tesseract 4.1.1
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tesseract::IntFeatureSpace Class Reference

#include <intfeaturespace.h>

Public Member Functions

 IntFeatureSpace ()
 
void Init (uint8_t xbuckets, uint8_t ybuckets, uint8_t thetabuckets)
 
bool Serialize (FILE *fp) const
 
int Size () const
 
INT_FEATURE_STRUCT PositionFromIndex (int index) const
 
int Index (const INT_FEATURE_STRUCT &f) const
 
void IndexFeatures (const INT_FEATURE_STRUCT *features, int num_features, GenericVector< int > *mapped_features) const
 
void IndexAndSortFeatures (const INT_FEATURE_STRUCT *features, int num_features, GenericVector< int > *sorted_features) const
 
int XYToFeatureIndex (int x, int y) const
 

Protected Member Functions

int XBucket (int x) const
 
int YBucket (int y) const
 
int ThetaBucket (int theta) const
 
INT_FEATURE_STRUCT PositionFromBuckets (int x, int y, int theta) const
 

Protected Attributes

uint8_t x_buckets_
 
uint8_t y_buckets_
 
uint8_t theta_buckets_
 

Detailed Description

Definition at line 38 of file intfeaturespace.h.

Constructor & Destructor Documentation

◆ IntFeatureSpace()

tesseract::IntFeatureSpace::IntFeatureSpace ( )

Member Function Documentation

◆ Index()

int tesseract::IntFeatureSpace::Index ( const INT_FEATURE_STRUCT f) const
inline

Definition at line 60 of file intfeaturespace.h.

60 {
61 return (XBucket(f.X) * y_buckets_ + YBucket(f.Y)) * theta_buckets_ +
63 }
int ThetaBucket(int theta) const

◆ IndexAndSortFeatures()

void tesseract::IntFeatureSpace::IndexAndSortFeatures ( const INT_FEATURE_STRUCT features,
int  num_features,
GenericVector< int > *  sorted_features 
) const

Definition at line 68 of file intfeaturespace.cpp.

70 {
71 sorted_features->truncate(0);
72 for (int f = 0; f < num_features; ++f)
73 sorted_features->push_back(Index(features[f]));
74 sorted_features->sort();
75}
int push_back(T object)
void truncate(int size)
int Index(const INT_FEATURE_STRUCT &f) const

◆ IndexFeatures()

void tesseract::IntFeatureSpace::IndexFeatures ( const INT_FEATURE_STRUCT features,
int  num_features,
GenericVector< int > *  mapped_features 
) const

Definition at line 58 of file intfeaturespace.cpp.

60 {
61 mapped_features->truncate(0);
62 for (int f = 0; f < num_features; ++f)
63 mapped_features->push_back(Index(features[f]));
64}

◆ Init()

void tesseract::IntFeatureSpace::Init ( uint8_t  xbuckets,
uint8_t  ybuckets,
uint8_t  thetabuckets 
)

Definition at line 30 of file intfeaturespace.cpp.

30 {
31 x_buckets_ = xbuckets;
32 y_buckets_ = ybuckets;
33 theta_buckets_ = thetabuckets;
34}

◆ PositionFromBuckets()

INT_FEATURE_STRUCT tesseract::IntFeatureSpace::PositionFromBuckets ( int  x,
int  y,
int  theta 
) const
protected

Definition at line 114 of file intfeaturespace.cpp.

116 {
121 return pos;
122}
int DivRounded(int a, int b)
Definition: helpers.h:167
const int kIntFeatureExtent

◆ PositionFromIndex()

INT_FEATURE_STRUCT tesseract::IntFeatureSpace::PositionFromIndex ( int  index) const

Definition at line 50 of file intfeaturespace.cpp.

50 {
52 index / theta_buckets_ % y_buckets_,
53 index % theta_buckets_);
54}
INT_FEATURE_STRUCT PositionFromBuckets(int x, int y, int theta) const

◆ Serialize()

bool tesseract::IntFeatureSpace::Serialize ( FILE *  fp) const

Definition at line 38 of file intfeaturespace.cpp.

