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PaddleOCRSarp是一个基于百度飞桨PaddleOCR的C++代码修改并封装的.NET的OCR工具类库。包含文本识别、文本检测、表格识别功能。本项目针对小图识别不准的情况下做了优化,比飞桨原代码识别准确率有所提高。 包含总模型仅8.6M的超轻量级中文OCR,单模型支持中英文数字组合识别、竖排文本识别、长文本识别。同时支持多种文本检测。

License: Apache License 2.0

C++ 23.24% C# 68.67% Go 1.52% Batchfile 0.06% Python 6.51%

paddleocrsharp's Introduction

简体中文 | English |更新记录

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介绍


PaddleOCRSharp 是一个基于百度飞桨PaddleOCR的.NET版本OCR工具类库。项目核心组件PaddleOCR.dll,由C++编写,根据百度飞桨PaddleOCR的C++代码修改并优化而成。目前已经支持C++、.NET、Python、Golang、Rust等开发语言的直接API接口调用。项目包含文本识别、文本检测、表格识别功能。本项目针对小图识别不准的情况下做了优化,比飞桨原代码识别准确率有所提高。包含总模型仅8.6M的超轻量级中文OCR,单模型支持中英文数字组合识别、竖排文本识别、长文本识别。同时支持中英文、纯英文以及多种语言文本检测识别。

PaddleOCRSharp封装极其简化,实际调用仅几行代码,极大的方便了中下游开发者的使用和降低了PaddleOCR的使用入门级别,同时提供不同的.NET框架使用,方便各个行业应用开发与部署。Nuget包即装即用,可以离线部署,不需要网络就可以识别的高精度中英文OCR。

本项目支持官方所有公开的通用OCR模型,PPOCRV2、PPOCRV3、PPOCRV4。 如果使用v2模型,请设置OCR识别参数OCRParameter对象的属性rec_img_h=32,本项目默认使用V3模型,默认rec_img_h=48:

本项目只能在X64的CPU上编译和使用,只能在avx指令集上的CPU上使用。

本项目目前支持以下.NET框架:

net35;net40;net45;net451;net452;net46;net461;net462;net47;net471;net472;net48;net481;
netstandard2.0;netcoreapp3.1;
net5.0;net6.0;net7.0;net8.0

本项目提供了两个SDK,一个是C++版本,一个是.net版本,.net版本是对C++版本的二次封装,其他语言开发亦是调用C++版本。同时也提供了Go、Python、C++的调用示例代码

1.文件夹结构

PaddleOCRSharp               //该文件夹包含.NET对PaddleOCR封装类库项目
PaddleOCRDemo                //该文件夹包含OCR示例Demo文件夹
|--PaddleOCRCppDemo          //C++调用示例项目
|--PaddleOCRSharpDemo        //.NET调用示例项目
|--python                    //python调用示例项目
|--Go                       //Golang调用示例项目

2. .NET版编译

.NET版编译

使用与部署


1. 在C++中使用PaddleOCR

C++使用PaddleOCR

2. .NET使用PaddleOCRSharp

.NET使用PaddleOCRSharp

3. python使用PaddleOCR.dll

python使用PaddleOCR.dll

4. Golang使用PaddleOCR.dll

Golang使用PaddleOCR.dll

5. Rust使用PaddleOCR.dll

Rust使用PaddleOCR.dll参考地址

模型


OCR识别模型库支持官方所有的模型,也支持自己训练的模型。完全按照飞桨OCR接口搭桥。 本项目部署自带的一种轻量版8.6M模型库、服务器版模型库(更准确,需要自行下载),可以自行更改模型库适用实际需求。

模型名称 模型大小 下载地址 备注
ch_PP-OCRv2 10M 中英文轻量v2
en_PP-OCRv2 4M 英文数字v2
ch_PP-OCRv3 12M 中英文轻量v3
en_PP-OCRv3 10M 英文数字v3
ch_PP-OCRv4 14M 中英文轻量v4
en_PP-OCRv4 12M 英文数字v4

更多PaddleOCR模型下载地址

如果需要修改成服务器版模型库,参考代码如下:(假设服务器版模型库在运行目录的文件夹inferenceserver下)


  //自带轻量版中英文模型PP-OCRv4
  OCRModelConfig config = null;

 //服务器中英文模型v2
 OCRModelConfig config = new OCRModelConfig();
 string root = PaddleOCRSharp.EngineBase.GetRootDirectory();
 string modelPathroot = root + @"\inferenceserver";
 config.det_infer = modelPathroot + @"\ch_ppocr_server_v2.0_det_infer";
 config.cls_infer = modelPathroot + @"\ch_ppocr_mobile_v2.0_cls_infer";
 config.rec_infer = modelPathroot + @"\ch_ppocr_server_v2.0_rec_infer";
 config.keys = modelPathroot + @"\ppocr_keys.txt";

