GDAL
gdal_simplesurf.h
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28 
35 #ifndef GDALSIMPLESURF_H_
36 #define GDALSIMPLESURF_H_
37 
38 #include "gdal_priv.h"
39 #include "cpl_conv.h"
40 #include <list>
41 
51 {
52 public:
58 
64 
77  GDALFeaturePoint(int nX, int nY, int nScale, int nRadius, int nSign);
78  virtual ~GDALFeaturePoint();
79 
82 
92  double& operator[](int nIndex);
93 
95  static const int DESC_SIZE = 64;
96 
102  int GetX() const;
103 
109  void SetX(int nX);
110 
116  int GetY() const;
117 
123  void SetY(int nY);
124 
130  int GetScale() const ;
131 
137  void SetScale(int nScale);
138 
144  int GetRadius() const;
145 
151  void SetRadius(int nRadius);
152 
158  int GetSign() const;
159 
165  void SetSign(int nSign);
166 
167 private:
168  // Coordinates of point in image
169  int nX;
170  int nY;
171  // --------------------
172  int nScale;
173  int nRadius;
174  int nSign;
175  // Descriptor array
176  double *padfDescriptor;
177 };
178 
189 {
191 
192 public:
194  virtual ~GDALIntegralImage();
195 
203  void Initialize(const double **padfImg, int nHeight, int nWidth);
204 
213  double GetValue(int nRow, int nCol);
214 
226  double GetRectangleSum(int nRow, int nCol, int nWidth, int nHeight);
227 
237  double HaarWavelet_X(int nRow, int nCol, int nSize);
238 
248  double HaarWavelet_Y(int nRow, int nCol, int nSize);
249 
255  int GetHeight();
256 
262  int GetWidth();
263 
264 private:
265  double **pMatrix = nullptr;
266  int nWidth = 0;
267  int nHeight = 0;
268 };
269 
279 {
281 
282 public:
283  GDALOctaveLayer();
284 
293  GDALOctaveLayer(int nOctave, int nInterval);
294  virtual ~GDALOctaveLayer();
295 
305  void ComputeLayer(GDALIntegralImage *poImg);
306 
318  int radius;
322  int scale;
326  int width;
330  int height;
334  double **detHessians;
338  int **signs;
339 };
340 
348 {
350 
351 public:
358  GDALOctaveMap(int nOctaveStart, int nOctaveEnd);
359  virtual ~GDALOctaveMap();
360 
367  void ComputeMap(GDALIntegralImage *poImg);
368 
386  static bool PointIsExtremum(int row, int col, GDALOctaveLayer *bot,
387  GDALOctaveLayer *mid, GDALOctaveLayer *top, double threshold);
388 
393 
397  static const int INTERVALS = 4;
398 
403 
408 };
409 
422 {
423 private:
428  class MatchedPointPairInfo
429  {
430  public:
431  MatchedPointPairInfo(int nInd_1, int nInd_2, double dfDist):
432  ind_1(nInd_1), ind_2(nInd_2), euclideanDist(dfDist) {}
433 
434  int ind_1;
435  int ind_2;
436  double euclideanDist;
437  };
438 
440 
441 public:
463  GDALSimpleSURF(int nOctaveStart, int nOctaveEnd);
464  virtual ~GDALSimpleSURF();
465 
483  GDALRasterBand *red,
484  GDALRasterBand *green,
485  GDALRasterBand *blue,
486  int nXSize, int nYSize,
487  double **padfImg, int nHeight, int nWidth);
488 
503  std::vector<GDALFeaturePoint>*
504  ExtractFeaturePoints(GDALIntegralImage *poImg, double dfThreshold);
505 
518  static CPLErr MatchFeaturePoints(
519  std::vector<GDALFeaturePoint*> *poMatchPairs,
520  std::vector<GDALFeaturePoint> *poFirstCollect,
521  std::vector<GDALFeaturePoint> *poSecondCollect,
522  double dfThreshold);
523 
524 private:
534  static double GetEuclideanDistance(
535  GDALFeaturePoint &firstPoint, GDALFeaturePoint &secondPoint);
536 
542  static void NormalizeDistances(std::list<MatchedPointPairInfo> *poList);
543 
550  static void SetDescriptor(GDALFeaturePoint *poPoint, GDALIntegralImage *poImg);
551 
552 private:
553  int octaveStart;
554  int octaveEnd;
555  GDALOctaveMap *poOctMap;
556 };
557 
558 #endif /* GDALSIMPLESURF_H_ */
std::vector< GDALFeaturePoint > * ExtractFeaturePoints(GDALIntegralImage *poImg, double dfThreshold)
Find feature points using specified integral image.
Definition: gdal_simplesurf.cpp:213
GDALFeaturePoint & operator=(const GDALFeaturePoint &point)
Assignment operator.
Definition: gdal_simplesurf.cpp:71
int octaveNum
Octave which contains this layer (1,2,3...)
Definition: gdal_simplesurf.h:310
int height
Image height in pixels.
Definition: gdal_simplesurf.h:330
int GetHeight()
Fetch height of integral image.
Definition: gdal_octave.cpp:40
C++ GDAL entry points.
Class for handling octave layers in SURF-based algorithm.
Definition: gdal_simplesurf.h:347
int scale
Scale for this layer.
