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140 lines
2.7 KiB
140 lines
2.7 KiB
---
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description: Learn about YOLO's callback functions from on_train_start to add_integration_callbacks. See how these callbacks modify and save models.
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keywords: YOLO, Ultralytics, callbacks, object detection, training, inference
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---
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# on_pretrain_routine_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_pretrain_routine_start
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<br><br>
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# on_pretrain_routine_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_pretrain_routine_end
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<br><br>
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# on_train_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_train_start
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<br><br>
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# on_train_epoch_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_train_epoch_start
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<br><br>
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# on_train_batch_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_train_batch_start
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<br><br>
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# optimizer_step
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---
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:::ultralytics.yolo.utils.callbacks.base.optimizer_step
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<br><br>
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# on_before_zero_grad
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---
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:::ultralytics.yolo.utils.callbacks.base.on_before_zero_grad
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<br><br>
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# on_train_batch_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_train_batch_end
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<br><br>
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# on_train_epoch_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_train_epoch_end
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<br><br>
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# on_fit_epoch_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_fit_epoch_end
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<br><br>
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# on_model_save
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---
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:::ultralytics.yolo.utils.callbacks.base.on_model_save
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<br><br>
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# on_train_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_train_end
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<br><br>
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# on_params_update
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---
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:::ultralytics.yolo.utils.callbacks.base.on_params_update
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<br><br>
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# teardown
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---
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:::ultralytics.yolo.utils.callbacks.base.teardown
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<br><br>
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# on_val_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_val_start
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<br><br>
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# on_val_batch_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_val_batch_start
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<br><br>
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# on_val_batch_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_val_batch_end
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<br><br>
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# on_val_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_val_end
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<br><br>
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# on_predict_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_predict_start
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<br><br>
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# on_predict_batch_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_predict_batch_start
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<br><br>
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# on_predict_batch_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_predict_batch_end
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<br><br>
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# on_predict_postprocess_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_predict_postprocess_end
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<br><br>
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# on_predict_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_predict_end
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<br><br>
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# on_export_start
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---
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:::ultralytics.yolo.utils.callbacks.base.on_export_start
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<br><br>
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# on_export_end
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---
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:::ultralytics.yolo.utils.callbacks.base.on_export_end
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<br><br>
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# get_default_callbacks
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---
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:::ultralytics.yolo.utils.callbacks.base.get_default_callbacks
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<br><br>
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# add_integration_callbacks
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---
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:::ultralytics.yolo.utils.callbacks.base.add_integration_callbacks
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<br><br>
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