使用 Tesseract OCR 的 C API 构建错误

Question

使用using the API 和另一个how to get the image data into a format recognizable by Tesseract 上的链接，我编写了以下代码，并将...tesseract/ccmain/ 目录添加到我的Visual C++ 项目（已用于OpenCV）的Include Directories 中。

#include "baseapi.h"

..... [OpenCV 代码等]....

//********************* Tesseract OCR function calls *********************************************

 // create a temp buffer 
    unsigned char *buffer,*temp2; 
    buffer = new unsigned char[plate->width*plate->height*plate->nChannels]; 
    //'plate' is an IplImage*
    temp2 = buffer; 
    // pointer to imageData 
    unsigned char *temp1 = (unsigned char*) plate->imageData; 
    // copy imagedata to buffer row by row 
    for(i=0;i<plate->height;i++) 
    { 
            memcpy(temp2, temp1, plate->width*plate->nChannels); 
            // imageData jump to next line 
            temp1 = temp1 + plate->widthStep; 
            // buffer jump to next line 
            temp2 = temp2+ plate->width*plate->nChannels; 
    } 

     TessBaseAPI::InitWithLanguage(NULL, NULL, "eng", NULL, false, 0, NULL);
  char* Text = TessBaseAPI::TesseractRect( buffer, 8, 8,
                               0, 0, plate->width,plate->height);
  TessBaseAPI::End();

  printf("\n%s", Text );

它编译时没有任何错误，但是当我尝试构建它时，每个与 Tesseract 相关的函数调用都会出现此错误：“未解析的外部符号 XXXXX。” 我在链接和包含 Tesseract 时是否犯了任何错误，它没有出现在编译时，而只出现在构建时？

任何帮助都会很棒。

编辑：这些是错误消息：

Linking...
image.obj : error LNK2001: unresolved external symbol "public: static void __cdecl TessBaseAPI::End(void)" (?End@TessBaseAPI@@SAXXZ)
image.obj : error LNK2001: unresolved external symbol "public: static char * __cdecl TessBaseAPI::TesseractRect(unsigned char const *,int,int,int,int,int,int)" (?TesseractRect@TessBaseAPI@@SAPADPBEHHHHHH@Z)
image.obj : error LNK2001: unresolved external symbol "public: static int __cdecl TessBaseAPI::InitWithLanguage(char const *,char const *,char const *,char const *,bool,int,char * * const)" (?InitWithLanguage@TessBaseAPI@@SAHPBD000_NHQAPAD@Z)
Debug/proj.exe : fatal error LNK1120: 3 unresolved externals
Error executing link.exe.
Creating browse info file...

proj.exe - 4 error(s), 0 warning(s)

Answer 1

您需要找到相关的 .LIB 文件并将它们链接到您的项目。

Answer 2

您好，请您尝试以下代码...

#define TESSDLL_IMPORTS
#include "stdafx.h"
#include "baseapi.h"
#include <string>

using namespace std;

int main(int argc, char **argv)
{
    string outfile;
    tesseract::TessBaseAPI api;

    return 0;
}