!752

static S imageID = "#1004061";

!include #1004250 // Eye

!include #1004067 // XRecognizableImage

static File infoFile;
static InputImage inputImage;
static ImageInfo ii;
static XRecognizableImage ri;
static ImageReader recognizer;
static volatile L<DebugItem> debugItems;
static JRecognizedText textArea;
sbool triggerRecog;
volatile sbool recognizing;

p {
  RGBImage img = new RGBImage(loadImg(imageID));
  
  // load imageInfo
  ii = new ImageInfo;
  infoFile = getProgramFile("imageInfo.tree");
  S iitext = loadTextFile(infoFile);
  if (nempty(iitext))
    ii.getTree().set(Tree.parse(iitext));
  
  ri = new XRecognizableImage;
  ri.imageInfo = ii;
  ri.setImage(img);
  ri.setDrawMarkLines(true);
  ri.setCorrections(ii.getCorrections());
  
  inputImage = new InputImage(img.toBW());
  
  textArea = new JRecognizedText;
  loadRecognizer();
  if (recognizer == null)
    recognizer = new SaR(new LineFinder, new FlexibleSegmenter, new CompareImages);

  recog(recognizer);  

  learnCorrections();
  
  recog(recognizer);
  
  JFrame frame = showFrame(centerAndSouth(vgrid(ri, textArea),
    null /*jbutton("Recognize again", r { recog(); })*/));
    
  swingTimer(frame, 100, r{
    if (triggerRecog && !recognizing) { triggerRecog = false; recogInBackground(); }
  });
}

svoid saveImageInfo() {
  saveTextFile(infoFile, ii.getTree().toString());
  ri.setCorrections(ii.getCorrections());
  ri.repaintImageSurface();
}

svoid recognizerModified() {
  S s = recognizer.getDescription();
  saveTextFile(getProgramFile("recognizer.tree"), s);
  print("Saved recognizer (" + l(s) + " chars)");
  triggerRecog = true;
}

svoid loadRecognizer() {
  S s = loadTextFile(getProgramFile("recognizer.tree"));
  if (nempty(s))
    recognizer = OCRUtil.makeImageReader(s);
}

svoid learnCorrections() {
  S desc = recognizer.getDescription();
  CharacterLearner characterLearner = recognizer.getCharacterLearner();
  if (characterLearner != null)
    for (Correction c : ii.getCorrections()) {
      Rectangle r = c.getRectangle();
      Point p = new Point(r.x+r.width/2, r.y+r.height/2);
      Subrecognition subrecognition = findSubrecognition(p);
      continue if subrecognition == null;
      ImageWithMarkLines imageWithMarkLines =
        new ImageWithMarkLines(subrecognition.image,
          subrecognition.topLine, subrecognition.baseLine);
      characterLearner.learnCharacter(imageWithMarkLines, c.getText());
    }
  if (neq(recognizer.getDescription(), desc))
    recognizerModified();
}

static Subrecognition findSubrecognition(Point p) {
  for (DebugItem item : debugItems)
    if (item.data instanceof Subrecognition) {
      Subrecognition s = (Subrecognition) item.data;
      Rectangle r = new Rectangle(s.clip);
      r.grow(1, 1);
      if (r.contains(p))
        return s;
    }
  null;
}

svoid recog(ImageReader rec) {
  long t = now();
  // do it!
  rec.setCollectDebugInfo(true);
  RecognizedText rt;
  time {
    rt = rec.extendedReadImage(inputImage);
  }
  
  debugItems = rec.getDebugInfo();
  done(t, "recog");
  recogDone(rt);
}

static ImageReader cloneRecognizer(ImageReader recognizer) {
  ret OCRUtil.makeImageReader(recognizer.getDescription());
}

svoid recogDone(final RecognizedText rt) {
  awtIfNecessary {
    print("Debug items: " + l(debugItems));
    ri.setDebugInfo(debugItems);
    
    S text = rt != null ? rt.text : "";
    textArea.setText(text, debugItems);
    
    ri.repaintImageSurface();
  }
}

svoid recogInBackground() {
  recognizing = true;
  final ImageReader rec = cloneRecognizer(recognizer);
  thread "Recognizing" {
    try {
      recog(rec);
    } finally {
      recognizing = false;
    }
  }
}

Began life as a copy of #1004066