找不到 "Leptonica" 提供的包配置文件

Question

我正在尝试从 tesseract 4.1.1 源代码生成一个 visual studio 2019 C++ 项目。最后，我想在使用 OCR 结果的自定义解决方案中包含一个 tesseract C++ 项目。

当我执行以下步骤时：

下载并解压 tesseract 代码 https://github.com/tesseract-ocr/tesseract/archive/refs/tags/4.1.1.zip 到“C:\tesseract”目录。
在 VS 2019 的开发人员命令提示符中执行以下命令：

C:\Windows\System32>cd "C:\tesseract"
C:\tesseract>mkdir build
C:\tesseract>cd build
C:\tesseract\build>cmake ..

我收到这个错误：

Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
CMake Error at CMakeLists.txt:224 (find_package):
  Could not find a package configuration file provided by "Leptonica"
  (requested version 1.74) with any of the following names:

  LeptonicaConfig.cmake
  leptonica-config.cmake

  Add the installation prefix of "Leptonica" to CMAKE_PREFIX_PATH or set
  "Leptonica_DIR" to a directory containing one of the above files.  If
  "Leptonica" provides a separate development package or SDK, be sure it has
  been installed.


-- Configuring incomplete, errors occurred!
See also "C:/tesseract/build/CMakeFiles/CMakeOutput.log".

这里是 CMakeLists.txt 文件的相关部分：

CMakeLists.txt screenshot

find_package(PkgConfig)
if(PKG_CONFIG_EXECUTABLE AND NOT Leptonica_DIR)
    pkg_check_modules(Leptonica REQUIRED lept>=${MINIMUM_LEPTONICA_VERSION})
    link_directories(${Leptonica_LIBRARY_DIRS})
else()
    find_package(Leptonica ${MINIMUM_LEPTONICA_VERSION} REQUIRED CONFIG)
endif()
if (NOT Leptonica_FOUND)
    message(FATAL_ERROR "Cannot find required library Leptonica. Quitting!")
endif(NOT Leptonica_FOUND)

find_package(LibArchive)
if(LibArchive_FOUND)
    set(HAVE_LIBARCHIVE ON)
endif()

解决方案：

在学习了user898678提供的教程和实验之后，这就是我所学到的。

教程中列出的命令（以及下面提供的列表中的命令）可以在普通命令提示符下执行。它们不需要在 Visual Studio.

的开发人员命令提示符下执行

教程（通常）使它变得非常混乱，因为它们试图包含所有内容和每个场景的步骤。就我而言，我只是在为 Tesseract 寻找一个有效的 VS 项目。这个由user898678提供的blogpost是最有用的。我提炼出运行所需的命令如下：

set INSTALL_DIR="C:\Temp\Tesseract"
set PATH=%PATH%;%INSTALL_DIR%\bin
call "C:\Program Files (x86)\Microsoft Visual Studio19\Professional\VC\Auxiliary\Build\vcvars64.bat" x64
set INCLUDE=%INCLUDE%;%INSTALL_DIR%\include
set LIBPATH=%LIBPATH%;%INSTALL_DIR%\lib

git clone --depth 1 https://github.com/DanBloomberg/leptonica.git
cd leptonica
cmake -Bbuild -DCMAKE_BUILD_TYPE=Release ^
   -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% -DCMAKE_PREFIX_PATH=%INSTALL_DIR% ^
   -DBUILD_PROG=OFF -DSW_BUILD=OFF -DBUILD_SHARED_LIBS=ON
cmake --build build  --config Release --target install
cd ..

git clone -b 4.1.1 --depth 1 https://github.com/tesseract-ocr/tesseract.git
cd tesseract
cmake -Bbuild -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% ^
    -DCMAKE_PREFIX_PATH=%INSTALL_DIR% ^
    -DLeptonica_DIR=%INSTALL_DIR%\lib\cmake  ^
    -DBUILD_TRAINING_TOOLS=OFF -DSW_BUILD=OFF ^
    -DOPENMP_BUILD=OFF -DBUILD_SHARED_LIBS=ON
cmake --build build --config Release --target install

对我来说，剔除散落在命令语法中的所有讨论和说明后，命令变得更容易理解。

Answer 1

有几个教程如何使用 cmake 和 VS 在 windows 上构建 tesseract，例如https://bucket401.blogspot.com/2021/03/building-tesserocr-on-ms-windows-64bit.html (you can ignore end of tutorial - python module), minimalist tesseract or with clang

找不到 "Leptonica" 提供的包配置文件

Could not find a package configuration file provided by "Leptonica"

c++

tesseract

cmake

visual-studio

leptonica