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| # Testing | |
| We introduce the way to test pretrained models on datasets here. | |
| ## Testing with Single GPU | |
| You can use `tools/test.py` to perform single CPU/GPU inference. For example, to evaluate DBNet on IC15: (You can download pretrained models from [Model Zoo](modelzoo.md)): | |
| ```shell | |
| ./tools/dist_test.sh configs/textdet/dbnet/dbnet_r18_fpnc_1200e_icdar2015.py dbnet_r18_fpnc_sbn_1200e_icdar2015_20210329-ba3ab597.pth --eval hmean-iou | |
| ``` | |
| And here is the full usage of the script: | |
| ```shell | |
| python tools/test.py ${CONFIG_FILE} ${CHECKPOINT_FILE} [ARGS] | |
| ``` | |
| :::{note} | |
| By default, MMOCR prefers GPU(s) to CPU. If you want to test a model on CPU, please empty `CUDA_VISIBLE_DEVICES` or set it to -1 to make GPU(s) invisible to the program. Note that running CPU tests requires **MMCV >= 1.4.4**. | |
| ```bash | |
| CUDA_VISIBLE_DEVICES= python tools/test.py ${CONFIG_FILE} ${CHECKPOINT_FILE} [ARGS] | |
| ``` | |
| ::: | |
| | ARGS | Type | Description | | |
| | ------------------ | --------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | |
| | `--out` | str | Output result file in pickle format. | | |
| | `--fuse-conv-bn` | bool | Path to the custom config of the selected det model. | | |
| | `--format-only` | bool | Format the output results without performing evaluation. It is useful when you want to format the results to a specific format and submit them to the test server. | | |
| | `--gpu-id` | int | GPU id to use. Only applicable to non-distributed training. | | |
| | `--eval` | 'hmean-ic13', 'hmean-iou', 'acc' | The evaluation metrics, which depends on the task. For text detection, the metric should be either 'hmean-ic13' or 'hmean-iou'. For text recognition, the metric should be 'acc'. | | |
| | `--show` | bool | Whether to show results. | | |
| | `--show-dir` | str | Directory where the output images will be saved. | | |
| | `--show-score-thr` | float | Score threshold (default: 0.3). | | |
| | `--gpu-collect` | bool | Whether to use gpu to collect results. | | |
| | `--tmpdir` | str | The tmp directory used for collecting results from multiple workers, available when gpu-collect is not specified. | | |
| | `--cfg-options` | str | Override some settings in the used config, the key-value pair in xxx=yyy format will be merged into the config file. If the value to be overwritten is a list, it should be of the form of either key="[a,b]" or key=a,b. The argument also allows nested list/tuple values, e.g. key="[(a,b),(c,d)]". Note that the quotation marks are necessary and that no white space is allowed. | | |
| | `--eval-options` | str | Custom options for evaluation, the key-value pair in xxx=yyy format will be kwargs for dataset.evaluate() function. | | |
| | `--launcher` | 'none', 'pytorch', 'slurm', 'mpi' | Options for job launcher. | | |
| ## Testing with Multiple GPUs | |
| MMOCR implements **distributed** testing with `MMDistributedDataParallel`. | |
| You can use the following command to test a dataset with multiple GPUs. | |
| ```shell | |
| [PORT={PORT}] ./tools/dist_test.sh ${CONFIG_FILE} ${CHECKPOINT_FILE} ${GPU_NUM} [PY_ARGS] | |
| ``` | |
| | Arguments | Type | Description | | |
| | --------- | ---- | -------------------------------------------------------------------------------- | | |
| | `PORT` | int | The master port that will be used by the machine with rank 0. Defaults to 29500. | | |
| | `PY_ARGS` | str | Arguments to be parsed by `tools/test.py`. | | |
| For example, | |
| ```shell | |
| ./tools/dist_test.sh configs/example_config.py work_dirs/example_exp/example_model_20200202.pth 1 --eval hmean-iou | |
| ``` | |
| ## Testing with Slurm | |
| If you run MMOCR on a cluster managed with [Slurm](https://slurm.schedmd.com/), you can use the script `tools/slurm_test.sh`. | |
| ```shell | |
| [GPUS=${GPUS}] [GPUS_PER_NODE=${GPUS_PER_NODE}] [SRUN_ARGS=${SRUN_ARGS}] ./tools/slurm_test.sh ${PARTITION} ${JOB_NAME} ${CONFIG_FILE} ${CHECKPOINT_FILE} [PY_ARGS] | |
| ``` | |
| | Arguments | Type | Description | | |
| | --------------- | ---- | ----------------------------------------------------------------------------------------------------------- | | |
| | `GPUS` | int | The number of GPUs to be used by this task. Defaults to 8. | | |
| | `GPUS_PER_NODE` | int | The number of GPUs to be allocated per node. Defaults to 8. | | |
| | `SRUN_ARGS` | str | Arguments to be parsed by srun. Available options can be found [here](https://slurm.schedmd.com/srun.html). | | |
| | `PY_ARGS` | str | Arguments to be parsed by `tools/test.py`. | | |
| Here is an example of using 8 GPUs to test an example model on the 'dev' partition with job name 'test_job'. | |
| ```shell | |
| GPUS=8 ./tools/slurm_test.sh dev test_job configs/example_config.py work_dirs/example_exp/example_model_20200202.pth --eval hmean-iou | |
| ``` | |
| ## Batch Testing | |
| By default, MMOCR tests the model image by image. For faster inference, you may change `data.val_dataloader.samples_per_gpu` and `data.test_dataloader.samples_per_gpu` in the config. For example, | |
| ``` | |
| data = dict( | |
| ... | |
| val_dataloader=dict(samples_per_gpu=16), | |
| test_dataloader=dict(samples_per_gpu=16), | |
| ... | |
| ) | |
| ``` | |
| will test the model with 16 images in a batch. | |
| :::{warning} | |
| Batch testing may incur performance decrease of the model due to the different behavior of the data preprocessing pipeline. | |
| ::: | |