tesseract::PixelHistogram Class Reference

#include <devanagari_processing.h>

Public Member Functions
	PixelHistogram ()
	~PixelHistogram ()
void	Clear ()
int *	hist () const
int	length () const
void	ConstructVerticalCountHist (Pix *pix)
void	ConstructHorizontalCountHist (Pix *pix)
int	GetHistogramMaximum (int *count) const

Detailed Description

Definition at line 35 of file devanagari_processing.h.

Constructor & Destructor Documentation

tesseract::PixelHistogram::PixelHistogram ( )

inline

Definition at line 37 of file devanagari_processing.h.

                   {
    hist_ = NULL;
    length_ = 0;
  }

tesseract::PixelHistogram::~PixelHistogram ( )

inline

Definition at line 42 of file devanagari_processing.h.

                    {
    Clear();
  }

Member Function Documentation

void tesseract::PixelHistogram::Clear ( )

inline

Definition at line 46 of file devanagari_processing.h.

               {
    if (hist_) {
      delete[] hist_;
    }
    length_ = 0;
  }

void tesseract::PixelHistogram::ConstructHorizontalCountHist

(

Pix *

pix

)

Definition at line 489 of file devanagari_processing.cpp.

                                                          {
  Clear();
  Numa* counts = pixCountPixelsByRow(pix, NULL);
  length_ = numaGetCount(counts);
  hist_ = new int[length_];
  for (int i = 0; i < length_; ++i) {
    l_int32 val = 0;
    numaGetIValue(counts, i, &val);
    hist_[i] = val;
  }
  numaDestroy(&counts);
}

void tesseract::PixelHistogram::ConstructVerticalCountHist

(

Pix *

pix

)

Definition at line 471 of file devanagari_processing.cpp.

                                                        {
  Clear();
  int width = pixGetWidth(pix);
  int height = pixGetHeight(pix);
  hist_ = new int[width];
  length_ = width;
  int wpl = pixGetWpl(pix);
  l_uint32 *data = pixGetData(pix);
  for (int i = 0; i < width; ++i)
    hist_[i] = 0;
  for (int i = 0; i < height; ++i) {
    l_uint32 *line = data + i * wpl;
    for (int j = 0; j < width; ++j)
      if (GET_DATA_BIT(line, j))
        ++(hist_[j]);
  }
}

int tesseract::PixelHistogram::GetHistogramMaximum

(

int *

count

)

const

Definition at line 457 of file devanagari_processing.cpp.

                                                        {
  int best_value = 0;
  for (int i = 0; i < length_; ++i) {
    if (hist_[i] > hist_[best_value]) {
      best_value = i;
    }
  }
  if (count) {
    *count = hist_[best_value];
  }
  return best_value;
}

int* tesseract::PixelHistogram::hist ( ) const

inline

Definition at line 53 of file devanagari_processing.h.

{ return hist_; }

int tesseract::PixelHistogram::length ( ) const

inline

Definition at line 55 of file devanagari_processing.h.

                     {
    return length_;
  }

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

• textord/devanagari_processing.h
• textord/devanagari_processing.cpp