38 {
39 if (fwrite(&x_buckets_, sizeof(x_buckets_), 1, fp) != 1)
40 return false;
41 if (fwrite(&y_buckets_, sizeof(y_buckets_), 1, fp) != 1)
42 return false;
43 if (fwrite(&theta_buckets_, sizeof(theta_buckets_), 1, fp) != 1)
44 return false;
45 return true;
46}

◆ Size()

int tesseract::IntFeatureSpace::Size ( ) const
inline

Definition at line 51 of file intfeaturespace.h.

51 {
52 return static_cast<int>(x_buckets_) * y_buckets_ * theta_buckets_;
53 }

◆ ThetaBucket()

int tesseract::IntFeatureSpace::ThetaBucket ( int  theta) const
inlineprotected

Definition at line 89 of file intfeaturespace.h.

89 {
90 int bucket = DivRounded(theta * theta_buckets_, kIntFeatureExtent);
91 return Modulo(bucket, theta_buckets_);
92 }
int Modulo(int a, int b)
Definition: helpers.h:158

◆ XBucket()

int tesseract::IntFeatureSpace::XBucket ( int  x) const
inlineprotected

Definition at line 79 of file intfeaturespace.h.

79 {
80 int bucket = x * x_buckets_ / kIntFeatureExtent;
81 return ClipToRange(bucket, 0, static_cast<int>(x_buckets_) - 1);
82 }
T ClipToRange(const T &x, const T &lower_bound, const T &upper_bound)
Definition: helpers.h:108

◆ XYToFeatureIndex()

int tesseract::IntFeatureSpace::XYToFeatureIndex ( int  x,
int  y 
) const

Definition at line 79 of file intfeaturespace.cpp.

79 {
80 // Round the x,y position to a feature. Search for a valid theta.
81 INT_FEATURE_STRUCT feature(x, y, 0);
82 int index = -1;
83 for (int theta = 0; theta <= UINT8_MAX && index < 0; ++theta) {
84 feature.Theta = theta;
85 index = Index(feature);
86 }
87 if (index < 0) {
88 tprintf("(%d,%d) does not exist in feature space!\n", x, y);
89 return -1;
90 }
91 feature = PositionFromIndex(index);
92 tprintf("Click at (%d, %d) ->(%d, %d), ->(%d, %d)\n",
93 x, y, feature.X, feature.Y, x - feature.X, y - feature.Y);
94 // Get the relative position of x,y from the rounded feature.
95 x -= feature.X;
96 y -= feature.Y;
97 if (x != 0 || y != 0) {
98 double angle = atan2(static_cast<double>(y), static_cast<double>(x)) + M_PI;
99 angle *= kIntFeatureExtent / (2.0 * M_PI);
100 feature.Theta = static_cast<uint8_t>(angle + 0.5);
101 index = Index(feature);
102 if (index < 0) {
103 tprintf("Feature failed to map to a valid index:");
104 feature.print();
105 return -1;
106 }
107 feature = PositionFromIndex(index);
108 }
109 feature.print();
110 return index;
111}
DLLSYM void tprintf(const char *format,...)
Definition: tprintf.cpp:35
INT_FEATURE_STRUCT PositionFromIndex(int index) const

◆ YBucket()

int tesseract::IntFeatureSpace::YBucket ( int  y) const
inlineprotected

Definition at line 83 of file intfeaturespace.h.

83 {
84 int bucket = y * y_buckets_ / kIntFeatureExtent;
85 return ClipToRange(bucket, 0, static_cast<int>(y_buckets_) - 1);
86 }

Member Data Documentation

◆ theta_buckets_

uint8_t tesseract::IntFeatureSpace::theta_buckets_
protected

Definition at line 99 of file intfeaturespace.h.

◆ x_buckets_

uint8_t tesseract::IntFeatureSpace::x_buckets_
protected

Definition at line 97 of file intfeaturespace.h.

◆ y_buckets_

uint8_t tesseract::IntFeatureSpace::y_buckets_
protected

Definition at line 98 of file intfeaturespace.h.


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