intmatcher.cpp

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                              ConfigMask,
                              NumFeatures,
                              Features,
                              Debug);
#endif

  IMUpdateSumOfProtoEvidences(ClassTemplate,
                              ConfigMask,
                              SumOfFeatureEvidence,
                              ProtoEvidence,
                              NumFeatures);

  IMNormalizeSumOfEvidences(ClassTemplate,
                            SumOfFeatureEvidence,
                            NumFeatures,
                            used_features);

  BestMatch =
    IMFindBestMatch(ClassTemplate,
                    SumOfFeatureEvidence,
                    BlobLength,
                    NormalizationFactor,
                    Result);

#ifndef GRAPHICS_DISABLED
  if (PrintMatchSummaryOn (Debug))
    IMDebugBestMatch(BestMatch, Result, BlobLength, NormalizationFactor);

  if (MatchDebuggingOn (Debug))
    cprintf ("Match Complete --------------------------------------------\n");
#endif

}


/*---------------------------------------------------------------------------*/
int FindGoodProtos(INT_CLASS ClassTemplate,
                   BIT_VECTOR ProtoMask,
                   BIT_VECTOR ConfigMask,
                   UINT16 BlobLength,
                   INT16 NumFeatures,
                   INT_FEATURE_ARRAY Features,
                   PROTO_ID *ProtoArray,
                   int Debug) {
/*
 **      Parameters:
 **              ClassTemplate             Prototypes & tables for a class
 **              ProtoMask                 AND Mask for proto word
 **              ConfigMask                AND Mask for config word
 **              BlobLength                Length of unormalized blob
 **              NumFeatures               Number of features in blob
 **              Features                  Array of features
 **              ProtoArray                Array of good protos
 **              Debug                     Debugger flag: 1=debugger on
 **      Globals:
 **              LocalMatcherMultiplier    Normalization factor multiplier
 **              IntThetaFudge             Theta fudge factor used for
 **                                        evidence calculation
 **              AdaptProtoThresh          Threshold for good protos
 **      Operation:
 **              FindGoodProtos finds all protos whose normalized proto-evidence
 **              exceed AdaptProtoThresh.  The list is ordered by increasing
 **              proto id number.
 **      Return:
 **              Number of good protos in ProtoArray.
 **      Exceptions: none
 **      History: Tue Mar 12 17:09:26 MST 1991, RWM, Created
 */
  static UINT8 FeatureEvidence[MAX_NUM_CONFIGS];
  static int SumOfFeatureEvidence[MAX_NUM_CONFIGS];
  static UINT8 ProtoEvidence[MAX_NUM_PROTOS][MAX_PROTO_INDEX];
  int Feature;
  register UINT8 *UINT8Pointer;
  register int ProtoIndex;
  int NumProtos;
  int NumGoodProtos;
  UINT16 ActualProtoNum;
  register int Temp;

  /* DEBUG opening heading */
  if (MatchDebuggingOn (Debug))
    cprintf
      ("Find Good Protos -------------------------------------------\n");

  IMClearTables(ClassTemplate, SumOfFeatureEvidence, ProtoEvidence);

  for (Feature = 0; Feature < NumFeatures; Feature++)
    IMUpdateTablesForFeature (ClassTemplate, ProtoMask, ConfigMask, Feature,
      &(Features[Feature]), FeatureEvidence,
      SumOfFeatureEvidence, ProtoEvidence, Debug);

#ifndef GRAPHICS_DISABLED
  if (PrintProtoMatchesOn (Debug) || PrintMatchSummaryOn (Debug))
    IMDebugFeatureProtoError(ClassTemplate,
                             ProtoMask,
                             ConfigMask,
                             SumOfFeatureEvidence,
                             ProtoEvidence,
                             NumFeatures,
                             Debug);
#endif

  /* Average Proto Evidences & Find Good Protos */
  NumProtos = NumIntProtosIn (ClassTemplate);
  NumGoodProtos = 0;
  for (ActualProtoNum = 0; ActualProtoNum < NumProtos; ActualProtoNum++) {
    /* Compute Average for Actual Proto */
    Temp = 0;
    UINT8Pointer = &(ProtoEvidence[ActualProtoNum][0]);
    for (ProtoIndex = LengthForProtoId (ClassTemplate, ActualProtoNum);
      ProtoIndex > 0; ProtoIndex--, UINT8Pointer++)
    Temp += *UINT8Pointer;

    Temp /= LengthForProtoId (ClassTemplate, ActualProtoNum);

