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///////////////////////////////////////////////////////////////////////
// File: apiexample_test.cc
// Description: Api Test for Tesseract using text fixtures and parameters.
// Tests for Devanagari, Latin and Arabic scripts are disabled by default.
// Disabled tests can be run when required by using the
// --gtest_also_run_disabled_tests argument.
// ./unittest/apiexample_test --gtest_also_run_disabled_tests
//
// 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.
///////////////////////////////////////////////////////////////////////
// expects clone of tessdata_fast repo in ../../tessdata_fast
//#include "log.h"
#include <allheaders.h>
#include <tesseract/baseapi.h>
#include <time.h>
#include <fstream>
#include <iostream>
#include <locale>
#include <memory> // std::unique_ptr
#include <string>
#include "include_gunit.h"
#include "image.h"
namespace tesseract {
class QuickTest : public testing::Test {
protected:
void SetUp() override {
start_time_ = time(nullptr);
}
void TearDown() override {
#ifndef NDEBUG
// Debug builds can be very slow, so allow 4 min for OCR of a test image.
// apitest_example including disabled tests takes about 18 min on ARMv7.
const time_t MAX_SECONDS_FOR_TEST = 240;
#else
// Release builds typically need less than 10 s for OCR of a test image,
// apitest_example including disabled tests takes about 90 s on ARMv7.
const time_t MAX_SECONDS_FOR_TEST = 55;
#endif
const time_t end_time = time(nullptr);
EXPECT_TRUE(end_time - start_time_ <= MAX_SECONDS_FOR_TEST)
<< "The test took too long - " << ::testing::PrintToString(end_time - start_time_);
}
time_t start_time_;
};
void OCRTester(const char *imgname, const char *groundtruth, const char *tessdatadir,
const char *lang) {
// log.info() << tessdatadir << " for language: " << lang << std::endl;
char *outText;
std::locale loc("C"); // You can also use "" for the default system locale
std::ifstream file(groundtruth);
file.imbue(loc); // Use it for file input
std::string gtText((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
auto api = std::make_unique<tesseract::TessBaseAPI>();
ASSERT_FALSE(api->Init(tessdatadir, lang)) << "Could not initialize tesseract.";
Image image = pixRead(imgname);
ASSERT_TRUE(image != nullptr) << "Failed to read test image.";
api->SetImage(image);
outText = api->GetUTF8Text();
EXPECT_EQ(gtText, outText) << "Phototest.tif OCR does not match ground truth for "
<< ::testing::PrintToString(lang);
api->End();
api->ClearPersistentCache();
delete[] outText;
image.destroy();
}
class MatchGroundTruth : public QuickTest, public ::testing::WithParamInterface<const char *> {};
TEST_P(MatchGroundTruth, FastPhototestOCR) {
OCRTester(TESTING_DIR "/phototest.tif", TESTING_DIR "/phototest.txt", TESSDATA_DIR "_fast",
GetParam());
}
TEST_P(MatchGroundTruth, BestPhototestOCR) {
OCRTester(TESTING_DIR "/phototest.tif", TESTING_DIR "/phototest.txt", TESSDATA_DIR "_best",
GetParam());
}
TEST_P(MatchGroundTruth, TessPhototestOCR) {
OCRTester(TESTING_DIR "/phototest.tif", TESTING_DIR "/phototest.txt", TESSDATA_DIR, GetParam());
}
INSTANTIATE_TEST_SUITE_P(Eng, MatchGroundTruth, ::testing::Values("eng"));
INSTANTIATE_TEST_SUITE_P(DISABLED_Latin, MatchGroundTruth, ::testing::Values("script/Latin"));
INSTANTIATE_TEST_SUITE_P(DISABLED_Deva, MatchGroundTruth, ::testing::Values("script/Devanagari"));
INSTANTIATE_TEST_SUITE_P(DISABLED_Arabic, MatchGroundTruth, ::testing::Values("script/Arabic"));
class EuroText : public QuickTest {};
TEST_F(EuroText, FastLatinOCR) {
OCRTester(TESTING_DIR "/eurotext.tif", TESTING_DIR "/eurotext.txt", TESSDATA_DIR "_fast",
"script/Latin");
}
// script/Latin for eurotext.tif does not match groundtruth
// for tessdata & tessdata_best.
// so do not test these here.
} // namespace tesseract
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