--- comments: true --- # Text Recognition Module Tutorial ## I. Overview The text recognition module is the core component of an OCR (Optical Character Recognition) system, responsible for extracting text information from text regions within images. The performance of this module directly impacts the accuracy and efficiency of the entire OCR system. The text recognition module typically receives bounding boxes of text regions output by the text detection module as input. Through complex image processing and deep learning algorithms, it converts the text in images into editable and searchable electronic text. The accuracy of text recognition results is crucial for subsequent applications such as information extraction and data mining. ## II. Supported Model List > The inference time only includes the model inference time and does not include the time for pre- or post-processing.
ModelModel Download Link Recognition Avg Accuracy(%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Introduction
PP-OCRv5_server_rec Inference Model/Training Model 86.38 8.46 / 2.36 31.21 / 31.21 81 PP-OCRv5_rec is a next-generation text recognition model. This model is dedicated to efficiently and accurately supporting four major languages—Simplified Chinese, Traditional Chinese, English, and Japanese—with a single model. It supports complex text scenarios, including handwritten, vertical text, pinyin, and rare characters. While maintaining recognition accuracy, it also balances inference speed and model robustness, providing efficient and precise technical support for document understanding in various scenarios.
PP-OCRv5_mobile_rec Inference Model/Training Model 81.29 5.43 / 1.46 21.20 / 5.32 16
PP-OCRv4_server_rec_doc Inference Model/Training Model 86.58 8.69 / 2.78 37.93 / 37.93 182 PP-OCRv4_server_rec_doc is trained on a mixed dataset of more Chinese document data and PP-OCR training data based on PP-OCRv4_server_rec. It has added the ability to recognize some traditional Chinese characters, Japanese, and special characters, and can support the recognition of more than 15,000 characters. In addition to improving the text recognition capability related to documents, it also enhances the general text recognition capability.
PP-OCRv4_mobile_rec Inference Model/Training Model 78.74 5.26 / 1.12 17.48 / 3.61 10.5 The lightweight recognition model of PP-OCRv4 has high inference efficiency and can be deployed on various hardware devices, including edge devices.
PP-OCRv4_server_rec Inference Model/Training Model 85.19 8.75 / 2.49 36.93 / 36.93 173 The server-side model of PP-OCRv4 offers high inference accuracy and can be deployed on various types of servers.
en_PP-OCRv4_mobile_rec Inference Model/Training Model 70.39 4.81 / 1.23 17.20 / 4.18 7.5 The ultra-lightweight English recognition model, trained based on the PP-OCRv4 recognition model, supports the recognition of English letters and numbers.
> ❗ The above list features the 4 core models that the text recognition module primarily supports. In total, this module supports 18 models. The complete list of models is as follows:
👉Model List Details * PP-OCRv5 Multi-Scenario Model
ModelModel Download Link Chinese Recognition Avg Accuracy (%) English Recognition Avg Accuracy (%) Traditional Chinese Recognition Avg Accuracy (%) Japanese Recognition Avg Accuracy (%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Description
PP-OCRv5_server_rec Inference Model/Training Model 86.38 64.70 93.29 60.35 8.46 / 2.36 31.21 / 31.21 81 PP-OCRv5_rec is a next-generation text recognition model. This model efficiently and accurately supports four major languages with a single model: Simplified Chinese, Traditional Chinese, English, and Japanese. It recognizes complex text scenarios including handwritten, vertical text, pinyin, and rare characters. While maintaining recognition accuracy, it balances inference speed and model robustness, providing efficient and precise technical support for document understanding in various scenarios.
PP-OCRv5_mobile_rec Inference Model/Training Model 81.29 66.00 83.55 54.65 5.43 / 1.46 21.20 / 5.32 16
* Chinese Recognition Model
ModelModel Download Link Recognition Avg Accuracy(%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Introduction
PP-OCRv4_server_rec_doc Inference Model/Training Model 86.58 8.69 / 2.78 37.93 / 37.93 182 PP-OCRv4_server_rec_doc is trained on a mixed dataset of more Chinese document data and PP-OCR training data based on PP-OCRv4_server_rec. It has added the recognition capabilities for some traditional Chinese characters, Japanese, and special characters. The number of recognizable characters is over 15,000. In addition to the improvement in document-related text recognition, it also enhances the general text recognition capability.
PP-OCRv4_mobile_rec Inference Model/Training Model 78.74 5.26 / 1.12 17.48 / 3.61 10.5 The lightweight recognition model of PP-OCRv4 has high inference efficiency and can be deployed on various hardware devices, including edge devices.
