1 Star 0 Fork 377

热爱 / PaddleOCRSharp

forked from 明月心 / PaddleOCRSharp 
加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
克隆/下载
贡献代码
同步代码
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README
Apache-2.0

简体中文 | English |更新记录

一、介绍

本项目是一个基于百度飞桨PaddleOCR的C++代码修改并封装的.NET的工具类库。包含文本识别、文本检测、基于文本检测结果的统计分析的表格识别功能,同时针对小图识别不准的情况下,做了优化,提高识别准确率。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。 项目封装极其简化,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。

本项目中PaddleOCR.dll文件是基于开源项目PaddleOCR的C++代码修改而成的C++动态库,基于opencv的x64编译而成的。

本项目已经适配PaddleOCR最新版release2.5,并支持PP-OCRv3模型。

超轻量OCR系统PP-OCRv3:中英文、纯英文以及多语言场景精度再提升5% - 11%!

本项目只能在X64的CPU上编译和使用,因此不支持32位。

暂不支持Linux平台,如果有跨平台需求,请把本项目有关Systen.Drawing.dll、Systen.Drawing.Common.dll的引用删除,重新编译。

本项目目前支持以下NET框架:

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

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。

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)

OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
if (ofd.ShowDialog() != DialogResult.OK) return;
var imagebyte = File.ReadAllBytes(ofd.FileName);
 Bitmap bitmap = new Bitmap(new MemoryStream(imagebyte));

 //自带轻量版中英文模型PP-OCRv3
 // OCRModelConfig config = null;

 //服务器中英文模型
 //OCRModelConfig config = new OCRModelConfig();
 //string root = Environment.CurrentDirectory;
 //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
 OCRModelConfig config = new OCRModelConfig();
 string root = Environment.CurrentDirectory;
 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";


 OCRParameter oCRParameter = new  OCRParameter ();
 OCRResult ocrResult = new OCRResult();

//建议程序全局初始化一次即可,不必每次识别都初始化,容易报错。  
 PaddleOCREngine engine = new PaddleOCREngine(config, oCRParameter);
  {
    ocrResult = engine.DetectText(bitmap );
  }
 if (ocrResult != null)
 {
    MessageBox.Show(ocrResult.Text,"识别结果");
 }

//不再用OCR时,请把PaddleOCREngine释放

windows下C++预测库下载地址

调用参数说明

PaddleOCR官方参数

二、文件夹结构

PaddleOCR                    //PaddleOCR.dll文件的源代码文件夹
|--cpp                       //PaddleOCR.dll的Cpp文件
|--include                   //PaddleOCR.dll的.h文件

PaddleOCRLib                 //OCR运行需要的文件
|--inference                 //OCR的轻量中文简体模型库
|--libiomp5md.dll            //第三方引用库
|--mkldnn.dll                //第三方引用库
|--mklml.dll                 //第三方引用库
|--opencv_world411.dll       //第三方引用库
|--paddle_inference.dll      //飞桨库
|--PaddleOCR.dll             //基于开源项目PaddleOCR修改的C++动态库,源码见根目录下的PaddleOCR文件夹 
PaddleOCRSharp               //.NET封装库项目
PaddleOCRDemo                //Demo文件夹
|--Cpp                       //C++项目需要引用的PaddleOCR.dll的头文件和库文件
|--PaddleOCRCppDemo          //C++调用示例项目
|--PaddleOCRSharpDemo        //.NET调用示例项目
|--WebAPIDemo                //.NET的WebAPI示例项目

三、源码编译

关于源码编译,PaddleOCRSharp项目包含众多.Net框架,因此建议采用vs2022版本编译,如果遇到无法编译,请切换成release后再切换回debug即可。 如果因框架编译问题无法编译,请修改PaddleOCRSharp\PaddleOCRSharp.csproj文件,删除当前电脑没有的框架,或者只保留你想要的.Net框架。 具体框架说明见微软文档SDK 样式项目中的目标框架

 <TargetFrameworks>
net35;net40;net45;net451;net452;net46;net461;net462;net47;net471;net472;net48;
netstandard2.0;netcoreapp3.1;
net5.0;net6.0;
</TargetFrameworks>

四、.NET使用示例

  OpenFileDialog ofd = new OpenFileDialog();
  ofd.Filter = "*.*|*.bmp;*.jpg;*.jpeg;*.tiff;*.tiff;*.png";
  if (ofd.ShowDialog() != DialogResult.OK) return;
  var imagebyte = File.ReadAllBytes(ofd.FileName);
  Bitmap bitmap = new Bitmap(new MemoryStream(imagebyte));
  OCRModelConfig config = null;
  OCRParameter oCRParameter = new  OCRParameter ();

  OCRResult ocrResult = new OCRResult();

  //建议程序全局初始化一次即可,不必每次识别都初始化,容易报错。     
  PaddleOCREngine engine = new PaddleOCREngine(config, oCRParameter);
   {
    ocrResult = engine.DetectText(bitmap );
   }
 if (ocrResult != null)
 {
    MessageBox.Show(ocrResult.Text,"识别结果");
 }

C++示例代码

五、实时预览

在PaddleOCRDemo\PaddleOCRSharpDemo项目中,有一个实时预览参数窗口,在界面上调整不同的识别参数,可以直观的看到预测的结果。 编译并运行PaddleOCRSharpDemo项目,如图: 输入图片说明 然后点击【参数调整】菜单按钮,弹出一个实时调整参数预览界面,点击【打开文件】选择一个本地图片,然后调整参数,可以预览实时参数的预测结果。 输入图片说明

六、常见问题与解决方案

常见问题与解决方案


喜欢的话就给个星,如果对你有用,就点个赞。开源不容易,为了造福大众。谢谢!


QQ技术交流群:318860399。

微信公众号:明月心技术学堂。

个人博客地址: https://www.cnblogs.com/raoyutian/

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types. "Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below). "Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof. "Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution." "Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work. 2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form. 3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed. 4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions: (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and (b) You must cause any modified files to carry prominent notices stating that You changed the files; and (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License. You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License. 5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions. 6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file. 7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License. 8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages. 9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright [yyyy] [name of copyright owner] Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

简介

本项目是基于开源项目PaddleOCR的的.NET封装库,包含文本OCR功能。 展开 收起
C#
Apache-2.0
取消

发行版

暂无发行版

贡献者

全部

近期动态

加载更多
不能加载更多了
C#
1
https://gitee.com/ZhongLao/paddle-ocrsharp.git
git@gitee.com:ZhongLao/paddle-ocrsharp.git
ZhongLao
paddle-ocrsharp
PaddleOCRSharp
master

搜索帮助

14c37bed 8189591 565d56ea 8189591