 //英文和数字模型v3
 OCRModelConfig config = new OCRModelConfig();
 string root = PaddleOCRSharp.EngineBase.GetRootDirectory();
 string modelPathroot = root + @"\en";
 config.det_infer = modelPathroot + @"\ch_PP-OCRv2_det_infer";
 config.cls_infer = modelPathroot + @"\ch_ppocr_mobile_v2.0_cls_infer";
 config.rec_infer = modelPathroot + @"\en_number_mobile_v2.0_rec_infer";
 config.keys = modelPathroot + @"\en_dict.txt";

  //中英文模型V4
  config = new OCRModelConfig();
 string root = PaddleOCRSharp.EngineBase.GetRootDirectory();
  modelPathroot = root + @"\inference";
  config.det_infer = modelPathroot + @"\ch_PP-OCRv4_det_infer";
  config.cls_infer = modelPathroot + @"\ch_ppocr_mobile_v2.0_cls_infer";
  config.rec_infer = modelPathroot + @"\ch_PP-OCRv4_rec_infer";
  config.keys = modelPathroot + @"\ppocr_keys.txt";

  //服务器中英文模型V4
   config = new OCRModelConfig();
   string root = PaddleOCRSharp.EngineBase.GetRootDirectory();
   modelPathroot = root + @"\inference";
   config.det_infer = modelPathroot + @"\ch_PP-OCRv4_det_server_infer";
   config.cls_infer = modelPathroot + @"\ch_ppocr_mobile_v2.0_cls_infer";
   config.rec_infer = modelPathroot + @"\ch_PP-OCRv4_rec_server_infer";
   config.keys = modelPathroot + @"\ppocr_keys.txt";

常见问题与解决方案

常见问题与解决方案

技术交流方式


QQ技术交流群:318860399。

微信公众号:明月心技术学堂。

输入图片说明 输入图片说明

致谢

  • 感谢ZHao提供Rust版本。

paddleocrsharp's People

Contributors

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paddleocrsharp's Issues

External component has thrown an exception.

堆栈信息:
在 PaddleOCRSharp.PaddleOCREngine.DetectByte(IntPtr engine, Byte[] imagebytedata, Int64 size, IntPtr& result)
在 PaddleOCRSharp.PaddleOCREngine.DetectText(Byte[] imagebyte)
在 PaddleOCRSharp.PaddleOCREngine.DetectText(Image image)
在 HuoHuan.Utils.PaddleUtil.GetImageText(Bitmap bitmap) 在 D:\Work\Code\HuoHuan\src\HuoHuan\Utils\PaddleUtil.cs 中: 第 20 行

报错代码:

    internal static class PaddleUtil
    {
        private static readonly PaddleOCREngine _engine = new(null, new OCRParameter());

        /// <summary>
        /// 识别获取Bitmap文字内容
        /// </summary>
        /// <param name="bitmap"></param>
        /// <returns></returns>
        public static string GetImageText(Bitmap bitmap)
        {
            try
            {
                var ocrResult = _engine.DetectText(bitmap);

                return ocrResult.Text;
            }
            catch (Exception ex)
            {
                return "";
            }
        }
    }

偶现问题,且出现失败后,继续调用会正常。

Could not load file or assembly 'MFCMIFC80, Version=1.0.0.0

image
我使用了Prism框架的插件模块,将OCR模块引入到我的插件项目(x64位编译)中,但是在APp启动加载插件时始终报这个错误,无法启动, 但是我单独搞一个Demo直接测试识别又是可以正常运行的

运行 PaddleOCRSharpDemo出错

提示找不到

*\PaddleOCRSharp\PaddleOCRDemo\PaddleOCRSharpDemo\bin\Debug\inferenceserver\ch_ppocr_server_v2.0_det_infer
*\PaddleOCRSharp\PaddleOCRDemo\PaddleOCRSharpDemo\bin\Debug\inferenceserver\ch_ppocr_mobile_v2.0_cls_infer
*\PaddleOCRSharp\PaddleOCRDemo\PaddleOCRSharpDemo\bin\Debug\inferenceserver\ch_ppocr_server_v2.0_rec_infer
*\PaddleOCRSharp\PaddleOCRDemo\PaddleOCRSharpDemo\bin\Debug\inferenceserver\ppocr_keys.txt

这些东西项目里面都没有,项目不能运行,你的说明文档里面也没有这部分内容。麻烦更新一下文档

内存占用问题

在使用的时候我发现识别一张图的时候
其内存会暴涨到600多兆
而且后面也无法释放
不知道是否属于正常情况

Is GPU Mode possible?