PP-OCRv4_server_rec Inference Model/Training Model 85.19 8.75 / 2.49 36.93 / 36.93 173 The server-side model of PP-OCRv4 offers high inference accuracy and can be deployed on various types of servers.
PP-OCRv3_mobile_rec Inference Model/Training Model 72.96 3.89 / 1.16 8.72 / 3.56 10.3 PP-OCRv3’s lightweight recognition model is designed for high inference efficiency and can be deployed on a variety of hardware devices, including edge devices.
ModelModel Download Link Recognition Avg Accuracy(%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Introduction
ch_SVTRv2_rec Inference Model/Training Model 68.81 10.38 / 8.31 66.52 / 30.83 80.5 SVTRv2 is a server text recognition model developed by the OpenOCR team of Fudan University's Visual and Learning Laboratory (FVL). It won the first prize in the PaddleOCR Algorithm Model Challenge - Task One: OCR End-to-End Recognition Task. The end-to-end recognition accuracy on the A list is 6% higher than that of PP-OCRv4.
ModelModel Download Link Recognition Avg Accuracy(%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Introduction
ch_RepSVTR_rec Inference Model/Training Model 65.07 6.29 / 1.57 20.64 / 5.40 48.8 The RepSVTR text recognition model is a mobile text recognition model based on SVTRv2. It won the first prize in the PaddleOCR Algorithm Model Challenge - Task One: OCR End-to-End Recognition Task. The end-to-end recognition accuracy on the B list is 2.5% higher than that of PP-OCRv4, with the same inference speed.
* English Recognition Model
ModelModel Download Link Recognition Avg Accuracy(%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Introduction
en_PP-OCRv5_mobile_rec Inference Model/Training Model 85.25 - - 7.5 The ultra-lightweight English recognition model trained based on the PP-OCRv5 recognition model supports the recognition of English and numbers.
en_PP-OCRv4_mobile_rec Inference Model/Training Model 70.39 4.81 / 1.23 17.20 / 4.18 7.5 The ultra-lightweight English recognition model trained based on the PP-OCRv4 recognition model supports the recognition of English and numbers.
en_PP-OCRv3_mobile_rec Inference Model/Training Model 70.69 3.56 / 0.78 8.44 / 5.78 17.3 The ultra-lightweight English recognition model trained based on the PP-OCRv3 recognition model supports the recognition of English and numbers.
* Multilingual Recognition Model
ModelModel Download Link Recognition Avg Accuracy(%) GPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 CPU Inference Time (ms)
[Normal Mode / High-Performance Mode]		 Model Storage Size (MB) Introduction
korean_PP-OCRv5_mobile_rec Inference Model/Pre-trained Model 90.45 5.43 / 1.46 21.20 / 5.32 14 An ultra-lightweight Korean text recognition model trained based on the PP-OCRv5 recognition framework. Supports Korean, English and numeric text recognition.
latin_PP-OCRv5_mobile_rec Inference Model/Pre-trained Model 84.7 5.43 / 1.46 21.20 / 5.32 14 A Latin-script text recognition model trained based on the PP-OCRv5 recognition framework. Supports most Latin alphabet languages and numeric text recognition.
eslav_PP-OCRv5_mobile_rec Inference Model/Pre-trained Model 85.8 5.43 / 1.46 21.20 / 5.32 14 An East Slavic language recognition model trained based on the PP-OCRv5 recognition framework. Supports East Slavic languages, English and numeric text recognition.
th_PP-OCRv5_mobile_rec Inference Model/Training Model 82.68 - - 7.5 The Thai recognition model trained based on the PP-OCRv5 recognition model supports recognition of Thai, English, and numbers.
el_PP-OCRv5_mobile_rec Inference Model/Training Model 89.28 - - 7.5 The Greek recognition model trained based on the PP-OCRv5 recognition model supports recognition of Greek, English, and numbers.
arabic_PP-OCRv5_mobile_rec Inference Model/Pretrained Model 81.27 - - 7.6 Ultra-lightweight Arabic character recognition model trained based on the PP-OCRv5 recognition model, supports Arabic letters and number recognition
cyrillic_PP-OCRv5_mobile_rec Inference Model/Pretrained Model 80.27 - - 7.7 Ultra-lightweight Cyrillic character recognition model trained based on the PP-OCRv5 recognition model, supports Cyrillic letters and number recognition
devanagari_PP-OCRv5_mobile_rec Inference Model/Pretrained Model 84.96 - - 7.5 Ultra-lightweight Devanagari script recognition model trained based on the PP-OCRv5 recognition model, supports Hindi, Sanskrit and other Devanagari letters, as well as number recognition
te_PP-OCRv5_mobile_rec Inference Model/Pretrained Model 87.65 - - 7.5 Ultra-lightweight Telugu script recognition model trained based on the PP-OCRv5 recognition model, supports Telugu script and number recognition
ta_PP-OCRv5_mobile_rec Inference Model/Pretrained Model 94.2 - - 7.5 Ultra-lightweight Tamil script recognition model trained based on the PP-OCRv5 recognition model, supports Tamil script and number recognition
korean_PP-OCRv3_mobile_rec Inference Model/Training Model 60.21 3.73 / 0.98 8.76 / 2.91 9.6 The ultra-lightweight Korean recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Korean and numbers.
