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tesseract

tesseract-ocrApache-2.0活跃维护

老牌开源 OCR 引擎，用 LSTM 识别图片中的文字，支持上百种语言，适合做文档扫描和文本提取。

Tesseract Open Source OCR Engine (main repository)

5.5.4发布于 2026-10-28 11:19 UTC77,445star +46 / 7 天10,908fork同步于 2026-11-10 17:18 UTC
OCR引擎文字识别LSTM文档解析多语言识别
对比 GitHub 官网hacktoberfestlstmmachine-learningocrocr-engine

怎么上手

由 README 提炼，执行前请确认
原文 
tesseract imagename outputbase [-l lang] [--oem ocrenginemode] [--psm pagesegmode] [configfiles...]
硬件要求按 README 说明

README 未说明硬件要求，未提及 GPU 或显存；依赖 Leptonica 库读取输入图片。

下载：源码 zip·GitHub Releases（安装包）本站不镜像安装包

项目说明

由 README 自动翻译提炼
没人工点评？写下你的经验

开源 OCR 引擎，提供 libtesseract 库和 tesseract 命令行，把图片文字转成文本

老牌开源 OCR 引擎，用 LSTM 识别图片中的文字，支持上百种语言，适合做文档扫描和文本提取。

核心能力

  • 基于 LSTM 神经网络做行识别，保留 Tesseract 3 传统引擎模式
  • 开箱支持 UTF-8 与 100 多种语言的识别
  • 支持 PNG、JPEG、TIFF 等多种输入图片格式
  • 输出纯文本、hOCR、PDF、TSV、ALTO、PAGE 等格式
  • 提供 C 与 C++ API，可自行训练识别其他语言

容易踩的坑

需额外下载 traineddata 语言数据文件，否则无法识别对应语言；本项目不含 GUI，需要界面得另找第三方项目；从源码编译前需确认系统编译器在支持列表内。

内容由模型根据 README 生成，可能不完整或不准确，以官方文档为准。看原文 README

最近发版

5 个版本5.5.4
全部 release
  1. 5.5.4最新正式版2026-10-28 · 2026-10-28 11:19 UTC

    What's Changed

    This release fixes 17 security advisories and several smaller issues. In addition, it provides some smaller updates and improvements:

  2. 5.5.32026-07-24 · 2026-07-24 18:33 UTC
    查看更新说明

    What's Changed

    This release fixes two security advisories and several smaller issues. In addition, it provides some smaller updates and improvements:

  3. 5.5.22025-12-26 · 2025-12-26 17:32 UTC
    查看更新说明

    What's Changed

    New Contributors

    Full Changelog: https://github.com/tesseract-ocr/tesseract/compare/5.5.1...5.5.2

  4. 5.5.12025-05-25 · 2025-05-25 09:53 UTC
    查看更新说明

    What's Changed

    New Contributors

    Full Changelog: https://github.com/tesseract-ocr/tesseract/compare/5.5.0...5.5.1

  5. 5.5.02024-11-10 · 2024-11-10 19:29 UTC
    查看更新说明

    What's Changed

    New Contributors

    Full Changelog: https://github.com/tesseract-ocr/tesseract/compare/5.4.1...5.5.0

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    README 原文

    未翻译
    在 GitHub 打开

    Tesseract OCR

    Coverity Scan Build Status CodeQL OSS-Fuzz
    GitHub license Downloads

    Table of Contents

    About

    This package contains an OCR engine - libtesseract and a command line program - tesseract.

    Tesseract 4 adds a new neural net (LSTM) based OCR engine which is focused on line recognition, but also still supports the legacy Tesseract OCR engine of Tesseract 3 which works by recognizing character patterns. Compatibility with Tesseract 3 is enabled by using the Legacy OCR Engine mode (--oem 0). It also needs traineddata files which support the legacy engine, for example those from the tessdata repository.

    Stefan Weil is the current lead developer. Ray Smith was the lead developer until 2017. The maintainer is Zdenko Podobny. For a list of contributors see AUTHORS and GitHub's log of contributors.

    Tesseract has unicode (UTF-8) support, and can recognize more than 100 languages "out of the box".

    Tesseract supports various image formats including PNG, JPEG and TIFF.

    Tesseract supports various output formats: plain text, hOCR (HTML), PDF, invisible-text-only PDF, TSV, ALTO and PAGE.

    You should note that in many cases, in order to get better OCR results, you'll need to improve the quality of the image you are giving Tesseract.

    This project does not include a GUI application. If you need one, please see the 3rdParty documentation.

    Tesseract can be trained to recognize other languages. See Tesseract Training for more information.

    Brief history

    Tesseract was originally developed at Hewlett-Packard Laboratories Bristol UK and at Hewlett-Packard Co, Greeley Colorado USA between 1985 and 1994, with some more changes made in 1996 to port to Windows, and some C++izing in 1998. In 2005 Tesseract was open sourced by HP. From 2006 until August 2017 it was developed by Google.

    Major version 5 is the current stable version and started with release 5.0.0 on November 30, 2021. Newer minor versions and bugfix versions are available from GitHub.

    Latest source code is available from main branch on GitHub. Open issues can be found in issue tracker, and planning documentation.

    See Release Notes and Change Log for more details of the releases.

    Installing Tesseract

    You can either Install Tesseract via pre-built binary package or build it from source.

    Before building Tesseract from source, please check that your system has a compiler which is one of the supported compilers.

    Running Tesseract

    Basic command line usage:

    tesseract imagename outputbase [-l lang] [--oem ocrenginemode] [--psm pagesegmode] [configfiles...]

    For more information about the various command line options use tesseract --help or man tesseract.

    Examples can be found in the documentation.

    For developers

    Developers can use libtesseract C or C++ API to build their own application. If you need bindings to libtesseract for other programming languages, please see the wrapper section in the AddOns documentation.

    Documentation of Tesseract generated from source code by doxygen can be found on tesseract-ocr.github.io.

    Support

    Before you submit an issue, please review the guidelines for this repository.

    For support, first read the documentation, particularly the FAQ to see if your problem is addressed there. If not, search the Tesseract user forum, the Tesseract developer forum and past issues, and if you still can't find what you need, ask for support in the mailing-lists.

    Mailing-lists:

    Please report an issue only for a bug, not for asking questions.

    License

    The code in this repository is 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.

    NOTE: This software depends on other packages that may be licensed under different open source licenses.

    Tesseract uses the Leptonica library which essentially uses a BSD 2-clause license.

    Dependencies

    Tesseract uses Leptonica library for opening input images (e.g. not documents like pdf). It is suggested to use leptonica with built-in support for zlib, png and tiff (for multipage tiff).

    Latest Version of README

    For the latest online version of the README.md see:

    https://github.com/tesseract-ocr/tesseract/blob/main/README.md

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