apiexample_test.cc File Reference

#include "gtest/gtest.h"
#include "baseapi.h"
#include "leptonica/allheaders.h"
#include <iostream>
#include <string>
#include <fstream>
#include <locale>

Go to the source code of this file.

Functions
	TEST (TesseractTest, ApiExample)
int	main (int argc, char **argv)

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

This program reads in a text file consisting of feature samples from a training page in the following format:

   FontName UTF8-char-str xmin ymin xmax ymax page-number
    NumberOfFeatureTypes(N)
      FeatureTypeName1 NumberOfFeatures(M)
         Feature1
         ...
         FeatureM
      FeatureTypeName2 NumberOfFeatures(M)
         Feature1
         ...
         FeatureM
      ...
      FeatureTypeNameN NumberOfFeatures(M)
         Feature1
         ...
         FeatureM
   FontName CharName ...

The result of this program is a binary inttemp file used by the OCR engine.

Parameters

argc	number of command line arguments
argv	array of command line arguments

Returns

none

Note

Exceptions: none

History: Fri Aug 18 08:56:17 1989, DSJ, Created.

History: Mon May 18 1998, Christy Russson, Revistion started.

Definition at line 53 of file apiexample_test.cc.

                                {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}

TEST()

TEST	(	TesseractTest	,
		ApiExample
	)

Definition at line 24 of file apiexample_test.cc.

{
    char *outText;
    std::locale loc("C"); // You can also use "" for the default system locale
    std::ifstream file("../testing/phototest.txt");
    file.imbue(loc); // Use it for file input
    std::string gtText((std::istreambuf_iterator<char>(file)),
             std::istreambuf_iterator<char>());
        
    tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
    // Initialize tesseract-ocr with English, without specifying tessdata path
    ASSERT_FALSE(api->Init(nullptr, "eng")) << "Could not initialize tesseract.";

    // Open input image with leptonica library
    Pix *image = pixRead("../testing/phototest.tif");
    ASSERT_TRUE(image != nullptr) << "Failed to read test image.";
    api->SetImage(image);
    // Get OCR result
    outText = api->GetUTF8Text();

    ASSERT_EQ(gtText,outText) << "Phototest.tif with default values OCR does not match ground truth";

    // Destroy used object and release memory
    api->End();
    delete [] outText;
    pixDestroy(&image);

}