tesseract::IndexMapBiDi Class Reference

#include <indexmapbidi.h>

Inheritance diagram for tesseract::IndexMapBiDi:

Public Member Functions
virtual	~IndexMapBiDi ()
void	InitAndSetupRange (int sparse_size, int start, int end)
void	Init (int size, bool all_mapped)
void	SetMap (int sparse_index, bool mapped)
void	Setup ()
bool	Merge (int compact_index1, int compact_index2)
bool	IsCompactDeleted (int index) const
void	CompleteMerges ()
virtual int	SparseToCompact (int sparse_index) const
virtual int	SparseSize () const
void	CopyFrom (const IndexMapBiDi &src)
bool	Serialize (FILE *fp) const
bool	DeSerialize (bool swap, FILE *fp)
int	MapFeatures (const GenericVector< int > &sparse, GenericVector< int > *compact) const
Public Member Functions inherited from tesseract::IndexMap
virtual	~IndexMap ()
int	CompactToSparse (int compact_index) const
int	CompactSize () const
void	CopyFrom (const IndexMap &src)
void	CopyFrom (const IndexMapBiDi &src)
bool	Serialize (FILE *fp) const
bool	DeSerialize (bool swap, FILE *fp)

Additional Inherited Members
Protected Attributes inherited from tesseract::IndexMap
int	sparse_size_
GenericVector< inT32 >	compact_map_

Detailed Description

Definition at line 102 of file indexmapbidi.h.

Constructor & Destructor Documentation

~IndexMapBiDi()

virtual tesseract::IndexMapBiDi::~IndexMapBiDi ( )

inlinevirtual

Definition at line 104 of file indexmapbidi.h.

{}

Member Function Documentation

CompleteMerges()

void tesseract::IndexMapBiDi::CompleteMerges

(

)

Definition at line 153 of file indexmapbidi.cpp.

                                  {
  // Ensure each sparse_map_entry contains a master compact_map_ index.
  int compact_size = 0;
  for (int i = 0; i < sparse_map_.size(); ++i) {
    int compact_index = MasterCompactIndex(sparse_map_[i]);
    sparse_map_[i] = compact_index;
    if (compact_index >= compact_size)
      compact_size = compact_index + 1;
  }
  // Re-generate the compact_map leaving holes for unused indices.
  compact_map_.init_to_size(compact_size, -1);
  for (int i = 0; i < sparse_map_.size(); ++i) {
    if (sparse_map_[i] >= 0) {
      if (compact_map_[sparse_map_[i]] == -1)
        compact_map_[sparse_map_[i]] = i;
    }
  }
  // Compact the compact_map, leaving tmp_compact_map saying where each
  // index went to in the compacted map.
  GenericVector<inT32> tmp_compact_map;
  tmp_compact_map.init_to_size(compact_size, -1);
  compact_size = 0;
  for (int i = 0; i < compact_map_.size(); ++i) {
    if (compact_map_[i] >= 0) {
      tmp_compact_map[i] = compact_size;
      compact_map_[compact_size++] = compact_map_[i];
    }
  }
  compact_map_.truncate(compact_size);
  // Now modify the entries in the sparse map to point to the new locations.
  for (int i = 0; i < sparse_map_.size(); ++i) {
    if (sparse_map_[i] >= 0) {
      sparse_map_[i] = tmp_compact_map[sparse_map_[i]];
    }
  }
}

CopyFrom()

void tesseract::IndexMapBiDi::CopyFrom

(

const IndexMapBiDi &

src

)

Definition at line 112 of file indexmapbidi.cpp.

                                                   {
  sparse_map_ = src.sparse_map_;
  compact_map_ = src.compact_map_;
  sparse_size_ = sparse_map_.size();
}

DeSerialize()

bool tesseract::IndexMapBiDi::DeSerialize	(	bool	swap,
		FILE *	fp
	)

Definition at line 209 of file indexmapbidi.cpp.

                                                  {
  if (!IndexMap::DeSerialize(swap, fp)) return false;
  GenericVector<inT32> remaining_pairs;
  if (!remaining_pairs.DeSerialize(swap, fp)) return false;
  sparse_map_.init_to_size(sparse_size_, -1);
  for (int i = 0; i < compact_map_.size(); ++i) {
    sparse_map_[compact_map_[i]] = i;
  }
  for (int i = 0; i < remaining_pairs.size(); ++i) {
    int sparse_index = remaining_pairs[i++];
    sparse_map_[sparse_index] = remaining_pairs[i];
  }
  return true;
}

Init()

void tesseract::IndexMapBiDi::Init	(	int	size,
		bool	all_mapped
	)

Definition at line 79 of file indexmapbidi.cpp.

