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# PP-OCRv3 微信小程序部署示例
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本节介绍部署PaddleOCR的PP-OCRv3模型在微信小程序中运行,以及@paddle-js-models/ocr npm包中的js接口。
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## 微信小程序部署PP-OCRv3模型
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PP-OCRv3模型部署到微信小程序参考[文档](../../../../application/js/mini_program)
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## PP-OCRv3 js接口
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```
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import * as ocr from "@paddle-js-models/ocr";
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await ocr.init(detConfig, recConfig);
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const res = await ocr.recognize(img, option, postConfig);
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```
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ocr模型加载和初始化,其中模型为Paddle.js模型格式,js模型转换方式参考[文档](../../../../application/web_demo/README.md)
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**init函数参数**
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> * **detConfig**(dict): 文本检测模型配置参数,默认值为 {modelPath: 'https://js-models.bj.bcebos.com/PaddleOCR/PP-OCRv3/ch_PP-OCRv3_det_infer_js_960/model.json', fill: '#fff', mean: [0.485, 0.456, 0.406],std: [0.229, 0.224, 0.225]}; 其中,modelPath为文本检测模型路径,fill 为图像预处理padding的值,mean和std分别为预处理的均值和标准差
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> * **recConfig**(dict)): 文本识别模型配置参数,默认值为 {modelPath: 'https://js-models.bj.bcebos.com/PaddleOCR/PP-OCRv3/ch_PP-OCRv3_rec_infer_js/model.json', fill: '#000', mean: [0.5, 0.5, 0.5], std: [0.5, 0.5, 0.5]}; 其中,modelPath为文本检测模型路径,fill 为图像预处理padding的值,mean和std分别为预处理的均值和标准差
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**recognize函数参数**
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> * **img**(HTMLImageElement): 输入图像参数,类型为HTMLImageElement。
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> * **option**(dict): 可视化文本检测框的canvas参数,可不用设置。
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> * **postConfig**(dict): 文本检测后处理参数,默认值为:{shape: 960, thresh: 0.3, box_thresh: 0.6, unclip_ratio:1.5}; thresh是输出预测图的二值化阈值;box_thresh是输出框的阈值,低于此值的预测框会被丢弃,unclip_ratio是输出框扩大的比例。
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## 其它文档
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- [PP-OCR 系列模型介绍](../../)
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- [PP-OCRv3 C++部署](../cpp)
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- [模型预测结果说明](../../../../../docs/api/vision_results/)
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- [如何切换模型推理后端引擎](../../../../../docs/cn/faq/how_to_change_backend.md)
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- [PP-OCRv3模型web demo文档](../../../../application/web_demo/README.md)
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