japan_PP-OCRv3_mobile_rec Inference Model/Training Model 45.69 3.86 / 1.01 8.62 / 2.92 9.8 The ultra-lightweight Japanese recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Japanese and numbers.
chinese_cht_PP-OCRv3_mobile_rec Inference Model/Training Model 82.06 3.90 / 1.16 9.24 / 3.18 10.8 The ultra-lightweight Traditional Chinese recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Traditional Chinese and numbers.
te_PP-OCRv3_mobile_rec Inference Model/Training Model 95.88 3.59 / 0.81 8.28 / 6.21 8.7 The ultra-lightweight Telugu recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Telugu and numbers.
ka_PP-OCRv3_mobile_rec Inference Model/Training Model 96.96 3.49 / 0.89 8.63 / 2.77 17.4 The ultra-lightweight Kannada recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Kannada and numbers.
ta_PP-OCRv3_mobile_rec Inference Model/Training Model 76.83 3.49 / 0.86 8.35 / 3.41 8.7 The ultra-lightweight Tamil recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Tamil and numbers.
latin_PP-OCRv3_mobile_rec Inference Model/Training Model 76.93 3.53 / 0.78 8.50 / 6.83 8.7 The ultra-lightweight Latin recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Latin script and numbers.
arabic_PP-OCRv3_mobile_rec Inference Model/Training Model 73.55 3.60 / 0.83 8.44 / 4.69 17.3 The ultra-lightweight Arabic script recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Arabic script and numbers.
cyrillic_PP-OCRv3_mobile_rec Inference Model/Training Model 94.28 3.56 / 0.79 8.22 / 2.76 8.7 The ultra-lightweight cyrillic alphabet recognition model trained based on the PP-OCRv3 recognition model supports the recognition of cyrillic letters and numbers.
devanagari_PP-OCRv3_mobile_rec Inference Model/Training Model 96.44 3.60 / 0.78 6.95 / 2.87 7.9 The ultra-lightweight Devanagari script recognition model trained based on the PP-OCRv3 recognition model supports the recognition of Devanagari script and numbers.
Test Environment Description:
Mode GPU Configuration CPU Configuration Acceleration Technology Combination
Normal Mode FP32 Precision / No TRT Acceleration FP32 Precision / 8 Threads PaddleInference
High-Performance Mode Optimal combination of pre-selected precision types and acceleration strategies FP32 Precision / 8 Threads Pre-selected optimal backend (Paddle/OpenVINO/TRT, etc.)
## III. Quick Integration Before quick integration, you need to install the PaddleX wheel package. For the installation method, please refer to the [PaddleX Local Installation Tutorial](../../../installation/installation.en.md). After installing the wheel package, a few lines of code can complete the inference of the text recognition module. You can switch models under this module freely, and you can also integrate the model inference of the text recognition module into your project. Before running the following code, please download the [demo image](https://paddle-model-ecology.bj.bcebos.com/paddlex/imgs/demo_image/general_ocr_rec_001.png) to your local machine. ```python from paddlex import create_model model = create_model(model_name="PP-OCRv5_server_rec") output = model.predict(input="general_ocr_rec_001.png", batch_size=1) for res in output: res.print() res.save_to_img(save_path="./output/") res.save_to_json(save_path="./output/res.json") ``` Note: The official models would be download from HuggingFace by first. PaddleX also support to specify the preferred source by setting the environment variable `PADDLE_PDX_MODEL_SOURCE`. The supported values are `huggingface`, `aistudio`, `bos`, and `modelscope`. For example, to prioritize using `bos`, set: `PADDLE_PDX_MODEL_SOURCE="bos"`. For more information on using PaddleX's single-model inference APIs, please refer to the [PaddleX Single-Model Python Script Usage Instructions](../../instructions/model_python_API.en.md). After running, the result obtained is: ```bash {'res': {'input_path': 'general_ocr_rec_001.png', 'page_index': None, 'rec_text': '绿洲仕格维花园公寓', 'rec_score': 0.9823867082595825}} ```` The meanings of the running results parameters are as follows: - `input_path`：Represents the path to the image of the text line to be predicted. - `page_index`：If the input is a PDF file, this indicates the current page number of the PDF. Otherwise, it is `None` - `rec_text`：Represents the predicted text of the text line image. - `rec_score`：Represents the confidence score of the predicted text line image. The visualized image is as follows: The explanations for the methods, parameters, etc., are as follows: * The `create_model` instantiates the text recognition model (here, `PP-OCRv4_mobile_rec` is taken as an example), and the specific instructions are as follows:
Parameter Parameter Description Parameter Type Options Default Value
model_name Name of the model str All model names supported by PaddleX None
model_dir Path to store the model str None None
