mfx.h File Reference

#include "params.h"

Go to the source code of this file.

Functions
CHAR_FEATURES	BlobMicroFeatures (TBLOB *Blob, const DENORM &denorm)

Variables
double	classify_min_slope = 0.414213562
double	classify_max_slope = 2.414213562

Function Documentation

CHAR_FEATURES BlobMicroFeatures	(	TBLOB *	Blob,
		const DENORM &	denorm
	)

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Public Function Prototypes

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Public Code

Definition at line 62 of file mfx.cpp.

                                                                   {
/*
 **      Parameters:
 **              Blob            blob to extract micro-features from
 **              denorm          control parameter to feature extractor
 **      Operation:
 **              This routine extracts micro-features from the specified
 **              blob and returns a list of the micro-features.  All
 **              micro-features are normalized according to the specified
 **              line statistics.
 **      Return: List of micro-features extracted from the blob.
 **      Exceptions: none
 **      History: 7/21/89, DSJ, Created.
 */
  MICROFEATURES MicroFeatures = NIL_LIST;
  FLOAT32 XScale, YScale;
  LIST Outlines;
  LIST RemainingOutlines;
  MFOUTLINE Outline;
  INT_FEATURE_ARRAY blfeatures;
  INT_FEATURE_ARRAY cnfeatures;
  INT_FX_RESULT_STRUCT results;

  if (Blob != NULL) {
    Outlines = ConvertBlob (Blob);
    if (!ExtractIntFeat(Blob, denorm, blfeatures, cnfeatures, &results))
      return NULL;
    XScale = 0.2f / results.Ry;
    YScale = 0.2f / results.Rx;

    RemainingOutlines = Outlines;
    iterate(RemainingOutlines) {
      Outline = (MFOUTLINE) first_node (RemainingOutlines);
      CharNormalizeOutline (Outline,
        results.Xmean, results.Ymean,
        XScale, YScale);
    }

    RemainingOutlines = Outlines;
    iterate(RemainingOutlines) {
      Outline = (MFOUTLINE) first_node (RemainingOutlines);
      FindDirectionChanges(Outline, classify_min_slope, classify_max_slope);
      MarkDirectionChanges(Outline);
      MicroFeatures = ConvertToMicroFeatures (Outline, MicroFeatures);
    }
    FreeOutlines(Outlines);
  }
  return ((CHAR_FEATURES) MicroFeatures);
}                                /* BlobMicroFeatures */

Variable Documentation

double classify_max_slope = 2.414213562

"Slope above which lines are called vertical"

Definition at line 39 of file mfx.cpp.

double classify_min_slope = 0.414213562

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Include Files and Type Defines

Variables

"Slope below which lines are called horizontal"

Definition at line 37 of file mfx.cpp.