Exemple #1
0
void ofxOcrad::doOCR()
{
	OCRAD_Descriptor * od;
	char str[1024];
	const unsigned char invert = 1;
	int blocknum, linenum;
	od = OCRAD_open();
	OCRAD_set_image(od, &pixmap, 0);
	OCRAD_get_errno(od);
	OCRAD_recognize(od, 1);
	blocknum = OCRAD_result_blocks(od);
	
	int pos = 0;
	for(int i=0; i<blocknum; i++){
		linenum = OCRAD_result_lines(od, i);
		
		for(int j=0; j<linenum; j++){
			sprintf(&str[pos],  "%s\n", OCRAD_result_line(od,i,j));
			pos = pos + strlen(OCRAD_result_line(od,i,j));
		}
	}
	strcpy(str_result, str);
	OCRAD_close(od);

}
Exemple #2
0
// Function: osra_ocrad_ocr()
//      Make an attempt to OCR the image box with OCRAD engine.
//
// Parameters:
//      ocrad_pixmap - includes pixel map and the image mode
//      char_filter - character filter
//
// Returns:
//      0 in case the recognition failed or valid alphanumeric character
char osra_ocrad_ocr(const OCRAD_Pixmap * const ocrad_pixmap, const string &char_filter)
{
  char result = 0;
  string line;

  OCRAD_Descriptor * const ocrad_res = OCRAD_open();

  // If the box height is less than 10px, it should be scaled up a bit, otherwise OCRAD is unable to catch it:
  if (ocrad_res && OCRAD_get_errno(ocrad_res) == OCRAD_ok && OCRAD_set_image(ocrad_res, ocrad_pixmap, 0) == 0
      && (ocrad_pixmap->height >= 10 || OCRAD_scale(ocrad_res, 2) == 0) && OCRAD_recognize(ocrad_res, 0) == 0)
    {
      result = OCRAD_result_first_character(ocrad_res);
      if (OCRAD_result_blocks(ocrad_res) >= 1 && OCRAD_result_lines(ocrad_res, 0) && OCRAD_result_line(
            ocrad_res, 0, 0) != 0)
        line = OCRAD_result_line(ocrad_res, 0, 0);
    }

  OCRAD_close(ocrad_res);

  // TODO: Why line should have 0 or 1 characters? Give examples...
  if (line.length() > 2 || !isalnum(result) || (!char_filter.empty() && char_filter.find(result, 0) == string::npos))
    return UNKNOWN_CHAR;

  return result;
}