device The device used for model inference str It supports specifying specific GPU card numbers, such as "gpu:0", other hardware card numbers, such as "npu:0", or CPU, such as "cpu". gpu:0
use_hpip Whether to enable the high-performance inference plugin bool None False
hpi_config High-performance inference configuration dict | None None None
* The `model_name` must be specified. After specifying `model_name`, the default model parameters built into PaddleX are used. If `model_dir` is specified, the user-defined model is used. * The `predict()` method of the formula recognition model is called for inference prediction. The `predict()` method has parameters `input` and `batch_size`, which are explained as follows:
Parameter Parameter Description Parameter Type Options Default Value
input Data to be predicted, supporting multiple input types Python Var/str/list
  • Python variable, such as image data represented by numpy.ndarray
  • File path, such as the local path of an image file: /root/data/img.jpg
  • URL link, such as the network URL of an image file: Example
  • Local directory, the directory should contain data files to be predicted, such as the local path: /root/data/
  • List, elements of the list must be of the above types of data, such as [numpy.ndarray, numpy.ndarray], ["/root/data/img1.jpg", "/root/data/img2.jpg"], ["/root/data1", "/root/data2"], [{"img": "/root/data1"}, {"img": "/root/data2/img.jpg"}]
 None
batch_size Batch size int Any integer 1
* Process the prediction results. The prediction result for each sample is of `dict` type, and supports operations such as printing, saving as an image, and saving as a `json` file:
Method Method Description Parameter Parameter Type Parameter Description Default Value
print Print the result to the terminal format_json bool Whether to format the output content using json indentation True
indent int JSON formatting setting, only effective when format_json is True 4
ensure_ascii bool JSON formatting setting, only effective when format_json is True False
save_to_json Save the result as a JSON file save_path str The path where the file is saved. If it is a directory, the saved file name is consistent with the input file name None
indent int JSON formatting setting 4
ensure_ascii bool JSON formatting setting False
save_to_img Save the result as an image file save_path str The path where the file is saved. If it is a directory, the saved file name is consistent with the input file name None
* Additionally, it supports obtaining the visualization image with results and the prediction results through attributes, as follows:
Attribute Attribute Description
json Get the prediction result in json format
img Get the visualization image in dict format
For more information on using PaddleX's single-model inference API, refer to the [PaddleX Single Model Python Script Usage Instructions](../../instructions/model_python_API.en.md). ## IV. Custom Development If you are seeking higher accuracy from existing models, you can use PaddleX's custom development capabilities to develop better text recognition models. Before using PaddleX to develop text recognition models, please ensure that you have installed the relevant model training plugins for OCR in PaddleX. The installation process can be found in the custom development section of the [PaddleX Local Installation Guide](../../../installation/installation.en.md). ### 4.1 Data Preparation Before model training, it is necessary to prepare the corresponding dataset for each task module. PaddleX provides a data validation function for each module, and only data that passes the validation can be used for model training. Additionally, PaddleX offers Demo datasets for each module, allowing you to complete subsequent development based on the officially provided Demo data. If you wish to use a private dataset for subsequent model training, you can refer to the [PaddleX Text Detection/Text Recognition Task Module Data Annotation Tutorial](../../../data_annotations/ocr_modules/text_detection_recognition.en.md). #### 4.1.1 Download Demo Data You can use the following commands to download the Demo dataset to a specified folder: ```bash wget https://paddle-model-ecology.bj.bcebos.com/paddlex/data/ocr_rec_dataset_examples.tar -P ./dataset tar -xf ./dataset/ocr_rec_dataset_examples.tar -C ./dataset/ ``` #### 4.1.2 Data Validation A single command can complete data validation: ```bash python main.py -c paddlex/configs/modules/text_recognition/PP-OCRv4_mobile_rec.yaml \ -o Global.mode=check_dataset \ -o Global.dataset_dir=./dataset/ocr_rec_dataset_examples ``` After executing the above command, PaddleX will validate the dataset and summarize its basic information. If the command runs successfully, it will print `Check dataset passed !` in the log. The validation results file is saved in `./output/check_dataset_result.json`, and related outputs are saved in the `./output/check_dataset` directory in the current directory, including visual examples of sample images and sample distribution histograms.
👉 Validation Result Details (Click to Expand)

