# Training-aware Quantization of image classification model - quick start
This tutorial shows how to do training-aware quantization using [API](https://github.com/PaddlePaddle/PaddleSlim/blob/develop/docs/docs/api/quantization_api.md) in PaddleSlim. We use MobileNetV1 to train image classification model as example. The tutorial contains follow sections:
This tutorial shows how to do training-aware quantization using [API](https://paddlepaddle.github.io/PaddleSlim/api_en/paddleslim.quant.html#paddleslim.quant.quanter.quant_aware) in PaddleSlim. We use MobileNetV1 to train image classification model as example. The tutorial contains follow sections:
1. Necessary imports
2. Model architecture
...
...
@@ -89,7 +89,7 @@ test(val_program)
## 4. Quantization
We call ``quant_aware`` API to add quantization and dequantization operators in ``train_program`` and ``val_program`` according to [default configuration](https://paddlepaddle.github.io/PaddleSlim/api/quantization_api/#_1).
We call ``quant_aware`` API to add quantization and dequantization operators in ``train_program`` and ``val_program`` according to [default configuration](https://paddlepaddle.github.io/PaddleSlim/api_cn/quantization_api.html#id2).
The model in ``4. Quantization`` after calling ``slim.quant.quant_aware`` API is only suitable to train. To get the inference model, we should use [slim.quant.convert](https://paddlepaddle.github.io/PaddleSlim/api/quantization_api/#convert) API to change model architecture and use [fluid.io.save_inference_model](https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/api_cn/io_cn/save_inference_model_cn.html#save-inference-model) to save model. ``float_prog``'s parameters are float32 dtype but in int8's range which can be used in ``fluid`` or ``paddle-lite``. ``paddle-lite`` will change the parameters' dtype from float32 to int8 first when loading the inference model. ``int8_prog``'s parameters are int8 dtype and we can get model size after quantization by saving it. ``int8_prog`` cannot be used in ``fluid`` or ``paddle-lite``.
The model in ``4. Quantization`` after calling ``slim.quant.quant_aware`` API is only suitable to train. To get the inference model, we should use [slim.quant.convert](https://paddlepaddle.github.io/PaddleSlim/api_en/paddleslim.quant.html#paddleslim.quant.quanter.convert) API to change model architecture and use [fluid.io.save_inference_model](https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/api_cn/io_cn/save_inference_model_cn.html#save-inference-model) to save model. ``float_prog``'s parameters are float32 dtype but in int8's range which can be used in ``fluid`` or ``paddle-lite``. ``paddle-lite`` will change the parameters' dtype from float32 to int8 first when loading the inference model. ``int8_prog``'s parameters are int8 dtype and we can get model size after quantization by saving it. ``int8_prog`` cannot be used in ``fluid`` or ``paddle-lite``.
# Post-training Quantization of image classification model - quick start
This tutorial shows how to do post training quantization using [API](https://github.com/PaddlePaddle/PaddleSlim/blob/develop/docs/docs/api/quantization_api.md) in PaddleSlim. We use MobileNetV1 to train image classification model as example. The tutorial contains follow sections:
This tutorial shows how to do post training quantization using [API](https://paddlepaddle.github.io/PaddleSlim/api_en/paddleslim.quant.html#paddleslim.quant.quanter.quant_post) in PaddleSlim. We use MobileNetV1 to train image classification model as example. The tutorial contains follow sections: