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# 前端AI应用 | ||
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人工智能技术的快速发展带动了计算机视觉、自然语言处理领域的产业升级。另外,随着PC和移动设备上算力的稳步增强、模型压缩技术迭代更新以及各种创新需求的不断催生,在浏览器中部署AI模型实现前端智能已经具备了良好的基础条件。 | ||
针对前端部署AI深度学习模型困难的问题,百度开源了Paddle.js前端深度学习模型部署框架,可以很容易的将深度学习模型部署到前端项目中。 | ||
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## Paddle.js简介 | ||
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[Paddle.js](https://github.com/PaddlePaddle/Paddle.js)是百度`PaddlePaddle`的web方向子项目,是一个运行在浏览器中的开源深度学习框架。`Paddle.js`可以加载`PaddlePaddle`动转静的模型,经过`Paddle.js`的模型转换工具`paddlejs-converter`转换成浏览器友好的模型,易于在线推理预测使用。`Paddle.js`支持`WebGL/WebGPU/WebAssembly`的浏览器中运行,也可以在百度小程序和微信小程序环境下运行。 | ||
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简言之,利用Paddle.js,我们可以在浏览器、小程序等前端应用场景上线AI功能,包括但不限于目标检测,图像分割,OCR,物品分类等AI能力。 | ||
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## Paddle.js Web Demo使用 | ||
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在浏览器中直接运行官方demo参考[文档](./web_demo/README.md) | ||
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## Paddle.js 小程序Demo使用 | ||
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在微信小程序运行官方demo参考[文档](./mini_program/README.md) | ||
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# Paddle.js微信小程序Demo | ||
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- [1.介绍](#1) | ||
- [2. 项目启动](#2) | ||
* [2.1 准备工作](#21) | ||
* [2.2 启动步骤](#22) | ||
* [2.3 效果展示](#23) | ||
- [3. Paddle.js 框架推理](#3) | ||
- [4. 常见问题](#4) | ||
- [5. 其他](#5) | ||
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<a name="1"></a> | ||
## 1.介绍 | ||
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本目录下包含文本检测、文本识别小程序demo,通过使用 [Paddle.js](https://github.com/PaddlePaddle/Paddle.js) 以及 [Paddle.js微信小程序插件](https://mp.weixin.qq.com/wxopen/plugindevdoc?appid=wx7138a7bb793608c3&token=956931339&lang=zh_CN) 完成在小程序上利用用户终端算力实现文本检测框选效果。 | ||
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<a name="2"></a> | ||
## 2. 项目启动 | ||
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<a name="21"></a> | ||
### 2.1 准备工作 | ||
* [申请微信小程序账号](https://mp.weixin.qq.com/) | ||
* [微信小程序开发者工具](https://developers.weixin.qq.com/miniprogram/dev/devtools/download.html) | ||
* 前端开发环境准备:node、npm | ||
* 小程序管理后台配置服务器域名,或打开开发者工具【不校验合法域名】 | ||
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详情参考:https://mp.weixin.qq.com/wxamp/devprofile/get_profile?token=1132303404&lang=zh_CN) | ||
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<a name="22"></a> | ||
### 2.2 启动步骤 | ||
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#### **1. clone Demo代码** | ||
```sh | ||
git clone https://github.com/PaddlePaddle/FastDeploy | ||
cd FastDeploy/examples/application/js/mini_program | ||
``` | ||
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#### **2. 进入小程序目录,安装依赖** | ||
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```sh | ||
# 运行文本识别demo,进入到ocrXcx目录 | ||
cd ./ocrXcx && npm install | ||
# 运行文本检测demo,进入到ocrdetectXcx目录 | ||
# cd ./ocrdetectXcx && npm install | ||
``` | ||
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#### **3. 微信小程序导入代码** | ||
打开微信开发者工具 --> 导入 --> 选定目录,输入相关信息 | ||
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#### **4. 添加 Paddle.js微信小程序插件** | ||
小程序管理界面 --> 设置 --> 第三方设置 --> 插件管理 --> 添加插件 --> 搜索 `wx7138a7bb793608c3` 并添加 | ||
[参考文档](https://developers.weixin.qq.com/miniprogram/dev/framework/plugin/using.html) | ||
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#### **5. 构建依赖** | ||
点击开发者工具中的菜单栏:工具 --> 构建 npm | ||
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原因:node_modules 目录不会参与编译、上传和打包中,小程序想要使用 npm 包必须走一遍“构建 npm”的过程,构建完成会生成一个 miniprogram_npm 目录,里面会存放构建打包后的 npm 包,也就是小程序真正使用的 npm 包。* | ||
[参考文档](https://developers.weixin.qq.com/miniprogram/dev/devtools/npm.html) | ||