The specific content of the validation result file is:


{
  "done_flag": true,
  "check_pass": true,
  "attributes": {
    "train_samples": 4468,
    "train_sample_paths": [
      "check_dataset\/demo_img\/train_word_1.png",
      "check_dataset\/demo_img\/train_word_2.png",
      "check_dataset\/demo_img\/train_word_3.png",
      "check_dataset\/demo_img\/train_word_4.png",
      "check_dataset\/demo_img\/train_word_5.png",
      "check_dataset\/demo_img\/train_word_6.png",
      "check_dataset\/demo_img\/train_word_7.png",
      "check_dataset\/demo_img\/train_word_8.png",
      "check_dataset\/demo_img\/train_word_9.png",
      "check_dataset\/demo_img\/train_word_10.png"
    ],
    "val_samples": 2077,
    "val_sample_paths": [
      "check_dataset\/demo_img\/val_word_1.png",
      "check_dataset\/demo_img\/val_word_2.png",
      "check_dataset\/demo_img\/val_word_3.png",
      "check_dataset\/demo_img\/val_word_4.png",
      "check_dataset\/demo_img\/val_word_5.png",
      "check_dataset\/demo_img\/val_word_6.png",
      "check_dataset\/demo_img\/val_word_7.png",
      "check_dataset\/demo_img\/val_word_8.png",
      "check_dataset\/demo_img\/val_word_9.png",
      "check_dataset\/demo_img\/val_word_10.png"
    ]
  },
  "analysis": {
    "histogram": "check_dataset\/histogram.png"
  },
  "dataset_path": "ocr_rec_dataset_examples",
  "show_type": "image",
  "dataset_type": "MSTextRecDataset"
}

