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Training data is a required parameter andis passed in using the `training` key of the data section. You can optionally specify another MLtable as a validation data with the `validation` key. If no validation data is specified, 20% of your training data will be used for validation by default, unless you pass`validation_data_size` argument with a different value.
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Training data is a required parameter andis passed in using the `training_data` key. You can optionally specify another MLtable as a validation data with the `validation_data` key. If no validation data is specified, 20% of your training data will be used for validation by default, unless you pass`validation_data_size` argument with a different value.
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Target column name is a required parameter and used as target for supervised ML task. It's passed in using the `target_column_name` key in the data section. For example,
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Target column name is a required parameter and used as target for supervised ML task. It's passed in using the `target_column_name` key. For example,
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```yaml
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target_column_name: label
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If you wish to use the default hyperparameter values for a given algorithm (say yolov5), you can specify it using model_name key inimage_model section. For example,
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If you wish to use the default hyperparameter values for a given algorithm (say yolov5), you can specify it using model_name key intraining_parameters section. For example,
If you wish to use the default hyperparameter values for a given algorithm (say yolov5), you can specify it using model_name parameter inset_image_model method of the task specific `automl` job. For example,
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If you wish to use the default hyperparameter values for a given algorithm (say yolov5), you can specify it using model_name parameter inset_training_parameters method of the task specific `automl` job. For example,
Once you've built a baseline model, you might want to optimize model performance in order to sweep over the model algorithm and hyperparameter space. You can use the following sample config to sweep over the hyperparameters for each algorithm, choosing from a range of values for learning_rate, optimizer, lr_scheduler, etc., to generate a model with the optimal primary metric. If hyperparameter values aren't specified, then default values are used for the specified algorithm.
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Once you've built a baseline model, you might want to optimize model performance in order to sweep over the model algorithm and hyperparameter space. You can use the following sample config to [sweep over the hyperparameters](./how-to-auto-train-image-models.md#sweeping-hyperparameters-for-your-model) for each algorithm, choosing from a range of values for learning_rate, optimizer, lr_scheduler, etc., to generate a model with the optimal primary metric. If hyperparameter values aren't specified, then default values are used for the specified algorithm.
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### Primary metric
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When training computer vision models, model performance depends heavily on the hyperparameter values selected. Often, you might want to tune the hyperparameters to get optimal performance.
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With support for computer vision tasks in automated ML, you can sweep hyperparameters to find the optimal settings for your model. This feature applies the hyperparameter tuning capabilities in Azure Machine Learning. [Learn how to tune hyperparameters](how-to-tune-hyperparameters.md).
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### Update inference settings
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In the previous step, we downloaded a file`mlflow-model/artifacts/settings.json`from the best model. which can be used to update the inference settings before registering the model. Although its's recommended to use the same parameters as training for best performance.
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In the previous step, we downloaded a file`mlflow-model/artifacts/settings.json`from the best model. which can be used to update the inference settings before registering the model. Although it's recommended to use the same parameters as training for best performance.
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Each of the tasks (and some models) has a set of parameters. By default, we use the same values for the parameters that were used during the training and validation. Depending on the behavior that we need when using the model for inference, we can change these parameters. Below you can find a list of parameters for each task typeand model.
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To generate models for computer vision tasks with automated machine learning, you need to bring labeled image data as input for model training in the form of an `MLTable`.
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You can create an `MLTable` from labeled training data in JSONL format.
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If your labeled training data is in a different format (like, pascal VOC or COCO), you can use a conversion script to first convert it to JSONL, and then create an `MLTable`. Alternatively, you can use Azure Machine Learning's [data labeling tool](how-to-create-image-labeling-projects.md) to manually label images, and export the labeled data to use for training your AutoML model.
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If your labeled training data is in a different format (like, pascal VOC or COCO), you can use a [conversion script](https://github.com/Azure/azureml-examples/blob/main/sdk/jobs/automl-standalone-jobs/automl-image-object-detection-task-fridge-items/coco2jsonl.py) to first convert it to JSONL, and then create an `MLTable`. Alternatively, you can use Azure Machine Learning's [data labeling tool](how-to-create-image-labeling-projects.md) to manually label images, and export the labeled data to use for training your AutoML model.
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## Prerequisites
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## Get labeled data
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In order to train computer vision models using AutoML, you need to first get labeled training data. The images need to be uploaded to the cloud and label annotations need to be in JSONL format. You can either use the Azure ML Data Labeling tool to label your data or you could start with pre-labeled image data.
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###Using Azure ML Data Labeling tool to label your training data
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## Using Azure ML Data Labeling tool to label your training data
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If you don't have pre-labeled data, you can use Azure Machine Learning's [data labeling tool](how-to-create-image-labeling-projects.md) to manually label images. This tool automatically generates the data required for training in the accepted format.
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It helps to create, manage, and monitor data labeling tasks for
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+ Object detection (bounding box)
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+ Instance segmentation (polygon)
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If you already have a data labeling project and you want to use that data, you can [export your labeled data as an Azure ML Dataset](how-to-create-image-labeling-projects.md#export-the-labels). You can then access the exported dataset under the 'Datasets' tab in Azure ML Studio, and download the underlying JSONL file from the Dataset details page under Data sources. The downloaded JSONL file can then be used to create an `MLTable` that can be used by automated ML for training computer vision models.
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If you already have a data labeling project and you want to use that data, you can [export your labeled data as an Azure ML Dataset](how-to-create-image-labeling-projects.md#export-the-labels) and then access the dataset under 'Datasets' tab in Azure ML Studio. This exported dataset can then be passed as an input using `azureml:<tabulardataset_name>:<version>` format. Here is an example on how to pass existing dataset as input for training computer vision models.
If you have previously labeled data that you would like to use to train your model, you will first need to upload the images to the default Azure Blob Storage of your Azure ML Workspace and register it as a data asset.
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# [Azure CLI](#tab/cli)
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Next, you will need to get the label annotations in JSONL format. The schema of labeled data depends on the computer vision task at hand. Refer to [schemas for JSONL files for AutoML computer vision experiments](reference-automl-images-schema.md) to learn more about the required JSONL schema for each task type.
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If your training data is in a different format (like, pascal VOC or COCO), [helper scripts](https://github.com/Azure/azureml-examples/blob/main/python-sdk/tutorials/automl-with-azureml/image-object-detection/coco2jsonl.py) to convert the data to JSONL are available in [notebook examples](https://github.com/Azure/azureml-examples/blob/sdk-preview/sdk/jobs/automl-standalone-jobs).
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If your training data is in a different format (like, pascal VOC or COCO), [helper scripts](https://github.com/Azure/azureml-examples/blob/main/sdk/jobs/automl-standalone-jobs/automl-image-object-detection-task-fridge-items/coco2jsonl.py) to convert the data to JSONL are available in [notebook examples](https://github.com/Azure/azureml-examples/blob/main/sdk/jobs/automl-standalone-jobs).
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## Create MLTable
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###Create MLTable
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Once you have your labeled data in JSONL format, you can use it to create `MLTable` as shown below. MLtable packages your data into a consumable object for training.
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