54 lines
2.9 KiB
Markdown
54 lines
2.9 KiB
Markdown
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# 导出为 TFLite
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[TensorFlow Lite](https://www.tensorflow.org/lite/guide) 是一个轻量级框架，用于资源受限的设备上，如手机、嵌入式系统和物联网（IoT）设备，部署机器学习模型。TFLite 旨在在计算能力、内存和功耗有限的设备上优化和高效运行模型。模型以一种特殊的高效可移植格式表示，其文件扩展名为 `.tflite`。
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🤗 Optimum 通过 `exporters.tflite` 模块提供将 🤗 Transformers 模型导出至 TFLite 格式的功能。请参考 [🤗 Optimum 文档](https://huggingface.co/docs/optimum/exporters/tflite/overview) 以获取支持的模型架构列表。
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要将模型导出为 TFLite 格式，请安装所需的依赖项：
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```bash
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pip install optimum[exporters-tf]
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```
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请参阅 [🤗 Optimum 文档](https://huggingface.co/docs/optimum/main/en/exporters/tflite/usage_guides/export_a_model) 以查看所有可用参数，或者在命令行中查看帮助：
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```bash
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optimum-cli export tflite --help
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```
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运行以下命令，以从 🤗 Hub 导出模型的检查点（checkpoint），以 `google-bert/bert-base-uncased` 为例：
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```bash
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optimum-cli export tflite --model google-bert/bert-base-uncased --sequence_length 128 bert_tflite/
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```
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你应该能在日志中看到导出进度以及生成的 `model.tflite` 文件的保存位置，如下所示：
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```bash
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Validating TFLite model...
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-[✓] TFLite model output names match reference model (logits)
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- Validating TFLite Model output "logits":
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-[✓] (1, 128, 30522) matches (1, 128, 30522)
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-[x] values not close enough, max diff: 5.817413330078125e-05 (atol: 1e-05)
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The TensorFlow Lite export succeeded with the warning: The maximum absolute difference between the output of the reference model and the TFLite exported model is not within the set tolerance 1e-05:
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- logits: max diff = 5.817413330078125e-05.
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The exported model was saved at: bert_tflite
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```
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上面的示例说明了从 🤗 Hub 导出检查点的过程。导出本地模型时，首先需要确保将模型的权重和分词器文件保存在同一目录（`local_path`）中。在使用 CLI（命令行）时，将 `local_path` 传递给 `model` 参数，而不是 🤗 Hub 上的检查点名称。 |