mirror of
https://github.com/tesseract-ocr/tesseract.git
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120 lines
4.5 KiB
C++
120 lines
4.5 KiB
C++
///////////////////////////////////////////////////////////////////////
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// File: apiexample_test.cc
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// Description: Api Test for Tesseract using text fixtures and parameters.
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// Tests for Devanagari, Latin and Arabic scripts are disabled by default.
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// Disabled tests can be run when required by using the
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// --gtest_also_run_disabled_tests argument.
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// ./unittest/apiexample_test --gtest_also_run_disabled_tests
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//
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// Author: ShreeDevi Kumar
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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///////////////////////////////////////////////////////////////////////
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// expects clone of tessdata_fast repo in ../../tessdata_fast
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//#include "log.h"
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#include <time.h>
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#include <fstream>
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#include <iostream>
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#include <locale>
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#include <memory> // std::unique_ptr
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#include <string>
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#include <tesseract/baseapi.h>
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#include "include_gunit.h"
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#include "allheaders.h"
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namespace {
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class QuickTest : public testing::Test {
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protected:
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virtual void SetUp() { start_time_ = time(nullptr); }
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virtual void TearDown() {
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#if defined(DEBUG)
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// Debug builds can be very slow, so allow 4 min for OCR of a test image.
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// apitest_example including disabled tests takes about 18 min on ARMv7.
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const time_t MAX_SECONDS_FOR_TEST = 240;
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#else
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// Release builds typically need less than 10 s for OCR of a test image,
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// apitest_example including disabled tests takes about 90 s on ARMv7.
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const time_t MAX_SECONDS_FOR_TEST = 55;
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#endif
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const time_t end_time = time(nullptr);
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EXPECT_TRUE(end_time - start_time_ <= MAX_SECONDS_FOR_TEST)
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<< "The test took too long - "
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<< ::testing::PrintToString(end_time - start_time_);
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}
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time_t start_time_;
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};
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void OCRTester(const char* imgname, const char* groundtruth,
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const char* tessdatadir, const char* lang) {
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// log.info() << tessdatadir << " for language: " << lang << std::endl;
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char* outText;
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std::locale loc("C"); // You can also use "" for the default system locale
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std::ifstream file(groundtruth);
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file.imbue(loc); // Use it for file input
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std::string gtText((std::istreambuf_iterator<char>(file)),
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std::istreambuf_iterator<char>());
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std::unique_ptr<tesseract::TessBaseAPI> api(new tesseract::TessBaseAPI());
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ASSERT_FALSE(api->Init(tessdatadir, lang))
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<< "Could not initialize tesseract.";
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Pix* image = pixRead(imgname);
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ASSERT_TRUE(image != nullptr) << "Failed to read test image.";
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api->SetImage(image);
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outText = api->GetUTF8Text();
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EXPECT_EQ(gtText, outText)
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<< "Phototest.tif OCR does not match ground truth for "
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<< ::testing::PrintToString(lang);
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api->End();
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delete[] outText;
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pixDestroy(&image);
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}
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class MatchGroundTruth : public QuickTest,
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public ::testing::WithParamInterface<const char*> {};
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TEST_P(MatchGroundTruth, FastPhototestOCR) {
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OCRTester(TESTING_DIR "/phototest.tif", TESTING_DIR "/phototest.txt",
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TESSDATA_DIR "_fast", GetParam());
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}
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TEST_P(MatchGroundTruth, BestPhototestOCR) {
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OCRTester(TESTING_DIR "/phototest.tif", TESTING_DIR "/phototest.txt",
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TESSDATA_DIR "_best", GetParam());
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}
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TEST_P(MatchGroundTruth, TessPhototestOCR) {
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OCRTester(TESTING_DIR "/phototest.tif", TESTING_DIR "/phototest.txt",
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TESSDATA_DIR, GetParam());
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}
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INSTANTIATE_TEST_CASE_P(Eng, MatchGroundTruth, ::testing::Values("eng"));
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INSTANTIATE_TEST_CASE_P(DISABLED_Latin, MatchGroundTruth,
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::testing::Values("script/Latin"));
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INSTANTIATE_TEST_CASE_P(DISABLED_Deva, MatchGroundTruth,
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::testing::Values("script/Devanagari"));
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INSTANTIATE_TEST_CASE_P(DISABLED_Arabic, MatchGroundTruth,
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::testing::Values("script/Arabic"));
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class EuroText : public QuickTest {};
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TEST_F(EuroText, FastLatinOCR) {
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OCRTester(TESTING_DIR "/eurotext.tif", TESTING_DIR "/eurotext.txt",
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TESSDATA_DIR "_fast", "script/Latin");
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}
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// script/Latin for eurotext.tif does not match groundtruth
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// for tessdata & tessdata_best.
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// so do not test these here.
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} // namespace
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