output_predictions.md

Output prediction results

If you want to save the prediction results as a specific file for offline evaluation, MMYOLO currently supports both json and pkl formats.

The json file only save `image_id`, `bbox`, `score` and `category_id`. The json file can be read using the json library.
The pkl file holds more content than the json file, and also holds information such as the file name and size of the predicted image; the pkl file can be read using the pickle library. The pkl file can be read using the pickle library.

Output into json file

If you want to output the prediction results as a json file, the command is as follows.

python tools/test.py {path_to_config} {path_to_checkpoint} --json-prefix {json_prefix}

The argument after --json-prefix should be a filename prefix (no need to enter the .json suffix) and can also contain a path. For a concrete example:

python tools/test.py configs\yolov5\yolov5_s-v61_syncbn_8xb16-300e_coco.py yolov5_s-v61_syncbn_fast_8xb16-300e_coco_20220918_084700-86e02187.pth --json-prefix work_dirs/demo/json_demo

Running the above command will output the json_demo.bbox.json file in the work_dirs/demo folder.

Output into pkl file

If you want to output the prediction results as a pkl file, the command is as follows.

python tools/test.py {path_to_config} {path_to_checkpoint} --out {path_to_output_file}

The argument after --out should be a full filename (must be with a .pkl or .pickle suffix) and can also contain a path. For a concrete example:

python tools/test.py configs\yolov5\yolov5_s-v61_syncbn_8xb16-300e_coco.py yolov5_s-v61_syncbn_fast_8xb16-300e_coco_20220918_084700-86e02187.pth --out work_dirs/demo/pkl_demo.pkl

Running the above command will output the pkl_demo.pkl file in the work_dirs/demo folder.