    /* Find Good Protos */
    if (Temp >= AdaptProtoThresh) {
      *ProtoArray = ActualProtoNum;
      ProtoArray++;
      NumGoodProtos++;
    }
  }

  if (MatchDebuggingOn (Debug))
    cprintf ("Match Complete --------------------------------------------\n");

  return NumGoodProtos;

}


/*---------------------------------------------------------------------------*/
int FindBadFeatures(INT_CLASS ClassTemplate,
                    BIT_VECTOR ProtoMask,
                    BIT_VECTOR ConfigMask,
                    UINT16 BlobLength,
                    INT16 NumFeatures,
                    INT_FEATURE_ARRAY Features,
                    FEATURE_ID *FeatureArray,
                    int Debug) {
/*
 **      Parameters:
 **              ClassTemplate             Prototypes & tables for a class
 **              ProtoMask                 AND Mask for proto word
 **              ConfigMask                AND Mask for config word
 **              BlobLength                Length of unormalized blob
 **              NumFeatures               Number of features in blob
 **              Features                  Array of features
 **              FeatureArray              Array of bad features
 **              Debug                     Debugger flag: 1=debugger on
 **      Globals:
 **              LocalMatcherMultiplier    Normalization factor multiplier
 **              IntThetaFudge             Theta fudge factor used for
 **                                        evidence calculation
 **              AdaptFeatureThresh        Threshold for bad features
 **      Operation:
 **              FindBadFeatures finds all features whose maximum feature-evidence
 **              was less than AdaptFeatureThresh.  The list is ordered by increasing
 **              feature number.
 **      Return:
 **              Number of bad features in FeatureArray.
 **      Exceptions: none
 **      History: Tue Mar 12 17:09:26 MST 1991, RWM, Created
 */
  static UINT8 FeatureEvidence[MAX_NUM_CONFIGS];
  static int SumOfFeatureEvidence[MAX_NUM_CONFIGS];
  static UINT8 ProtoEvidence[MAX_NUM_PROTOS][MAX_PROTO_INDEX];
  int Feature;
  register UINT8 *UINT8Pointer;
  register int ConfigNum;
  int NumConfigs;
  int NumBadFeatures;
  register int Temp;

  /* DEBUG opening heading */
  if (MatchDebuggingOn (Debug))
    cprintf
      ("Find Bad Features -------------------------------------------\n");

  IMClearTables(ClassTemplate, SumOfFeatureEvidence, ProtoEvidence);

  NumBadFeatures = 0;
  NumConfigs = NumIntConfigsIn (ClassTemplate);
  for (Feature = 0; Feature < NumFeatures; Feature++) {
    IMUpdateTablesForFeature (ClassTemplate, ProtoMask, ConfigMask, Feature,
      &(Features[Feature]), FeatureEvidence,
      SumOfFeatureEvidence, ProtoEvidence, Debug);

    /* Find Best Evidence for Current Feature */
    Temp = 0;
    UINT8Pointer = FeatureEvidence;
    for (ConfigNum = 0; ConfigNum < NumConfigs; ConfigNum++, UINT8Pointer++)
      if (*UINT8Pointer > Temp)
        Temp = *UINT8Pointer;

    /* Find Bad Features */
    if (Temp < AdaptFeatureThresh) {
      *FeatureArray = Feature;
      FeatureArray++;
      NumBadFeatures++;
    }
  }

#ifndef GRAPHICS_DISABLED
  if (PrintProtoMatchesOn (Debug) || PrintMatchSummaryOn (Debug))
    IMDebugFeatureProtoError(ClassTemplate,
                             ProtoMask,
                             ConfigMask,
                             SumOfFeatureEvidence,
                             ProtoEvidence,
                             NumFeatures,
                             Debug);
#endif

  if (MatchDebuggingOn (Debug))
    cprintf ("Match Complete --------------------------------------------\n");

  return NumBadFeatures;

}


/*---------------------------------------------------------------------------*/
void InitIntegerMatcher() {
  int i;
  UINT32 IntSimilarity;
  double Similarity;
  double Evidence;
  double ScaleFactor;

  /* Set default mode of operation of IntegerMatcher */
  SetCharNormMatch();

