Tesseract + opencv 3.0 + Windows，文本模块尺寸小，链接错误 [英] Tesseract + opencv 3.0 + windows, text module small size, linking errors
问题描述
两天前，我在answer.opencv.org中发布了此文本，现在我也将其发布在这里. http://answers.opencv.org/question/68634/text-contrib-module-and-tesseract/
I posted this text two days ago in answers.opencv.org, now I'm posting it here as well. http://answers.opencv.org/question/68634/text-contrib-module-and-tesseract/
大家下午好.首先，对不起我的英语呵呵. 我一直在尝试构建opencv contrib模块'text'，但是我 没有成功.注意:诸如xfeatures2d之类的其他模块从来没有 给我一个问题.
Good afternoon to everyone. First of all, sorry for my english hehe. I've been trying to build the opencv contrib module 'text', however I haven't got sucess. Note: Other modules like xfeatures2d have never given me a problem.
我的平台是Windows 7 x64，我使用VS2013作为编译器， 跟着这个 教程( http://vorba.ch/2014/tesseract-3.03-vs2013.html)为了 将Tesseract 3.04构建为LIB，但是在成功编译之后，我 想用cmake生成vproj，问题是 以下:
My platform is windows 7 x64 and I use VS2013 as compiler, I've followed this tutorial(http://vorba.ch/2014/tesseract-3.03-vs2013.html) in order to build Tesseract 3.04 as LIB, but after compiling it succesfully, I want to generate the vproj with cmake and the problem is the following:
在CMake GUI中，以前选择过opencv源EXTRAS 目录等，我没有在"Tesseract"组下找到vars 正确地(包括并轻弹).我知道是因为当我点击 配置，日志显示"Tesseract:否".
In CMake GUI, having previously selected opencv source, EXTRAS directory, etc etc, I don't get the vars under 'Tesseract' group set correcly (INCLUDE AND LIBS). I know it because when I click on configure, The log says "Tesseract: NO".
我检查了FindTesseract cmake脚本，我认为它 不起作用......
I've inspected the FindTesseract cmake script and I think that it doesn't work....
请，任何人都可以给我一些有关发生情况的线索?如何 可以构建opencv文本模块以使用Tesseract函数吗?
Please, anyone could give me a little clue about what's happening? How can I build the opencv text module to use Tesseract functions?
我也尝试编译文本模块，将链接路径添加到Tesseract 但是当我想在程序中使用时，出现关于未定义的链接错误 符号...
Also I've tried to compile text module adding link paths to Tesseract but when I want to use in my program I get link errors about undefined symbols...
这种情况使我花了很多时间来困扰我.在那里 有人在Windows下使用文本模块?
This situation is taking me serveral days bothering me. Are there someone who is using text module under windows?
没有人可以帮助我吗?我已经取得了一些进展，现在是cmake GUI，我说:Tesseract:是的.问题是我没有找到用于链接leptonica lib的条目，该条目不在同一Tesseract组中，而在未分组的条目"中.
Nobody can help me? I've made some progress, now cmake GUI, says me Tesseract:Yes. The problem was that I hadn't found the entry for linking the leptonica lib, which's not in the same Tesseract group but in 'Ungrouped Entries'.
好吧，现在问题仍然存在，由cmake创建的VS解决方案无法正确构建文本模块，因为我可以看到Lept lib约为9Mb，TesseractLib为128Mb(在/MT和debug中)，但是opencv_text300d.lib只有12Mb.出了点问题....
Ok, now the problem remains same, the VS solution created by cmake is not building the text module correctly as I can see Lept lib is about 9Mb and TesseractLib is 128Mb (in /MT and debug), however the opencv_text300d.lib is only 12Mb. Something is wrong....
我不确定我必须使用哪个tesseract版本.我有两种组合: liblept168-static-mtdll-debug.lib + libtesseract302-static-debug.lib 和 liblept171-static-mtdll-debug.lib + libtesseract304-static-debug.lib
I'm not sure about what tesseract version I must use. I've traid with two combinations: liblept168-static-mtdll-debug.lib + libtesseract302-static-debug.lib and liblept171-static-mtdll-debug.lib + libtesseract304-static-debug.lib
当然，当我将文本模块链接到程序时，它会给我链接错误.
Of course when I link text module to my program it gives me link errors.
链接错误看起来像:opencv_text300d.lib(ocr_tesseract.obj):错误LNK2019: unresolved external symbol "public: bool __cdecl tesseract::PageIterator::BoundingBox(enum tesseract::PageIteratorLevel,int *,int *,int *,int *)const " (?........................
The linking errors look like: opencv_text300d.lib(ocr_tesseract.obj) : error LNK2019: unresolved external symbol "public: bool __cdecl tesseract::PageIterator::BoundingBox(enum tesseract::PageIteratorLevel,int *,int *,int *,int *)const " (?........................
...
#include "opencv2/text.hpp"
...
string output;
cv::Mat aux;
Ptr<OCRTesseract> ocr = OCRTesseract::create();
ocr->run(aux, output);
...
很明显，我为项目设置了其他包含目录，链接器其他库目录，并向文本模块输入了其他依赖项.
Obviously I've set up my project with additional include directories, linker additional library directory and input additional dependecies to the text module.
真的，非常感谢您.
推荐答案
我遇到了同样的问题.我想出的解决方案是在文本模块中编辑CMakeLists.txt文件.
I was facing the same problem. The solution I came up with was to edit the CMakeLists.txt file in text module.
替换
if(${Tesseract_FOUND})
include_directories(${Tesseract_INCLUDE_DIR})
endif()
使用
add_definitions( -DWINDOWS)
add_definitions( -DNOMINMAX)
SET(Tesseract_DIR "C:\\tesseract-build\\tesseract-ocr")
SET(Lept_DIR "C:\\tesseract-build\\lib")
include_directories(
${Tesseract_DIR}/api
${Tesseract_DIR}/ccutil/
${Tesseract_DIR}/ccstruct/
${Tesseract_DIR}/ccmain/
)
link_directories( ${Tesseract_DIR}/vs2013/bin/Win32/DLL_Release/
${Lept_DIR}/
${Lept_DIR}/Win32/
)
运行Cmake时，Tesseract仍为否，并且Tessaract/Lept库应该为空.
When you run Cmake, Tesseract will still be no and the Tessaract/Lept libraries should be empty.
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