Tesseract  3.02
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tesseract::IntFeatureSpace Class Reference

#include <intfeaturespace.h>

List of all members.

Public Member Functions

 IntFeatureSpace ()
void Init (uinT8 xbuckets, uinT8 ybuckets, uinT8 thetabuckets)
bool Serialize (FILE *fp) const
bool DeSerialize (bool swap, FILE *fp)
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 x_buckets_
uinT8 y_buckets_
uinT8 theta_buckets_

Detailed Description

Definition at line 38 of file intfeaturespace.h.


Constructor & Destructor Documentation

tesseract::IntFeatureSpace::IntFeatureSpace ( )

Definition at line 25 of file intfeaturespace.cpp.


Member Function Documentation

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

Definition at line 50 of file intfeaturespace.cpp.

{
if (fread(&x_buckets_, sizeof(x_buckets_), 1, fp) != 1)
return false;
if (fread(&y_buckets_, sizeof(y_buckets_), 1, fp) != 1)
return false;
if (fread(&theta_buckets_, sizeof(theta_buckets_), 1, fp) != 1)
return false;
return true;
}
int tesseract::IntFeatureSpace::Index ( const INT_FEATURE_STRUCT f) const
inline

Definition at line 65 of file intfeaturespace.h.

{
return (XBucket(f.X) * y_buckets_ + YBucket(f.Y)) * theta_buckets_ +
}
void tesseract::IntFeatureSpace::IndexAndSortFeatures ( const INT_FEATURE_STRUCT features,
int  num_features,
GenericVector< int > *  sorted_features 
) const

Definition at line 80 of file intfeaturespace.cpp.

{
sorted_features->truncate(0);
for (int f = 0; f < num_features; ++f)
sorted_features->push_back(Index(features[f]));
sorted_features->sort();
}
void tesseract::IntFeatureSpace::IndexFeatures ( const INT_FEATURE_STRUCT features,
int  num_features,
GenericVector< int > *  mapped_features 
) const

Definition at line 70 of file intfeaturespace.cpp.

{
mapped_features->truncate(0);
for (int f = 0; f < num_features; ++f)
mapped_features->push_back(Index(features[f]));
}
void tesseract::IntFeatureSpace::Init ( uinT8  xbuckets,
uinT8  ybuckets,
uinT8  thetabuckets 
)

Definition at line 29 of file intfeaturespace.cpp.

{
x_buckets_ = xbuckets;
y_buckets_ = ybuckets;
theta_buckets_ = thetabuckets;
}
INT_FEATURE_STRUCT tesseract::IntFeatureSpace::PositionFromBuckets ( int  x,
int  y,
int  theta 
) const
protected

Definition at line 127 of file intfeaturespace.cpp.

{
static_cast<uinT8>(ClipToRange(
0, MAX_UINT8)),
static_cast<uinT8>(ClipToRange(
0, MAX_UINT8)),
static_cast<uinT8>(ClipToRange(
0, MAX_UINT8))};
return pos;
}
INT_FEATURE_STRUCT tesseract::IntFeatureSpace::PositionFromIndex ( int  index) const

Definition at line 62 of file intfeaturespace.cpp.

{
index / theta_buckets_ % y_buckets_,
index % theta_buckets_);
}
bool tesseract::IntFeatureSpace::Serialize ( FILE *  fp) const

Definition at line 37 of file intfeaturespace.cpp.

{
if (fwrite(&x_buckets_, sizeof(x_buckets_), 1, fp) != 1)
return false;
if (fwrite(&y_buckets_, sizeof(y_buckets_), 1, fp) != 1)
return false;
if (fwrite(&theta_buckets_, sizeof(theta_buckets_), 1, fp) != 1)
return false;
return true;
}
int tesseract::IntFeatureSpace::Size ( ) const
inline

Definition at line 56 of file intfeaturespace.h.

{
return static_cast<int>(x_buckets_) * y_buckets_ * theta_buckets_;
}
int tesseract::IntFeatureSpace::ThetaBucket ( int  theta) const
inlineprotected

Definition at line 94 of file intfeaturespace.h.

{
return Modulo(bucket, theta_buckets_);
}
int tesseract::IntFeatureSpace::XBucket ( int  x) const
inlineprotected

Definition at line 84 of file intfeaturespace.h.

{
int bucket = x * x_buckets_ / kIntFeatureExtent;
return ClipToRange(bucket, 0, static_cast<int>(x_buckets_) - 1);
}
int tesseract::IntFeatureSpace::XYToFeatureIndex ( int  x,
int  y 
) const

Definition at line 91 of file intfeaturespace.cpp.

{
// Round the x,y position to a feature. Search for a valid theta.
INT_FEATURE_STRUCT feature = {static_cast<uinT8>(x), static_cast<uinT8>(y),
0, 0};
int index = -1;
for (int theta = 0; theta <= MAX_UINT8 && index < 0; ++theta) {
feature.Theta = theta;
index = Index(feature);
}
if (index < 0) {
tprintf("(%d,%d) does not exist in feature space!\n", x, y);
return -1;
}
feature = PositionFromIndex(index);
tprintf("Click at (%d, %d) ->(%d, %d), ->(%d, %d)\n",
x, y, feature.X, feature.Y, x - feature.X, y - feature.Y);
// Get the relative position of x,y from the rounded feature.
x -= feature.X;
y -= feature.Y;
if (x != 0 || y != 0) {
double angle = atan2(static_cast<double>(y), static_cast<double>(x)) + PI;
angle *= kIntFeatureExtent / (2.0 * PI);
feature.Theta = static_cast<uinT8>(angle + 0.5);
index = Index(feature);
if (index < 0) {
tprintf("Feature failed to map to a valid index:");
feature.print();
return -1;
}
feature = PositionFromIndex(index);
}
feature.print();
return index;
}
int tesseract::IntFeatureSpace::YBucket ( int  y) const
inlineprotected

Definition at line 88 of file intfeaturespace.h.

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

Member Data Documentation

uinT8 tesseract::IntFeatureSpace::theta_buckets_
protected

Definition at line 104 of file intfeaturespace.h.

uinT8 tesseract::IntFeatureSpace::x_buckets_
protected

Definition at line 102 of file intfeaturespace.h.

uinT8 tesseract::IntFeatureSpace::y_buckets_
protected

Definition at line 103 of file intfeaturespace.h.


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