tesseract 4.1.1
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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 36 of file devanagari_processing.h.

Constructor & Destructor Documentation

◆ PixelHistogram()

tesseract::PixelHistogram::PixelHistogram ( )
inline

Definition at line 38 of file devanagari_processing.h.

38 {
39 hist_ = nullptr;
40 length_ = 0;
41 }

◆ ~PixelHistogram()

tesseract::PixelHistogram::~PixelHistogram ( )
inline

Definition at line 43 of file devanagari_processing.h.

43 {
44 Clear();
45 }

Member Function Documentation

◆ Clear()

void tesseract::PixelHistogram::Clear ( )
inline

Definition at line 47 of file devanagari_processing.h.

47 {
48 delete[] hist_;
49 length_ = 0;
50 }

◆ ConstructHorizontalCountHist()

void tesseract::PixelHistogram::ConstructHorizontalCountHist ( Pix *  pix)

Definition at line 487 of file devanagari_processing.cpp.

487 {
488 Clear();
489 Numa* counts = pixCountPixelsByRow(pix, nullptr);
490 length_ = numaGetCount(counts);
491 hist_ = new int[length_];
492 for (int i = 0; i < length_; ++i) {
493 l_int32 val = 0;
494 numaGetIValue(counts, i, &val);
495 hist_[i] = val;
496 }
497 numaDestroy(&counts);
498}

◆ ConstructVerticalCountHist()

void tesseract::PixelHistogram::ConstructVerticalCountHist ( Pix *  pix)

Definition at line 469 of file devanagari_processing.cpp.

469 {
470 Clear();
471 int width = pixGetWidth(pix);
472 int height = pixGetHeight(pix);
473 hist_ = new int[width];
474 length_ = width;
475 int wpl = pixGetWpl(pix);
476 l_uint32 *data = pixGetData(pix);
477 for (int i = 0; i < width; ++i)
478 hist_[i] = 0;
479 for (int i = 0; i < height; ++i) {
480 l_uint32 *line = data + i * wpl;
481 for (int j = 0; j < width; ++j)
482 if (GET_DATA_BIT(line, j))
483 ++(hist_[j]);
484 }
485}

◆ GetHistogramMaximum()

int tesseract::PixelHistogram::GetHistogramMaximum ( int *  count) const

Definition at line 455 of file devanagari_processing.cpp.

455 {
456 int best_value = 0;
457 for (int i = 0; i < length_; ++i) {
458 if (hist_[i] > hist_[best_value]) {
459 best_value = i;
460 }
461 }
462 if (count) {
463 *count = hist_[best_value];
464 }
465 return best_value;
466}
int count(LIST var_list)
Definition: oldlist.cpp:95

◆ hist()

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

Definition at line 52 of file devanagari_processing.h.

52{ return hist_; }

◆ length()

int tesseract::PixelHistogram::length ( ) const
inline

Definition at line 54 of file devanagari_processing.h.

54 {
55 return length_;
56 }

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