                                                 {
  sparse_map_.init_to_size(size, -1);
  if (all_mapped) {
    for (int i = 0; i < size; ++i)
      sparse_map_[i] = i;
  }
}

InitAndSetupRange()

void tesseract::IndexMapBiDi::InitAndSetupRange	(	int	sparse_size,
		int	start,
		int	end
	)

Definition at line 68 of file indexmapbidi.cpp.

                                                                        {
  Init(sparse_size, false);
  for (int i = start; i < end; ++i)
    SetMap(i, true);
  Setup();
}

IsCompactDeleted()

bool tesseract::IndexMapBiDi::IsCompactDeleted ( int  index ) const

inline

Definition at line 130 of file indexmapbidi.h.

                                         {
    return MasterCompactIndex(index) < 0;
  }

MapFeatures()

int tesseract::IndexMapBiDi::MapFeatures	(	const GenericVector< int > &	sparse,
		GenericVector< int > *	compact
	)		const

Definition at line 229 of file indexmapbidi.cpp.

                                                                 {
  compact->truncate(0);
  int num_features = sparse.size();
  int missed_features = 0;
  int prev_good_feature = -1;
  for (int f = 0; f < num_features; ++f) {
    int feature = sparse_map_[sparse[f]];
    if (feature >= 0) {
      if (feature != prev_good_feature) {
        compact->push_back(feature);
        prev_good_feature = feature;
      }
    } else {
      ++missed_features;
    }
  }
  return missed_features;
}

Merge()

bool tesseract::IndexMapBiDi::Merge	(	int	compact_index1,
		int	compact_index2
	)

Definition at line 121 of file indexmapbidi.cpp.

                                                               {
  // Find the current master index for index1 and index2.
  compact_index1 = MasterCompactIndex(compact_index1);
  compact_index2 = MasterCompactIndex(compact_index2);
  // Be sure that index1 < index2.
  if (compact_index1 > compact_index2) {
    int tmp = compact_index1;
    compact_index1 = compact_index2;
    compact_index2 = tmp;
  } else if (compact_index1 == compact_index2) {
    return false;
  }
  // To save iterating over all sparse_map_ entries, simply make the master
  // entry for index2 point to index1.
  // This leaves behind a potential chain of parents that needs to be chased,
  // as above.
  sparse_map_[compact_map_[compact_index2]] = compact_index1;
  if (compact_index1 >= 0)
    compact_map_[compact_index2] = compact_map_[compact_index1];
  return true;
}

Serialize()

bool tesseract::IndexMapBiDi::Serialize

(

FILE *

fp

)

const

Definition at line 191 of file indexmapbidi.cpp.

                                           {
  if (!IndexMap::Serialize(fp)) return false;
  // Make a vector containing the rest of the map. If the map is many-to-one
  // then each additional sparse entry needs to be stored.
  // Normally we store only the compact map to save space.
  GenericVector<inT32> remaining_pairs;
  for (int i = 0; i < sparse_map_.size(); ++i) {
    if (sparse_map_[i] >= 0 && compact_map_[sparse_map_[i]] != i) {
      remaining_pairs.push_back(i);
      remaining_pairs.push_back(sparse_map_[i]);
    }
  }
  if (!remaining_pairs.Serialize(fp)) return false;
  return true;
}

SetMap()

void tesseract::IndexMapBiDi::SetMap	(	int	sparse_index,
		bool	mapped
	)

Definition at line 88 of file indexmapbidi.cpp.

                                                       {
  sparse_map_[sparse_index] = mapped ? 0 : -1;
}

Setup()

void tesseract::IndexMapBiDi::Setup

(

)

Definition at line 95 of file indexmapbidi.cpp.

                         {
  int compact_size = 0;
  for (int i = 0; i < sparse_map_.size(); ++i) {
    if (sparse_map_[i] >= 0) {
      sparse_map_[i] = compact_size++;
    }
  }
  compact_map_.init_to_size(compact_size, -1);
  for (int i = 0; i < sparse_map_.size(); ++i) {
    if (sparse_map_[i] >= 0) {
      compact_map_[sparse_map_[i]] = i;
    }
  }
  sparse_size_ = sparse_map_.size();
}

SparseSize()

virtual int tesseract::IndexMapBiDi::SparseSize ( ) const

inlinevirtual

Reimplemented from tesseract::IndexMap.

Definition at line 142 of file indexmapbidi.h.

                                 {
    return sparse_map_.size();
  }

SparseToCompact()

virtual int tesseract::IndexMapBiDi::SparseToCompact ( int  sparse_index ) const

inlinevirtual

Reimplemented from tesseract::IndexMap.

Definition at line 138 of file indexmapbidi.h.

                                                      {
    return sparse_map_[sparse_index];
  }

---

The documentation for this class was generated from the following files:

• /home/stefan/src/github/tesseract-ocr/tesseract/ccutil/indexmapbidi.h
• /home/stefan/src/github/tesseract-ocr/tesseract/ccutil/indexmapbidi.cpp