  /* Initialize table for evidence to similarity lookup */
  for (i = 0; i < SE_TABLE_SIZE; i++) {
    IntSimilarity = i << (27 - SE_TABLE_BITS);
    Similarity = ((double) IntSimilarity) / 65536.0 / 65536.0;
    Evidence = Similarity / SimilarityCenter;
    Evidence *= Evidence;
    Evidence += 1.0;
    Evidence = 1.0 / Evidence;
    Evidence *= 255.0;

    if (SEExponentialMultiplier > 0.0) {
      ScaleFactor = 1.0 - exp (-SEExponentialMultiplier) *
        exp (SEExponentialMultiplier * ((double) i / SE_TABLE_SIZE));
      if (ScaleFactor > 1.0)
        ScaleFactor = 1.0;
      if (ScaleFactor < 0.0)
        ScaleFactor = 0.0;
      Evidence *= ScaleFactor;
    }

    SimilarityEvidenceTable[i] = (UINT8) (Evidence + 0.5);
  }

  /* Initialize evidence computation variables */
  EvidenceTableMask =
    ((1 << EvidenceTableBits) - 1) << (9 - EvidenceTableBits);
  MultTruncShiftBits = (14 - IntEvidenceTruncBits);
  TableTruncShiftBits = (27 - SE_TABLE_BITS - (MultTruncShiftBits << 1));
  EvidenceMultMask = ((1 << IntEvidenceTruncBits) - 1);

}


/*---------------------------------------------------------------------------*/
void InitIntegerMatcherVars() {
  MakeClassPrunerThreshold();
  MakeClassPrunerMultiplier();
  MakeIntegerMatcherMultiplier();
  MakeIntThetaFudge();
  MakeCPCutoffStrength();
  MakeEvidenceTableBits();
  MakeIntEvidenceTruncBits();
  MakeSEExponentialMultiplier();
  MakeSimilarityCenter();
}


/*-------------------------------------------------------------------------*/
void PrintIntMatcherStats(FILE *f) {
  fprintf (f, "protoword_lookups=%d, zero_protowords=%d, proto_shifts=%d\n",
    protoword_lookups, zero_protowords, proto_shifts);
  fprintf (f, "set_proto_bits=%d, config_shifts=%d, set_config_bits=%d\n",
    set_proto_bits, config_shifts, set_config_bits);
}


/*-------------------------------------------------------------------------*/
void SetProtoThresh(FLOAT32 Threshold) {
  AdaptProtoThresh = (int) (255 * Threshold);
  if (AdaptProtoThresh < 0)
    AdaptProtoThresh = 0;
  if (AdaptProtoThresh > 255)
    AdaptProtoThresh = 255;
}


/*---------------------------------------------------------------------------*/
void SetFeatureThresh(FLOAT32 Threshold) {
  AdaptFeatureThresh = (int) (255 * Threshold);
  if (AdaptFeatureThresh < 0)
    AdaptFeatureThresh = 0;
  if (AdaptFeatureThresh > 255)
    AdaptFeatureThresh = 255;
}


/*--------------------------------------------------------------------------*/
void SetBaseLineMatch() {
  LocalMatcherMultiplier = 0;
}


/*--------------------------------------------------------------------------*/
void SetCharNormMatch() {
  LocalMatcherMultiplier = IntegerMatcherMultiplier;
}


/**----------------------------------------------------------------------------
              Private Code
----------------------------------------------------------------------------**/
/*---------------------------------------------------------------------------*/
void
IMClearTables (INT_CLASS ClassTemplate,
int SumOfFeatureEvidence[MAX_NUM_CONFIGS],
UINT8 ProtoEvidence[MAX_NUM_PROTOS][MAX_PROTO_INDEX]) {
/*
 **      Parameters:
 **              SumOfFeatureEvidence  Sum of Feature Evidence Table
 **              NumConfigs            Number of Configurations
 **              ProtoEvidence         Prototype Evidence Table
 **              NumProtos             Number of Prototypes
 **      Globals:
 **      Operation:
 **              Clear SumOfFeatureEvidence and ProtoEvidence tables.
 **      Return:
 **      Exceptions: none
 **      History: Wed Feb 27 14:12:28 MST 1991, RWM, Created.
 */
  register UINT8 *UINT8Pointer;
  register int *IntPointer;
  register int ConfigNum;
  int NumConfigs;
  register UINT16 ProtoNum;
  int NumProtos;
  register int ProtoIndex;

  NumProtos = NumIntProtosIn (ClassTemplate);
  NumConfigs = NumIntConfigsIn (ClassTemplate);

  IntPointer = SumOfFeatureEvidence;
  for (ConfigNum = 0; ConfigNum < NumConfigs; ConfigNum++, IntPointer++)
    *IntPointer = 0;