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<a name="23"></a> | ||
### 2.3 效果展示 | ||
![image](https://user-images.githubusercontent.com/43414102/157648579-cdbbee61-9866-4364-9edd-a97ac0eda0c1.png) | ||
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<a name="3"></a> | ||
## 3. Paddle.js 框架推理 | ||
```typescript | ||
// 引入 paddlejs 和 paddlejs-plugin,注册小程序环境变量和合适的 backend | ||
import * as paddlejs from '@paddlejs/paddlejs-core'; | ||
import '@paddlejs/paddlejs-backend-webgl'; | ||
const plugin = requirePlugin('paddlejs-plugin'); | ||
plugin.register(paddlejs, wx); | ||
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// 初始化推理引擎 | ||
const runner = new paddlejs.Runner({modelPath, feedShape, mean, std}); | ||
await runner.init(); | ||
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// 获取图像信息 | ||
wx.canvasGetImageData({ | ||
canvasId: canvasId, | ||
x: 0, | ||
y: 0, | ||
width: canvas.width, | ||
height: canvas.height, | ||
success(res) { | ||
// 推理预测 | ||
runner.predict({ | ||
data: res.data, | ||
width: canvas.width, | ||
height: canvas.height, | ||
}, function (data) { | ||
// 获取推理结果 | ||
console.log(data) | ||
}); | ||
} | ||
}); | ||
``` | ||
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<a name="4"></a> | ||
## 4. 常见问题 | ||
### 4.1 出现报错 `Invalid context type [webgl2] for Canvas#getContext` | ||
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可以不管,不影响正常代码运行和demo功能 | ||
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### 4.2 预览 看不到结果 | ||
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建议尝试真机调试 | ||
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### 4.3 微信开发者工具出现黑屏,然后出现超多报错 | ||
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重启微信开发者工具 | ||
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### 4.4 模拟和真机调试结果不一致;模拟检测不到文本等 | ||
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可以以真机为准; | ||
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模拟检测不到文本等可以尝试随意改动下代码(增删换行等)再点击编译 | ||
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### 4.5 手机调试或运行时出现 长时间无反应等提示 | ||
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请继续等待,模型推理需要一定时间 | ||
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<a name="5"></a> | ||
## 5. 其他 | ||
* [详细文档](https://mp.weixin.qq.com/s/KBjXawSfBreUCsIYbUgF-w) |
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# OCR 微信小程序代码示例 | ||
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- [1.介绍](#1) | ||
- [2. 项目启动](#2) | ||
* [2.1 准备工作](#21) | ||
* [2.2 启动步骤](#22) | ||
* [2.3 效果展示](#23) | ||
- [3. Paddle.js 框架推理](#3) | ||
- [4. 常见问题](#4) | ||
- [5. 其他](#5) | ||
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<a name="1"></a> | ||
## 1.介绍 | ||
本目录为文本识别小程序代码,通过使用 [Paddle.js](https://github.com/PaddlePaddle/Paddle.js) 以及 [Paddle.js微信小程序插件](https://mp.weixin.qq.com/wxopen/plugindevdoc?appid=wx7138a7bb793608c3&token=956931339&lang=zh_CN) 完成在小程序上利用用户终端算力实现文本检测框选效果。 | ||
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<a name="2"></a> | ||
## 2. 项目启动 | ||
|
||
<a name="21"></a> | ||
### 2.1 准备工作 | ||
* [申请微信小程序账号](https://mp.weixin.qq.com/) | ||
* [微信小程序开发者工具](https://developers.weixin.qq.com/miniprogram/dev/devtools/download.html) | ||
* 前端开发环境准备:node、npm | ||
* 小程序管理后台配置服务器域名,或打开开发者工具【不校验合法域名】 | ||
|
||
详情参考:https://mp.weixin.qq.com/wxamp/devprofile/get_profile?token=1132303404&lang=zh_CN) | ||
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<a name="22"></a> | ||
### 2.2 启动步骤 | ||
#### **1. clone Paddle.js** | ||
```sh | ||
git clone https://github.com/PaddlePaddle/FastDeploy | ||
cd FastDeploy/examples/application/web_demo/examples/ | ||
``` | ||
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#### **2. 进入 ocrXcx 目录,安装依赖** | ||
```sh | ||
cd ./ocrXcx && npm install | ||
``` | ||
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#### **3. 微信小程序导入代码** | ||
