Binaries to download are available at https://github.com/ollydev/libTesseract/releases
This is a shared library (dll, so, dylib) which exports basic C Tesseract-OCR functions for basic text recognition. Tesseract and it's dependencies have been statically linked so only a single library is required.
Many optional features are not included to make static linking much easier:
'--without-libpng' '--without-zlib' '--without-jpeg' '--without-libtiff' '--without-giflib' '--without-libwebp' '--without-libwebpmux' '--without-libopenjpeg'
'--disable-legacy' '--disable-graphics' '--disable-openmp' '--without-curl' '--without-archive'
Everything here is exported, including whatever dependencies were linked: https://github.com/tesseract-ocr/tesseract/blob/main/include/tesseract/capi.h
In addition the following "simple" methods are exported:
tesseract::TessBaseAPI* Tesseract_Create();
void Tesseract_Delete(tesseract::TessBaseAPI* &tesseract_ptr);
int Tesseract_Init(tesseract::TessBaseAPI* tesseract_ptr, const char* datapath, const char* language);
void Tesseract_End(tesseract::TessBaseAPI* &tesseract_ptr);
void Tesseract_SetPageSegMode(tesseract::TessBaseAPI* tesseract_ptr, int mode);
int Tesseract_GetPageSegMode(tesseract::TessBaseAPI* tesseract_ptr);
float Tesseract_MeanTextConf(tesseract::TessBaseAPI* tesseract_ptr);
void Tesseract_SetImage(tesseract::TessBaseAPI* tesseract_ptr, const unsigned char* imagedata, int width, int height, int bytes_per_pixel, int bytes_per_line);
const char* Tesseract_GetUTF8Text(tesseract::TessBaseAPI* tesseract_ptr, uint32_t* len);
void Tesseract_FreeUTF8Text(char* &utf8_text_ptr);
bool Tesseract_SetVariable(tesseract::TessBaseAPI* tesseract_ptr, const char* name, const char* value);
void Tesseract_Clear(tesseract::TessBaseAPI* tesseract_ptr);
int Tesseract_GetBlockCount(tesseract::TessBaseAPI* tesseract_ptr);
int Tesseract_GetLineCount(tesseract::TessBaseAPI* tesseract_ptr);
int Tesseract_GetWordCount(tesseract::TessBaseAPI* tesseract_ptr);
int Tesseract_GetCharacterCount(tesseract::TessBaseAPI* tesseract_ptr);
void Tesseract_GetBlockMatch(tesseract::TessBaseAPI* tesseract_ptr, int index, char* &text, int* len, float* confidence, int* x1, int* y1, int* x2, int* y2);
void Tesseract_GetLineMatch(tesseract::TessBaseAPI* tesseract_ptr, int index, char* &text, int* len, float* confidence, int* x1, int* y1, int* x2, int* y2);
void Tesseract_GetWordMatch(tesseract::TessBaseAPI* tesseract_ptr, int index, char* &text, int* len, float* confidence, int* x1, int* y1, int* x2, int* y2);
void Tesseract_GetCharacterMatch(tesseract::TessBaseAPI* tesseract_ptr, int index, char* &text, int* len, float* confidence, int* x1, int* y1, int* x2, int* y2);Example Pascal header:
function Tesseract_Init(Tess: Pointer; DataPath, Language: PChar): Int32; external 'libtesseract32.dll'See the workflows to see how this is built.