Adds OCRTesseract class and sample demo

Author: lluisgomez

modules/text/CMakeLists.txt

@@ -1,2 +1,25 @@
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR})
+
+find_package(Tesseract)
+if(Tesseract_FOUND)
+    message(STATUS "Tesseract:   YES")
+    set(HAVE_TESSERACT 1)
+else()
+    message(STATUS "Tesseract:   NO")
+endif()
+
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/text_config.hpp.in
+               ${CMAKE_BINARY_DIR}/text_config.hpp @ONLY)
+
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+if(${Tesseract_FOUND})
+include_directories(${Tesseract_INCLUDE_DIR})
+endif()
+
 set(the_description "Text Detection and Recognition")
 ocv_define_module(text opencv_ml opencv_highgui opencv_imgproc opencv_core)
+
+if(${Tesseract_FOUND})
+  target_link_libraries(opencv_text ${Tesseract_LIBS})
+endif()

modules/text/FindTesseract.cmake

@@ -0,0 +1,24 @@
+# Tesseract OCR
+unset(Tesseract_FOUND)
+
+find_path(Tesseract_INCLUDE_DIR tesseract/baseapi.h
+  HINTS
+  /usr/include
+  /usr/local/include)
+
+find_library(Tesseract_LIBRARY NAMES tesseract
+  HINTS
+  /usr/lib
+  /usr/local/lib)
+
+find_library(Lept_LIBRARY NAMES lept
+  HINTS
+  /usr/lib
+  /usr/local/lib)
+
+set(Tesseract_LIBS ${Tesseract_LIBRARY} ${Lept_LIBRARY})
+if(Tesseract_LIBS AND Tesseract_INCLUDE_DIR)
+    set(Tesseract_FOUND 1)
+endif()
+
+        

modules/text/include/opencv2/text.hpp

@@ -40,5 +40,6 @@ the use of this software, even if advised of the possibility of such damage.
 #define __OPENCV_TEXT_HPP__
 
 #include "opencv2/text/erfilter.hpp"
+#include "opencv2/text/ocr.hpp"
 
 #endif

modules/text/include/opencv2/text/ocr.hpp

@@ -0,0 +1,110 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                          License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#ifndef __OPENCV_TEXT_OCR_HPP__
+#define __OPENCV_TEXT_OCR_HPP__
+
+#include "text_config.hpp"
+
+#ifdef HAVE_TESSERACT
+#include <tesseract/baseapi.h>
+#include <tesseract/resultiterator.h>
+#endif
+
+#include "opencv2/core.hpp"
+#include <vector>
+#include <string>
+
+
+namespace cv
+{
+namespace text
+{
+
+using namespace std;
+
+enum
+{
+    OCR_LEVEL_WORD,
+    OCR_LEVEL_TEXTLINE
+};
+
+#ifdef HAVE_TESSERACT
+class CV_EXPORTS OCRTesseract
+{
+private:
+    tesseract::TessBaseAPI tess;
+
+public:
+    //Default constructor
+    OCRTesseract(const char* datapath=NULL, const char* language=NULL, const char* char_whitelist=NULL,
+                 tesseract::OcrEngineMode oem=tesseract::OEM_DEFAULT, tesseract::PageSegMode psmode=tesseract::PSM_AUTO);
+
+    ~OCRTesseract();
+
+    void run(Mat& image, string& output_text, vector<Rect>* component_rects=NULL,
+             vector<string>* component_texts=NULL, vector<float>* component_confidences=NULL,
+             int component_level=0);
+};
+#else
+//stub
+class CV_EXPORTS OCRTesseract
+{
+public:
+    //Default constructor
+    OCRTesseract(const char* datapath=NULL, const char* language=NULL, const char* char_whitelist=NULL,
+                 int oem=0, int psmode=0);
+
+    ~OCRTesseract();
+
+    void run(Mat& image, string& output_text, vector<Rect>* component_rects=NULL,
+             vector<string>* component_texts=NULL, vector<float>* component_confidences=NULL,
+             int component_level=0);
+};
+#endif
+
+
+
+}
+}
+#endif // _OPENCV_TEXT_OCR_HPP_