Function ConvertToOutlineFeatures

deps/tesseract/classify/outfeat.cpp:122–148

---------------------------------------------------------------------------*/ * This routine steps converts each section in the specified * outline to a feature described by its x,y position, length * and angle. * @param Outline outline to extract outline-features from * @param FeatureSet set of features to add outline-features to * @return none (results are returned in FeatureSet) * @note G

 * - 5/24/91, DSJ, Added hidden edge capability.
 */
void ConvertToOutlineFeatures(MFOUTLINE Outline, FEATURE_SET FeatureSet) {
  MFOUTLINE Next;
  MFOUTLINE First;
  FPOINT FeatureStart;
  FPOINT FeatureEnd;

  if (DegenerateOutline (Outline))
    return;

  First = Outline;
  Next = First;
  do {
    FeatureStart = PointAt(Next)->Point;
    Next = NextPointAfter(Next);

    /* note that an edge is hidden if the ending point of the edge is
       marked as hidden.  This situation happens because the order of
       the outlines is reversed when they are converted from the old
       format.  In the old format, a hidden edge is marked by the
       starting point for that edge. */
    if (!PointAt(Next)->Hidden) {
      FeatureEnd = PointAt(Next)->Point;
      AddOutlineFeatureToSet(&FeatureStart, &FeatureEnd, FeatureSet);
    }
  }
  while (Next != First);
}                                /* ConvertToOutlineFeatures */


/*---------------------------------------------------------------------------*/