mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-13 07:59:04 +08:00
4ec9c86226
Signed-off-by: Stefan Weil <sw@weilnetz.de>
206 lines
6.9 KiB
C++
206 lines
6.9 KiB
C++
//
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// Unit test to run Tesseract and Cube instances in parallel threads and verify
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// the OCR result.
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// Note that success of running this test as-is does NOT verify
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// thread-safety. For that, you need to run the this binary under TSAN using the
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// associated baseapi_thread_test_with_tsan.sh script.
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//
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// The tests are partitioned by instance to allow running Tesseract/Cube/both
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// and by stage to run initialization/recognition/both. See flag descriptions
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// for details.
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#include <memory>
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#include <string>
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#include "leptonica/include/allheaders.h"
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#include "tesseract/api/baseapi.h"
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#include "thread/threadpool.h"
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// Run with Tesseract instances.
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DEFINE_bool(test_tesseract, true, "Test tesseract instances");
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// Run with Cube instances.
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// Note that with TSAN, Cube typically takes much longer to test. Ignoring
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// std::string operations using the associated tess_tsan.ignore file when
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// testing Cube significantly reduces testing time.
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DEFINE_bool(test_cube, true, "Test Cube instances");
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// When used with TSAN, having more repetitions can help in finding hidden
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// thread-safety violations at the expense of increased testing time.
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DEFINE_int32(reps, 1, "Num of parallel test repetitions to run.");
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DEFINE_int32(max_concurrent_instances, 0,
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"Maximum number of instances to run in parallel at any given "
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"instant. The number of concurrent instances cannot exceed "
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"reps * number_of_langs_tested, which is also the default value.");
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using tesseract::TessBaseAPI;
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namespace {
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const char* kTessLangs[] = {"eng", "vie", nullptr};
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const char* kTessImages[] = {"HelloGoogle.tif", "viet.tif", nullptr};
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const char* kTessTruthText[] = {"Hello Google", "\x74\x69\xe1\xba\xbf\x6e\x67",
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nullptr};
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const char* kCubeLangs[] = {"hin", "ara", nullptr};
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const char* kCubeImages[] = {"raaj.tif", "arabic.tif", nullptr};
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const char* kCubeTruthText[] = {
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"\xe0\xa4\xb0\xe0\xa4\xbe\xe0\xa4\x9c",
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"\xd8\xa7\xd9\x84\xd8\xb9\xd8\xb1\xd8\xa8\xd9\x8a", nullptr};
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class BaseapiThreadTest : public ::testing::Test {
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protected:
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static void SetUpTestCase() {
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CHECK(FLAGS_test_tesseract || FLAGS_test_cube)
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<< "Need to test at least one of Tesseract/Cube!";
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// Form a list of langs/gt_text/image_files we will work with.
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std::vector<string> image_files;
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if (FLAGS_test_tesseract) {
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int i = 0;
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while (kTessLangs[i] && kTessTruthText[i] && kTessImages[i]) {
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langs_.push_back(kTessLangs[i]);
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gt_text_.push_back(kTessTruthText[i]);
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image_files.push_back(kTessImages[i]);
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++i;
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}
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LOG(INFO) << "Testing Tesseract on " << i << " languages.";
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}
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if (FLAGS_test_cube) {
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int i = 0;
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while (kCubeLangs[i] && kCubeTruthText[i] && kCubeImages[i]) {
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langs_.push_back(kCubeLangs[i]);
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gt_text_.push_back(kCubeTruthText[i]);
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image_files.push_back(kCubeImages[i]);
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++i;
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}
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LOG(INFO) << "Testing Cube on " << i << " languages.";
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}
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num_langs_ = langs_.size();
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// Pre-load the images into an array. We will be making multiple copies of
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// an image here if FLAGS_reps > 1 and that is intentional. In this test, we
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// wish to not make any assumptions about the thread-safety of Pix objects,
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// and so entirely disallow concurrent access of a Pix instance.
