SiameseOI with TAO Deploy

To generate an optimized TensorRT engine, a SiameseOI .etlt or .onnx file, which is first generated using tao model visual_changenet export, is taken as an input to tao deploy visual_changenet gen_trt_engine. For more information about training a SiameseOI model, refer to the SiameseOI training documentation.

Converting an ETLT or ONNX File into TensorRT Engine

gen_trt_engine

The gen_trt_engine section in the experiment specification file provides options for generating a TensorRT engine from an .etlt or .onnx file. The following is an example configuration:

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            gen_trt_engine:
  results_dir: "${results_dir}/gen_trt_engine"
  onnx_file: "${results_dir}/export/oi_model.onnx"
  trt_engine: "${results_dir}/gen_trt_engine/oi_model.trt.v100"
  input_channel: 3
  input_width: 400
  input_height: 100
  tensorrt:
    data_type: fp32
    workspace_size: int = 1024
    min_batch_size: int = 1
    opt_batch_size: int = 1
    max_batch_size: int = 1

Parameter	Datatype	Default	Description	Supported Values
`results_dir`	string	–	The path to the results directory	–
`onnx_file`	string	–	The path to the exported ETLT or ONNX model	–
`trt_engine`	string	–	The absolute path to the generated TensorRT engine	–
`input_channel`	unsigned int	3	The input channel size. Only a value of 3 is supported.	3
`input_width`	unsigned int	400	The input width	>0
`input_height`	unsigned int	100	The input height	>0
`batch_size`	unsigned int	-1	The batch size of the ONNX model	>=-1

tensorrt

The tensorrt parameter defines TensorRT engine generation.

Parameter	Datatype	Default	Description	Supported Values
`data_type`	string	fp32	The precision to be used for the TensorRT engine	fp32/fp16/int8
`workspace_size`	unsigned int	1024	The maximum workspace size for the TensorRT engine	>1024
`min_batch_size`	unsigned int	1	The minimum batch size used for the optimization profile shape	>0
`opt_batch_size`	unsigned int	1	The optimal batch size used for the optimization profile shape	>0
`max_batch_size`	unsigned int	1	The maximum batch size used for the optimization profile shape	>0

Use the following command to run SiameseOI engine generation:

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            tao deploy optical_inspection gen_trt_engine -e /path/to/spec.yaml \
           -r /path/to/etlt/file \
           gen_trt_engine.onnx_file=/path/to/onnx/file \
           gen_trt_engine.trt_engine=/path/to/engine/file \
           gen_trt_engine.tensorrt.data_type=<data_type>

Required Arguments

-e, --experiment_spec_file: The path to the experiment spec file
results_dir: The global results directory. The engine generation log will be saved in the results_dir.
gen_trt_engine.onnx_file: The .onnx model to be converted
gen_trt_engine.trt_engine: The path where the generated engine will be stored
gen_trt_engine.tensorrt.data_type: The precision to be exported

Sample Usage

Here’s an example of using the gen_trt_engine command to generate an FP16 TensorRT engine:

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            tao deploy optical_inspection gen_trt_engine -e $DEFAULT_SPEC
           -r $RESULTS_DIR
           gen_trt_engine.onnx_file=$ONNX_FILE \
           gen_trt_engine.trt_engine=$ENGINE_FILE \
           gen_trt_engine.tensorrt.data_type=FP16

Running Inference through TensorRT Engine

You can reuse the spec file that was specified for TAO inference. The following is an example inference spec:

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            inference:
  gpu_id: 0
  trt_engine: /path/to/engine/file
  results_dir: "${results_dir}/inference"

Use the following command to run SiameseOI engine inference:

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            tao deploy optical_inspection inference -e /path/to/spec.yaml \
           -r $RESULTS_DIR \

Required Arguments

-e, --experiment_spec_file: The path to the experiment spec file
results_dir: The global results directory. The engine generation log will be saved in the results_dir.

Sample Usage

Here’s an example of using the inference command to run inference with the TensorRT engine:

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            tao deploy optical_inspection inference -e $DEFAULT_SPEC
           -r $RESULTS_DIR