mf.cpp File Reference

#include "mf.h"
#include "featdefs.h"
#include "mfdefs.h"
#include "mfx.h"
#include <cmath>

Go to the source code of this file.

Functions
FEATURE_SET	ExtractMicros (TBLOB *Blob, const DENORM &cn_denorm)

Function Documentation

ExtractMicros()

FEATURE_SET ExtractMicros	(	TBLOB *	Blob,
		const DENORM &	cn_denorm
	)

Call the old micro-feature extractor and then copy the features into the new format. Then deallocate the old micro-features.

Parameters

Blob	blob to extract micro-features from
cn_denorm	control parameter to feature extractor.

Returns

Micro-features for Blob.

Definition at line 43 of file mf.cpp.

                                                                {
  int NumFeatures;
  MICROFEATURES Features, OldFeatures;
  FEATURE_SET FeatureSet;
  FEATURE Feature;
  MICROFEATURE OldFeature;

  OldFeatures = BlobMicroFeatures(Blob, cn_denorm);
  if (OldFeatures == nullptr)
    return nullptr;
  NumFeatures = count (OldFeatures);
  FeatureSet = NewFeatureSet (NumFeatures);

  Features = OldFeatures;
  iterate(Features) {
    OldFeature = (MICROFEATURE) first_node (Features);
    Feature = NewFeature (&MicroFeatureDesc);
    Feature->Params[MFDirection] = OldFeature[ORIENTATION];
    Feature->Params[MFXPosition] = OldFeature[XPOSITION];
    Feature->Params[MFYPosition] = OldFeature[YPOSITION];
    Feature->Params[MFLength] = OldFeature[MFLENGTH];

    // Bulge features are deprecated and should not be used.  Set to 0.
    Feature->Params[MFBulge1] = 0.0f;
    Feature->Params[MFBulge2] = 0.0f;

#ifndef _WIN32
    // Assert that feature parameters are well defined.
    int i;
    for (i = 0; i < Feature->Type->NumParams; i++) {
      ASSERT_HOST(!std::isnan(Feature->Params[i]));
    }
#endif

    AddFeature(FeatureSet, Feature);
  }
  FreeMicroFeatures(OldFeatures);
  return FeatureSet;
}                                /* ExtractMicros */