Hello!
I am wondering about using GPU resource, NVIDIA GPU card, for process acceleration. There are GPU related settings in the OCR Parameters of the Paddle OCR Sharp library but it does not work. If it can be worked done, please let me know how to install and activate GPU resources.

regards,

Thanks in advance.

System.AccessViolationException:“尝试读取或写入受保护的内存。这通常指示其他内存已损坏

在多次调用后出现如标题所示异常提示,调试追踪到namespace PaddleOCRSharp中PaddleOCREngine类出错,出错行: int textCount = Detect(Engine, imagefile, out ptrResult);,其中监控方法变量值
Engine:0x0000023efee5e780
imagefile:"C:\Users\aaa\AppData\Local\Temp\26dc935f-5eac-4e80-aa49-e58936246a26.bmp"
ptrResult:0x0000000000000000

怀疑是指针出问题,但能力有限,未能继续分析下去.......

以下是库中的部分代码
[DllImport("PaddleOCR.dll", CallingConvention = CallingConvention.Cdecl, SetLastError = true)]
internal static extern int Detect(IntPtr engine, string imagefile, out IntPtr result);

    /// <summary>
    /// 对图像文件进行文本识别
    /// </summary>
    /// <param name="imagefile">图像文件</param>
    /// <returns></returns>
    public OCRResult DetectText(string imagefile)
    {
        if (!System.IO.File.Exists(imagefile)) throw new Exception($"文件{imagefile}不存在");
        IntPtr ptrResult;
        int textCount = Detect(Engine, imagefile, out ptrResult);

多线程

image

同志,目前是不是已经支持多线程了

循环调用DetectText报错

1、包版本

<PackageReference Include="PaddleOCRSharp" Version="4.2.0" />

2、PaddleOCREngine全局初始化
3、调用代码

 foreach (var file in Request.Form.Files)
 {
     var bytes = new byte[file.Length];
     using (var fileStream = file.OpenReadStream())
     {
         fileStream.Read(bytes, 0, (int)file.Length);
     }
     var text = ocr.DetectText(bytes);
     result.Add(new { key = file.FileName, value = text });
 }
错误:
1、JsonSerializationException: Error converting value {null} to type 'System.Single'. Path '[0].cls_score', line 1, position 131.
2、InvalidCastException: Null object cannot be converted to a value type.

At the same time, PaddleOCRSharp and PaddleSegSharp packaging conflicts are introduced

一个项目同时引入 PaddleOCRSharp 和 PaddleSegSharp 打包冲突

2>找到了多个具有相同相对路径的发布输出文件: E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\concrt140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\concrt140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\libiomp5md.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\libiomp5md.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\mfc140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\mfc140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\mfcm140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\mfcm140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\mklml.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\mklml.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\msvcp140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\msvcp140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\msvcp140_1.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\msvcp140_1.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\msvcp140_2.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\msvcp140_2.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\msvcp140_atomic_wait.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\msvcp140_atomic_wait.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\msvcp140_codecvt_ids.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\msvcp140_codecvt_ids.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\onnxruntime.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\onnxruntime.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\paddle2onnx.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\paddle2onnx.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\paddle_inference.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\paddle_inference.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\vcamp140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\vcamp140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\vccorlib140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\vccorlib140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\vcomp140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\vcomp140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\vcruntime140.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\vcruntime140.dll, E:\package\nuget\globalPackagesFolder\paddlesegsharp\1.1.0\build\PaddleSegLib\vcruntime140_1.dll, E:\package\nuget\globalPackagesFolder\paddleocrsharp\4.0.2\build\PaddleOCRLib\vcruntime140_1.dll。

python 始终找不到.\PaddleOCR.dll

通过打印路径

dll_path = ".\PaddleOCR.dll"
print("路径:", os.path.abspath(dll_path))

输出:路径: C:\Users\Administrator\PaddleOCR.dll
将PaddleOCR.dll复制进C:\Users\Administrator路径下,但是

paddleOCR=cdll.LoadLibrary(".\PaddleOCR.dll")

始终报错找不到

错误信息:
PS C:\Users\Administrator> & E:/python/python.exe e:/工作软件/项目/python/python/PaddleOCRCppPython.py
Traceback (most recent call last):
File "e:/工作软件/项目/python/python/PaddleOCRCppPython.py", line 178, in
paddleOCR=cdll.LoadLibrary(".\PaddleOCR.dll")
File "E:\python\lib\ctypes_init_.py", line 434, in LoadLibrary
return self.dlltype(name)
File "E:\python\lib\ctypes_init
.py", line 356, in init
self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] 找不到指定的模块。

是否楞以复制多份使用

我在.net6中使用了该库,但因为不支持多线程,所以会出现资源争用的情况,导致出现各种异常
甩以不得不加锁,并设为了单例
但是这样会带来一个新的问题
我可能同时有十来个线程需要同时进行ocr识别
这如果其中有一些识别比较耗时且它们排在前面,就会导致后面的线程全部在等待中
会造成后面的线程的识别速度被降低

是否可以每一个线程我复制一份新的dll及其附加依赖项到另一个目录中使用呢?
就像我有1至10个线程,我new十个ocr对象且它们指向各自的目录库?

