# Cracking 12306
基于深度学习的12306登录验证码破解。单类别验证通过率约95%,双类别验证通过率约90%。
![](captcha_imgs/double.jpg)
![](captcha_imgs/pred.png)
### Requirements
* tensorflow >= 2.1.0
* opencv
* numpy
如果需使用Jupyter进行可视化交互,还需要:
* matplotlib
如果需开启数据标注服务器,还需要:
* flask
* flask_compress
如果需自行进行训练,还需要:
* tqdm >= 4.43.0
### 文件结构
```
Cracking-12306/
├── bootstrap.py 自举代码
├── Captcha-Interaction-Test.ipynb 与12306网站的交互识别
├── constants.py 训练相关参数
├── h5/ 最终模型
├── helpers/ 一些用到过的小工具代码
│ ├── generate_text_dataset.py
│ ├── generate_text_datasetV2.py
│ ├── generate_text_npz.py
│ ├── gen_imgtagger_html.py
│ ├── numeric.py *计算均值方差协方差并PCA
│ ├── original2real.py
│ ├── original_label.txt
│ ├── predict_need_tagged.py
│ ├── renamedir.py
│ ├── rename.py
│ ├── split_train_5fold.py *将数据依类别等比例地划分为五份
│ ├── split_traintest.py
│ └── split_traintestV2.py
├── image_recognition_12306.ipynb 用于colab的部署,token已失效
├── metadata
│ ├── label_to_content.txt 类别名称与编号的映射
│ ├── test_label1.txt 1号测试集
│ ├── test_label2.txt
│ ├── test_label3.txt
│ ├── test_label4.txt
│ ├── test_label5.txt
│ ├── train_label1.txt 1号训练集,内容为2345号测试集的并
│ ├── train_label2.txt
│ ├── train_label3.txt
│ ├── train_label4.txt
│ ├── train_label5.txt
├── models
│ ├── ResNet_SE.py SeNet的实现
│ ├── ResNetV2.py ResNet的实现(第二版)
│ └── ResNetV2_text.py 用于文字识别的ResNet
├── net
│ ├── fetch_images.py 不断爬取图片,保存所有置信度较低的图
│ ├── image_retagger.py 图片类别标注Web服务器
│ └── templates/ 标注服务器相关html
│ ├── captcha_frame.html
│ └── index.html
├── test.py
├── test_single_img.py
├── text/ 文字识别模块相关
│ ├── net/ 网络相关,类似图片识别模块的net/
│ ├── text_image_exploring.ipynb 文字图片预处理的实验用notebook
│ └── textimg_preprocessing.ipynb
├── train.py 训练图像分类模型
├── train_text.py 训练文字识别模型
└── utils
├── data.py 图像数据读取与Data Augmentation
└── utils.py 其他工具函数
```
## 使用
### 预测一张图片
请直接使用`./Captcha-Interaction-Test.ipynb`进行交互,相关接口调用方式也在其中。
### 训练图片分类器
请将数据保存在`archive/`目录下,每个类别一个目录,目录名称参阅`metadata/label_to_content.txt`。
```sh
$ python train.py
```
### 训练文字识别器
```sh
$ python train_text.py
```
## 验证码识别流程
首先在指定位置提取文字部分,如果是双类别,那么垂直边沿会有一个明显的突变,此处使用Y方向Sobel算子进行边缘检测,如果探测到边缘,说明是双类别图像,在边缘处进行切割;否则,视为单类别图像。由于单类别图像没有背景,因此探测有像素的最后一列并基于此裁剪。
将切割出的图片送给文字识别模型进行预测,得到预测结果。
切割验证码中的8个图片,送给图片分类模型进行预测,得到预测结果。
### 文字识别
由于文字输入大小不一,裁剪后统一缩放到57x57,使用双线性插值,交由模型进行预测。
### 图片预测
对于每一张图片,裁剪四个角与正中央指定大小的正方形区域,得到5张图,原图水平翻转后以同样的方法又得到5张图。于是一共有10张图片,将由5个不同的模型进行独立预测,最终得到50个预测值,求算术平均。
## 训练流程
由于图片数据集非常少,再分训练集与测试集非常难受,因此采用5-fold,训练集分为5份,训练5个不同的模型:1号模型使用第1份做测试集,其余做测试集,以此类推。每个模型独立训练,各自调参,最后进行继承。
5个模型中,主要包括ReNet与SeNet。
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