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apiexample_test.cc
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apiexample_test.cc
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///////////////////////////////////////////////////////////////////////
// File: apiexample_test.cc
// Description: Api Example for Tesseract.
// Author: ShreeDevi Kumar
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
///////////////////////////////////////////////////////////////////////
#include "gtest/gtest.h"
#include "baseapi.h"
#include "leptonica/allheaders.h"
#include <iostream>
#include <string>
#include <fstream>
#include <locale>
TEST(TesseractTest, ApiExample)
{
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
if (api->Init(NULL, "eng")) {
fprintf(stderr, "Could not initialize tesseract.\n");
exit(1);
}
// 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);
}
int main(int argc, char **argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}