91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
#include "Recognizer.h"
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#include <tesseract/baseapi.h>
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#include <QDebug>
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#include <QSettings>
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#include "Settings.h"
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#include "ImageProcessing.h"
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#include "StAssert.h"
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#include "RecognizerHelper.h"
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Recognizer::Recognizer (QObject *parent) :
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QObject (parent),
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engine_ (NULL), recognizerHelper_ (new RecognizerHelper), imageScale_ (0) {
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applySettings ();
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}
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void Recognizer::applySettings () {
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QSettings settings;
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settings.beginGroup (settings_names::recogntionGroup);
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recognizerHelper_->load ();
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tessDataDir_ = settings.value (settings_names::tessDataPlace,
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settings_values::tessDataPlace).toString ();
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if (tessDataDir_.right (1) != "/") {
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tessDataDir_ += "/";
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}
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ocrLanguage_ = settings.value (settings_names::ocrLanguage,
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settings_values::ocrLanguage).toString ();
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imageScale_ = settings.value (settings_names::imageScale,
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settings_values::imageScale).toInt ();
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initEngine (engine_, ocrLanguage_);
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}
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bool Recognizer::initEngine (tesseract::TessBaseAPI * &engine, const QString &language) {
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if (tessDataDir_.isEmpty () || language.isEmpty ()) {
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emit error (tr ("Неверные параметры для OCR"));
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return false;
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}
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if (engine != NULL) {
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delete engine;
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}
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engine = new tesseract::TessBaseAPI ();
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int result = engine->Init (qPrintable (tessDataDir_), qPrintable (language),
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tesseract::OEM_DEFAULT);
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if (result != 0) {
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emit error (tr ("Ошибка инициализации OCR: %1").arg (result));
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delete engine;
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engine = NULL;
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return false;
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}
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return true;
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}
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void Recognizer::recognize (ProcessingItem item) {
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ST_ASSERT (!item.source.isNull ());
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bool isCustomLanguage = (!item.ocrLanguage.isEmpty () &&
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item.ocrLanguage != ocrLanguage_);
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tesseract::TessBaseAPI *engine = (isCustomLanguage) ? NULL : engine_;
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QString language = (isCustomLanguage) ? item.ocrLanguage : ocrLanguage_;
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if (engine == NULL) {
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if (!initEngine (engine, language)) {
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return;
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}
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}
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Pix *image = prepareImage (item.source.toImage (), imageScale_);
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ST_ASSERT (image != NULL);
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engine->SetImage (image);
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char *outText = engine->GetUTF8Text ();
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engine->Clear ();
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cleanupImage (&image);
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QString result = QString (outText).trimmed ();
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delete [] outText;
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if (isCustomLanguage) {
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delete engine;
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}
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if (!result.isEmpty ()) {
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item.recognized = recognizerHelper_->substitute (result, language);
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emit recognized (item);
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}
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else {
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emit error (tr ("Текст не распознан."));
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}
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}
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