In the above validation result, check_pass being true indicates that the dataset format meets the requirements. Explanations for other indicators are as follows:

#### 4.1.3 Dataset Format Conversion/Dataset Splitting (Optional) After completing data validation, you can convert the dataset format or re-split the training/validation ratio of the dataset by modifying the configuration file or appending hyperparameters.
👉 Dataset Format Conversion/Dataset Splitting Details (Click to Expand)

(1) Dataset Format Conversion

Text recognition does not currently support data conversion.

(2) Dataset Splitting

The parameters for dataset splitting can be set by modifying the CheckDataset section in the configuration file. Examples of some parameters in the configuration file are as follows:

......
CheckDataset:
  ......
  split:
    enable: True
    train_percent: 90
    val_percent: 10
  ......

Then execute the command:

python main.py -c paddlex/configs/modules/text_recognition/PP-OCRv4_mobile_rec.yaml \
    -o Global.mode=check_dataset \
    -o Global.dataset_dir=./dataset/ocr_rec_dataset_examples

After data splitting, the original annotation files will be renamed to xxx.bak in the original path.

The above parameters also support setting through appending command line arguments:

python main.py -c paddlex/configs/modules/text_recognition/PP-OCRv4_mobile_rec.yaml \
    -o Global.mode=check_dataset \
    -o Global.dataset_dir=./dataset/ocr_rec_dataset_examples \
    -o CheckDataset.split.enable=True \
    -o CheckDataset.split.train_percent=90 \
    -o CheckDataset.split.val_percent=10
### 4.2 Model Training Model training can be completed with a single command. Here's an example of training the PP-OCRv4 mobile text recognition model (PP-OCRv4_mobile_rec): ```bash python main.py -c paddlex/configs/modules/text_recognition/PP-OCRv4_mobile_rec.yaml \ -o Global.mode=train \ -o Global.dataset_dir=./dataset/ocr_rec_dataset_examples ``` The steps required are: * Specify the path to the model's `.yaml` configuration file (here it's `PP-OCRv4_mobile_rec.yaml`,When training other models, you need to specify the corresponding configuration files. The relationship between the model and configuration files can be found in the [PaddleX Model List (CPU/GPU)](../../../support_list/models_list.en.md)) * Specify the mode as model training: `-o Global.mode=train` * Specify the path to the training dataset: `-o Global.dataset_dir`. * Other related parameters can be set by modifying the `Global` and `Train` fields in the `.yaml` configuration file or adjusted by appending parameters in the command line. For example, to specify training on the first 2 GPUs: `-o Global.device=gpu:0,1`; to set the number of training epochs to 10: `-o Train.epochs_iters=10`. For more modifiable parameters and their detailed explanations, refer to the [PaddleX Common Configuration File Parameters](../../instructions/config_parameters_common.en.md). * New Feature: Paddle 3.0 support CINN (Compiler Infrastructure for Neural Networks) to accelerate training speed when using GPU device. Please specify `-o Train.dy2st=True` to enable it.
👉 More Information (Click to Expand)
## 4.3 Model Evaluation After completing model training, you can evaluate the specified model weights file on the validation set to verify the model's accuracy. Using PaddleX for model evaluation can be done with a single command: ```bash python main.py -c paddlex/configs/modules/text_recognition/PP-OCRv4_mobile_rec.yaml \ -o Global.mode=evaluate \ -o Global.dataset_dir=./dataset/ocr_rec_dataset_examples ``` Similar to model training, the following steps are required: * Specify the `.yaml` configuration file path for the model (here it's `PP-OCRv4_mobile_rec.yaml`) * Specify the mode as model evaluation: `-o Global.mode=evaluate` * Specify the path to the validation dataset: `-o Global.dataset_dir` Other related parameters can be set by modifying the `Global` and `Evaluate` fields in the `.yaml` configuration file. For details, refer to [PaddleX Common Model Configuration File Parameter Description](../../instructions/config_parameters_common.en.md).
👉 More Information (Click to Expand)