或者也可以多进程使用?

请问如何启用GPU

我希望使用GPU进行预测,
但每次都会遇到Please compile with gpu to EnableGpu()这个问题
请问如何操作,

Training Set For This Model

Hello,

I am very interesting about the project. In comparsion with the orignal PaddleOCR, I've seen that the performance of your model is so good when detecting the small obejcts.

Could you please share with me what you've changed in the model architecture and the training dataset you've used to train the model?

I am juts curious aabout the techniques. Thank you in advance.

无法加载 DLL“PaddleOCR.dll”: 找不到指定的模块

Hi Raoyutian
下面是我调用paddlepcr遇到的问题,请帮忙看看。。谢谢

System.DllNotFoundException
HResult=0x80131524
Message=无法加载 DLL“PaddleOCR.dll”: 找不到指定的模块。 (异常来自 HRESULT:0x8007007E)。
Source=PaddleOCRSharp
StackTrace:
在 PaddleOCRSharp.PaddleOCREngine.Initialize(String det_infer, String cls_infer, String rec_infer, String keys, OCRParameter parameter)
在 PaddleOCRSharp.PaddleOCREngine..ctor(OCRModelConfig config, OCRParameter parameter) 在 D:\Worke\builds\Paddle\PaddleOCRSharp-main\PaddleOCRSharp\PaddleOCREngine.cs 中: 第 55 行
在 RSADemo.RSADetct.RSAOCR(String ImPath, String OutputSaveImPath, String& Result) 在 D:\Worke\builds\Paddle\RSADetctText\RSADetctText\RSADemo\RSADetct.cs 中: 第 37 行
在 RSADemo.Form1.button1_Click(Object sender, EventArgs e) 在 D:\Worke\builds\Paddle\RSADetctText\RSADetctText\RSADemo\Form1.cs 中: 第 27 行
在 System.Windows.Forms.Control.OnClick(EventArgs e)
在 System.Windows.Forms.Button.OnClick(EventArgs e)
在 System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
在 System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
在 System.Windows.Forms.Control.WndProc(Message& m)
在 System.Windows.Forms.ButtonBase.WndProc(Message& m)
在 System.Windows.Forms.Button.WndProc(Message& m)
在 System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
在 System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
在 System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
在 System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
在 System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
在 RSADemo.Program.Main() 在 D:\Worke\builds\Paddle\RSADetctText\RSADetctText\RSADemo\Program.cs 中: 第 19 行

Not Detect the Space

Hi,

I have a image with space in between the character. But it's ignore, kindly help me to fix this issue.

Thank you

有没有办法优化下大小?

你好,我这边只是用了nuget引入相关依赖,生成的release就有300M,有没有什么办法可以优化下大小?

是否可以复制多份使用

我在.net6中使用了该库,但因为不支持多线程,所以会出现资源争用的情况,导致出现各种异常
所以不得不加锁,并设为了单例
但是这样会带来一个新的问题
我可能同时有十来个线程需要同时进行ocr识别
这如果其中有一些识别比较耗时且它们排在前面,就会导致后面的线程全部在等待中
会造成后面的线程的识别速度被降低

是否可以每一个线程我复制一份新的dll及其附加依赖项到另一个目录中使用呢?
就像我有1至10个线程,我new十个ocr对象且它们指向各自的目录库?

或者也可以多进程使用?

或者说我想岔了,我是否可以每个线程new一个ocr实例是否也是可行的呢?

32bit Version

Hi,

thanks for your work. Is it possibile to have 32bit version?
If not how can I build to make it compatible?

Thanks.

.net 6.0 WebApi 中使用 PaddleOCRSharp 在docker中报错的问题

System.DllNotFoundException: Unable to load shared library 'PaddleOCR.dll' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libPaddleOCR.dll: cannot open shared object file: No such file or directory
at PaddleOCRSharp.PaddleOCREngine.Initialize(String det_infer, String cls_infer, String rec_infer, String keys, OCRParameter parameter)
at PaddleOCRSharp.PaddleOCREngine..ctor(OCRModelConfig config, OCRParameter parameter)

这个异常 如何解决。
在Windows 10 本地运行 完全没有问题,部署到Ubuntu 20.04 Docker中 就出现这个异常 ,求解决方案

4.0.1无法识别表格

demo的版本是3.0.1,可以正常识别表格,nuget升级到4.0.1后无法识别。降级回3.0.1后可以正常识别

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