resume_model | PTM when no resume checkpoint exists |
| train | train.resume_training_checkpoint_path | resume_model | model file inferred from the current job results folder |
For parent_model or parent_model_folder, pass the upstream train/export/AutoML child job id as parent_job_id. The SDK lists the parent result folder, filters checkpoint artifacts, and returns the selected model file or folder. Do not add these mappings back to config.json and do not patch generated runner scripts to guess checkpoint paths.
When selecting a Grounding-DINO checkpoint outside the SDK resolver, match the
intended epoch/step artifact exactly, for example
model_epoch_000_step_00046.pth. The gdino_model_latest.pth symlink is valid
only when latest is explicitly requested. Carry structural model settings such
as model.backbone, model.num_queries, model.num_select,
model.num_feature_levels, model.max_text_len, and export input resolution
forward into evaluate, inference, export, and deploy specs so checkpoint and
engine shapes match.
Deployment
Files
- ATTRIBUTION.mdAdded by AutoGineer942 B
- BENCHMARK.md7.0 KiB
- LICENSELicence file added by AutoGineer11.2 KiB
- SKILL.md15.2 KiB
- config/skillspector-baseline.yaml834 B
- evals/evals.json805 B
- references/skill_info.yaml6.0 KiB
- references/spec_template_deploy_evaluate.yaml375 B
- references/spec_template_deploy_gen_trt_engine.yaml343 B
- references/spec_template_deploy_inference.yaml417 B
- references/spec_template_evaluate.yaml3.2 KiB
- references/spec_template_export.yaml3.3 KiB
- references/spec_template_gen_trt_engine.yaml3.4 KiB
- references/spec_template_inference.yaml3.3 KiB
- references/spec_template_quantize.yaml3.1 KiB
- references/spec_template_train.yaml3.1 KiB
- references/tao-deploy-grounding-dino.md5.4 KiB
- references/tao-deploy-grounding-dino.skill_info.yaml2.9 KiB
- schemas/evaluate.schema.json56.2 KiB
- schemas/export.schema.json56.8 KiB
- schemas/gen_trt_engine.schema.json58.5 KiB
- schemas/inference.schema.json57.2 KiB
- schemas/manifest.json16.0 KiB
- schemas/quantize.schema.json52.9 KiB
- schemas/train.schema.json52.9 KiB
- skill-card.md4.2 KiB
- skill.oms.sig9.4 KiB
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Requirements and compatibility
Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta
“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.
Needs: Declares allowed tools, Needs Python, Needs Node.js
The author says: Requires docker + nvidia-container-toolkit.
Security
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Attribution and licence
- Created by
- NVIDIA Corporation
- Publisher
- NVIDIA (Official)
- Source
- NVIDIA/skills · skills/tao-train-grounding-dino · commit fce3cca
- Licence
- Apache License 2.0 (redistribution allowed)
- LICENSE (added by AutoGineer from LICENSE-APACHE)
- ATTRIBUTION.md (written by AutoGineer)
- Synced
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