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const int n = num_langs_ * FLAGS_reps;
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for (int i = 0; i < n; ++i) {
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string path =
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FLAGS_test_srcdir + "/testdata/" + image_files[i % num_langs_];
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Pix* new_pix = pixRead(path.c_str());
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QCHECK(new_pix != nullptr) << "Could not read " << path;
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pix_.push_back(new_pix);
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}
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pool_size_ = (FLAGS_max_concurrent_instances < 1)
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? num_langs_ * FLAGS_reps
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: FLAGS_max_concurrent_instances;
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}
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static void TearDownTestCase() {
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for (int i = 0; i < pix_.size(); ++i) {
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pixDestroy(&pix_[i]);
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}
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}
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void ResetPool() {
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pool_.reset(new ThreadPool(pool_size_));
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pool_->StartWorkers();
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}
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void WaitForPoolWorkers() { pool_.reset(nullptr); }
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std::unique_ptr<ThreadPool> pool_;
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static int pool_size_;
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static std::vector<Pix*> pix_;
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static std::vector<string> langs_;
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static std::vector<string> gt_text_;
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static int num_langs_;
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};
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// static member variable declarations.
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int BaseapiThreadTest::pool_size_;
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std::vector<Pix*> BaseapiThreadTest::pix_;
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std::vector<string> BaseapiThreadTest::langs_;
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std::vector<string> BaseapiThreadTest::gt_text_;
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int BaseapiThreadTest::num_langs_;
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void InitTessInstance(TessBaseAPI* tess, const string& lang) {
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CHECK(tess != nullptr);
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const string kTessdataPath = file::JoinPath(FLAGS_test_srcdir, "tessdata");
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EXPECT_EQ(0, tess->Init(kTessdataPath.c_str(), lang.c_str()));
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}
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void GetCleanedText(TessBaseAPI* tess, Pix* pix, string* ocr_text) {
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tess->SetImage(pix);
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char* result = tess->GetUTF8Text();
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*ocr_text = result;
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delete[] result;
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absl::StripAsciiWhitespace(ocr_text);
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}
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void VerifyTextResult(TessBaseAPI* tess, Pix* pix, const string& lang,
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const string& expected_text) {
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TessBaseAPI* tess_local = nullptr;
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if (tess) {
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tess_local = tess;
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} else {
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tess_local = new TessBaseAPI;
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InitTessInstance(tess_local, lang);
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}
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string ocr_text;
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GetCleanedText(tess_local, pix, &ocr_text);
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EXPECT_STREQ(expected_text.c_str(), ocr_text.c_str());
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if (tess_local != tess) delete tess_local;
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}
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// Check that Tesseract/Cube produce the correct results in single-threaded
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// operation. If not, it is pointless to run the real multi-threaded tests.
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TEST_F(BaseapiThreadTest, TestBasicSanity) {
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for (int i = 0; i < num_langs_; ++i) {
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TessBaseAPI tess;
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InitTessInstance(&tess, langs_[i]);
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string ocr_text;
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GetCleanedText(&tess, pix_[i], &ocr_text);
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CHECK_STREQ(gt_text_[i].c_str(), ocr_text.c_str())
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<< "Failed with lang = " << langs_[i];
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}
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}
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// Test concurrent instance initialization.
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TEST_F(BaseapiThreadTest, TestInit) {
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const int n = num_langs_ * FLAGS_reps;
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ResetPool();
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std::vector<TessBaseAPI> tess(n);
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for (int i = 0; i < n; ++i) {
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pool_->Add(NewCallback(InitTessInstance, &tess[i], langs_[i % num_langs_]));
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}
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WaitForPoolWorkers();
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}
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// Test concurrent recognition.
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TEST_F(BaseapiThreadTest, TestRecognition) {
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const int n = num_langs_ * FLAGS_reps;
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std::vector<TessBaseAPI> tess(n);
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// Initialize api instances in a single thread.
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for (int i = 0; i < n; ++i) {
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InitTessInstance(&tess[i], langs_[i % num_langs_]);
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}
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ResetPool();
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for (int i = 0; i < n; ++i) {
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pool_->Add(NewCallback(VerifyTextResult, &tess[i], pix_[i],
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langs_[i % num_langs_], gt_text_[i % num_langs_]));
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}
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WaitForPoolWorkers();
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}
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TEST_F(BaseapiThreadTest, TestAll) {
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const int n = num_langs_ * FLAGS_reps;
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ResetPool();
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for (int i = 0; i < n; ++i) {
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pool_->Add(NewCallback(VerifyTextResult, nullptr, pix_[i],
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langs_[i % num_langs_], gt_text_[i % num_langs_]));
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}
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WaitForPoolWorkers();
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}
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} // namespace
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