打开微信开发者工具 --> 导入 --> 选定目录,输入相关信息 | ||
|
||
#### **4. 添加 Paddle.js微信小程序插件** | ||
小程序管理界面 --> 设置 --> 第三方设置 --> 插件管理 --> 添加插件 --> 搜索 `wx7138a7bb793608c3` 并添加 | ||
[参考文档](https://developers.weixin.qq.com/miniprogram/dev/framework/plugin/using.html) | ||
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#### **5. 构建依赖** | ||
点击开发者工具中的菜单栏:工具 --> 构建 npm | ||
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||
原因:node_modules 目录不会参与编译、上传和打包中,小程序想要使用 npm 包必须走一遍“构建 npm”的过程,构建完成会生成一个 miniprogram_npm 目录,里面会存放构建打包后的 npm 包,也就是小程序真正使用的 npm 包。* | ||
[参考文档](https://developers.weixin.qq.com/miniprogram/dev/devtools/npm.html) | ||
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<a name="23"></a> | ||
### 2.3 效果展示 | ||
![image](https://user-images.githubusercontent.com/43414102/157648579-cdbbee61-9866-4364-9edd-a97ac0eda0c1.png) | ||
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<a name="3"></a> | ||
## 3. Paddle.js 框架推理 | ||
```typescript | ||
// 引入 paddlejs 和 paddlejs-plugin,注册小程序环境变量和合适的 backend | ||
import * as paddlejs from '@paddlejs/paddlejs-core'; | ||
import '@paddlejs/paddlejs-backend-webgl'; | ||
const plugin = requirePlugin('paddlejs-plugin'); | ||
plugin.register(paddlejs, wx); | ||
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// 初始化推理引擎 | ||
const runner = new paddlejs.Runner({modelPath, feedShape, mean, std}); | ||
await runner.init(); | ||
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// 获取图像信息 | ||
wx.canvasGetImageData({ | ||
canvasId: canvasId, | ||
x: 0, | ||
y: 0, | ||
width: canvas.width, | ||
height: canvas.height, | ||
success(res) { | ||
// 推理预测 | ||
runner.predict({ | ||
data: res.data, | ||
width: canvas.width, | ||
height: canvas.height, | ||
}, function (data) { | ||
// 获取推理结果 | ||
console.log(data) | ||
}); | ||
} | ||
}); | ||
``` | ||
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<a name="4"></a> | ||
## 4. 常见问题 | ||
### 4.1 出现报错 `Invalid context type [webgl2] for Canvas#getContext` | ||
|
||
可以不管,不影响正常代码运行和demo功能 | ||
|
||
### 4.2 预览 看不到结果 | ||
|
||
建议尝试真机调试 | ||
|
||
### 4.3 微信开发者工具出现黑屏,然后出现超多报错 | ||
|
||
重启微信开发者工具 | ||
|
||
### 4.4 模拟和真机调试结果不一致;模拟检测不到文本等 | ||
|
||
可以以真机为准; | ||
|
||
模拟检测不到文本等可以尝试随意改动下代码(增删换行等)再点击编译 | ||
|
||
|
||
### 4.5 手机调试或运行时出现 长时间无反应等提示 | ||
|
||
请继续等待,模型推理需要一定时间 | ||
|
||
<a name="5"></a> | ||
## 5. 其他 | ||
* [详细文档](https://mp.weixin.qq.com/s/KBjXawSfBreUCsIYbUgF-w) |
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/* global wx, App */ | ||
import * as paddlejs from '@paddlejs/paddlejs-core'; | ||
import '@paddlejs/paddlejs-backend-webgl'; | ||
// eslint-disable-next-line no-undef | ||
const plugin = requirePlugin('paddlejs-plugin'); | ||
plugin.register(paddlejs, wx); | ||
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App({ | ||
globalData: { | ||
Paddlejs: paddlejs.Runner | ||
} | ||
}); |
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{ | ||
"pages": [ | ||
"pages/index/index" | ||
], | ||
"plugins": { | ||
"paddlejs-plugin": { | ||
"version": "2.0.1", | ||
"provider": "wx7138a7bb793608c3" | ||
} | ||
}, | ||
"sitemapLocation": "sitemap.json" | ||
} |
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examples/application/js/mini_program/ocrXcx/package-lock.json
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{ | ||
"name": "paddlejs-demo", | ||
"version": "0.0.1", | ||
"description": "", | ||
"main": "app.js", | ||
"dependencies": { | ||
"@paddlejs/paddlejs-backend-webgl": "^1.2.0", | ||
"@paddlejs/paddlejs-core": "^2.1.18", | ||
"d3-polygon": "2.0.0", | ||
"js-clipper": "1.0.1", | ||
"number-precision": "1.5.2" | ||
}, | ||
"scripts": { | ||
"test": "echo \"Error: no test specified\" && exit 1" | ||
}, | ||
"keywords": [], | ||
"author": "", | ||
"license": "ISC" | ||
} |
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