When evaluating the model, you need to specify the model weights file path. Each configuration file has a default weight save path. If you need to change it, simply append the command line parameter to set it, such as -o Evaluate.weight_path=./output/best_model/best_model.pdparams.

After completing the model evaluation, an evaluate_result.json file will be produced, which records the evaluation results, specifically, whether the evaluation task was completed successfully and the model's evaluation metrics, including acc、norm_edit_dis；

### 4.4 Model Inference and Model Integration After completing model training and evaluation, you can use the trained model weights for inference prediction or Python integration. #### 4.4.1 Model Inference To perform inference prediction via the command line, simply use the following command: Before running the following code, please download the [demo image](https://paddle-model-ecology.bj.bcebos.com/paddlex/imgs/demo_image/general_ocr_rec_001.png) to your local machine. ```bash python main.py -c paddlex/configs/modules/text_recognition/PP-OCRv4_mobile_rec.yaml \ -o Global.mode=predict \ -o Predict.model_dir="./output/best_accuracy/inference" \ -o Predict.input="general_ocr_rec_001.png" ``` Similar to model training and evaluation, the following steps are required: * Specify the `.yaml` configuration file path for the model (here it is `PP-OCRv4_mobile_rec.yaml`) * Specify the mode as model inference prediction: `-o Global.mode=predict` * Specify the model weights path: `-o Predict.model_dir="./output/best_accuracy/inference"` * Specify the input data path: `-o Predict.input="..."` Other related parameters can be set by modifying the `Global` and `Predict` fields in the `.yaml` configuration file. For details, refer to [PaddleX Common Model Configuration File Parameter Description](../../instructions/config_parameters_common.en.md). #### 4.4.2 Model Integration Models can be directly integrated into the PaddleX pipelines or into your own projects. 1.Pipeline Integration The text recognition module can be integrated into PaddleX pipelines such as the [General OCR Pipeline](../../../pipeline_usage/tutorials/ocr_pipelines/OCR.en.md), [General Table Recognition Pipeline](../../../pipeline_usage/tutorials/ocr_pipelines/table_recognition.en.md), and [Document Scene Information Extraction Pipeline v3 (PP-ChatOCRv3-doc)](../../../pipeline_usage/tutorials/information_extraction_pipelines/document_scene_information_extraction_v3.en.md). Simply replace the model path to update the text recognition module of the relevant pipeline. 2.Module Integration The weights you produce can be directly integrated into the text recognition module. Refer to the [Quick Integration](#iii-quick-integration) Python example code. Simply replace the model with the path to your trained model. You can also use the PaddleX high-performance inference plugin to optimize the inference process of your model and further improve efficiency. For detailed procedures, please refer to the [PaddleX High-Performance Inference Guide](../../../pipeline_deploy/high_performance_inference.en.md).