Definition: gdal_simplesurf.h:322
GDALOctaveMap(int nOctaveStart, int nOctaveEnd)
Create octave space.
Definition: gdal_octave.cpp:244
void SetSign(int nSign)
Set sign of point.
Definition: gdal_simplesurf.cpp:106
Class for searching corresponding points on images.
Definition: gdal_simplesurf.h:421
void SetScale(int nScale)
Set scale of point.
Definition: gdal_simplesurf.cpp:100
double HaarWavelet_X(int nRow, int nCol, int nSize)
Get value of horizontal Haar wavelet in specified square grid.
Definition: gdal_octave.cpp:133
Class of "feature point" in raster.
Definition: gdal_simplesurf.h:50
double ** detHessians
Hessian values for image pixels.
Definition: gdal_simplesurf.h:334
int GetX() const
Fetch X-coordinate (pixel) of point.
Definition: gdal_simplesurf.cpp:93
GDALOctaveLayer *** pMap
2-dimensional array of octave layers
Definition: gdal_simplesurf.h:392
void Initialize(const double **padfImg, int nHeight, int nWidth)
Compute integral image for specified array.
Definition: gdal_octave.cpp:44
GDALFeaturePoint()
Standard constructor.
Definition: gdal_simplesurf.cpp:40
double HaarWavelet_Y(int nRow, int nCol, int nSize)
Get value of vertical Haar wavelet in specified square grid.
Definition: gdal_octave.cpp:139
double GetRectangleSum(int nRow, int nCol, int nWidth, int nHeight)
Get sum of values in specified rectangular grid.
Definition: gdal_octave.cpp:94
int radius
Length of the border.
Definition: gdal_simplesurf.h:318
int GetScale() const
Fetch scale of point.
Definition: gdal_simplesurf.cpp:99
int GetSign() const
Fetch sign of Hessian determinant of point.
Definition: gdal_simplesurf.cpp:105
void ComputeMap(GDALIntegralImage *poImg)
Calculate Hessian values for octave space (for all stored octave layers) using specified integral ima...
Definition: gdal_octave.cpp:257
void SetY(int nY)
Set Y coordinate of point.
Definition: gdal_simplesurf.cpp:97
static CPLErr ConvertRGBToLuminosity(GDALRasterBand *red, GDALRasterBand *green, GDALRasterBand *blue, int nXSize, int nYSize, double **padfImg, int nHeight, int nWidth)
Convert image with RGB channels to grayscale using "luminosity" method.
Definition: gdal_simplesurf.cpp:137
Integral image class (summed area table).
Definition: gdal_simplesurf.h:188
int GetY() const
Fetch Y-coordinate (line) of point.
Definition: gdal_simplesurf.cpp:96
int GetWidth()
Fetch width of integral image.
Definition: gdal_octave.cpp:42
double & operator[](int nIndex)
Provide access to point's descriptor.
Definition: gdal_simplesurf.cpp:108
int ** signs
Hessian signs for speeded matching.
Definition: gdal_simplesurf.h:338
int width
Image width in pixels.
Definition: gdal_simplesurf.h:326
void ComputeLayer(GDALIntegralImage *poImg)
Perform calculation of Hessian determinants and their signs for specified integral image...
Definition: gdal_octave.cpp:171
double GetValue(int nRow, int nCol)
Fetch value of specified position in integral image.
Definition: gdal_octave.cpp:86
Various convenience functions for CPL.
int octaveEnd
Number of top octave.
Definition: gdal_simplesurf.h:407
int filterSize
Length of the side of filter.
Definition: gdal_simplesurf.h:314
int GetRadius() const
Fetch radius of point.
Definition: gdal_simplesurf.cpp:102
A single raster band (or channel).
Definition: gdal_priv.h:1032
static const int DESC_SIZE
Descriptor length.
Definition: gdal_simplesurf.h:95
void SetRadius(int nRadius)
Set radius of point.
Definition: gdal_simplesurf.cpp:103
int octaveStart
Number of bottom octave.
Definition: gdal_simplesurf.h:402
Class for computation and storage of Hessian values in SURF-based algorithm.
Definition: gdal_simplesurf.h:278
static const int INTERVALS
Value for constructing internal octave space.
Definition: gdal_simplesurf.h:397
static CPLErr MatchFeaturePoints(std::vector< GDALFeaturePoint * > *poMatchPairs, std::vector< GDALFeaturePoint > *poFirstCollect, std::vector< GDALFeaturePoint > *poSecondCollect, double dfThreshold)
Find corresponding points (equal points in two collections).
Definition: gdal_simplesurf.cpp:365
void SetX(int nX)
Set X coordinate of point.
Definition: gdal_simplesurf.cpp:94
CPLErr
Error category.
Definition: cpl_error.h:52
GDALSimpleSURF(int nOctaveStart, int nOctaveEnd)
Prepare class according to specified parameters.
Definition: gdal_simplesurf.cpp:129
#define CPL_DISALLOW_COPY_ASSIGN(ClassName)
Helper to remove the copy and assignment constructors so that the compiler will not generate the defa...
Definition: cpl_port.h:987
static bool PointIsExtremum(int row, int col, GDALOctaveLayer *bot, GDALOctaveLayer *mid, GDALOctaveLayer *top, double threshold)
Method makes decision that specified point in middle octave layer is maximum among all points from 3x...
Definition: gdal_octave.cpp:264

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