#ifdef?_CH_
#pragma?package?
#endif

#ifndef?_EiC
#include?

#include?“stdlib.h“
#include?“string.h“?
#include?“malloc.h“?
#include?“math.h“?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#endif

#ifdef?_EiC
#define?WIN32
#endif

#define?NUMSIZE?2
#define?GAUSSKERN?3.5
#define?PI?3.14159265358979323846
/**
???Sigma?of?base?image?--?See?D.L.‘s?paper.
*/
#define?INITSIGMA?0.5
/**
???Sigma?of?each?octave?--?See?D.L.‘s?paper.
*/
#define?SIGMA?sqrt（3）//1.6//
/**
???Number?of?scales?per?octave.??See?D.L.‘s?paper.
*/
#define?SCALESPEROCTAVE?2
#define?MAXOCTAVES?4
int?????numoctaves;
/**
???Double?image?size?before?looking?searching?for?keypoints
???Doubling?finds?more?keypoints?but?takes?longer.?See
???D.L.‘s?paper.
*/
#define?CONTRAST_THRESHOLD???0.02
#define?CURVATURE_THRESHOLD??10.0
#define?DOUBLE_base_IMAGE_SIZE?1
#define?peakRelThresh?0.8
#define?LEN?128

CvMemStorage*?storage?=?0;?//?temporary?storage
//Gaussian金字塔感覺用二維指針較簡單
/*?Data?structure?for?a?float?image.
*/
typedef?struct?ImageSt?{????????/*金字塔每一層*/
??
??float?levelsigma;
??int?levelsigmalength;
??float?absolute_sigma;
??CvMat?*Level;??????????????
}?ImageLevels;
typedef?struct?ImageSt1?{??????/*金字塔每一階梯*/
??int?row?col;??????????/*?Dimensions?of?image.?*/
??float?subsample;
??ImageLevels?*Octave;??????????????
}?ImageOctaves;

ImageOctaves?*DOGoctaves;????????//DOG?pyr
ImageOctaves?*mag_thresh?;
ImageOctaves?*mag_pyr?;
ImageOctaves?*grad_pyr?;
/*?Data?structure?for?a?keypoint.??Lists?of?keypoints?are?linked
???by?the?“next“?field.*/
typedef?struct?KeypointSt?
{
??float?row?col;?/*?反饋回原圖像大小，特征點的位置?*/
??float?sxsy;????/*?金字塔中特征點的位置*/
??int?octavelevel;/*金字塔中，特征點所在的階梯、層次*/

??float?scale?orimag;?/*所在層的尺度sigma主方向orientation?（range?[-PIPI]），以及幅值*/
??float?*descrip;???????/*特征描述字指針：128維或32維等*/
??struct?KeypointSt?*next;/*?Pointer?to?next?keypoint?in?list.?*/
}?*Keypoint;
//定義特征點具體變量
Keypoint?keypoints=NULL;??????//用于臨時存儲特征點的位置等
Keypoint?keyDescriptors=NULL;?//用于最后的確定特征點以及特征描述字
//圖像處理基本函數，其實其實可以用OPENCV的函數代替
//void?NormalizeImage（CvMat?*src）;
CvMat?*?halfSizeImage（CvMat?*?im）;?????//縮小圖像：下采樣
CvMat?*?doubleSizeImage（CvMat?*?im）;???//擴大圖像：最近臨方法
CvMat?*?doubleSizeImage2（CvMat?*?im）;??//擴大圖像：線性插值
float?getPixelBI（CvMat?*?im?float?col?float?row）;//雙線性插值函數
void?normalizeVec（float*?vec?int?dim）;//向量歸一化??
CvMat*?GaussianKernel2D（float?sigma）;??//得到2維高斯核
void?normalizeMat（CvMat*?mat）?;????????//矩陣歸一化
float*?GaussianKernel1D（float?sigma?int?dim）?;?//得到1維高斯核
float?ConvolveLocWidth（float*?kernel?int?dim?CvMat?*?src?int?x?int?y）?;??//在具體像素處寬度方向進行高斯卷積
void?Convolve1DWidth（float*?kern?int?dim?CvMat?*?src?CvMat?*?dst）?;???????//在整個圖像寬度方向進行1D高斯卷積
float?ConvolveLocHeight（float*?kernel?int?dim?CvMat?*?src?int?x?int?y）?;?//在具體像素處高度方向進行高斯卷積
void?Convolve1DHeight（float*?kern?int?dim?CvMat?*?src

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????72310??2005-07-07?12:54??SIFT\data\box.pgm

?????文件?????233055??2006-08-24?13:02??SIFT\data\box.sift

?????文件??????10060??2006-10-25?09:15??SIFT\data\circle.pgm

?????文件???????1362??2006-10-25?09:42??SIFT\data\circle.sift

?????文件?????464954??2006-04-04?21:45??SIFT\data\img3.jpg

?????文件?????467808??2006-04-04?21:45??SIFT\data\img5.jpg

?????文件?????275111??2006-05-01?12:51??SIFT\data\landscape-a.jpg

?????文件?????304723??2006-05-01?12:52??SIFT\data\landscape-b.jpg

?????文件??????11101??2006-11-02?13:33??SIFT\data\nest.png

?????文件??????17462??2006-11-02?14:27??SIFT\data\nest2.bmp

?????文件???????3377??2008-06-28?19:14??SIFT\SIFT.dsp

?????文件?????205824??2008-06-28?22:26??SIFT\Debug\vc60.idb

?????文件?????135168??2008-06-28?19:22??SIFT\Debug\vc60.pdb

?????文件????5095848??2008-06-28?19:14??SIFT\Debug\SIFT.pch

?????文件?????500736??2008-06-28?19:22??SIFT\Debug\SIFT.pdb

?????文件?????256280??2008-06-28?19:22??SIFT\Debug\SIFT.ilk

?????文件?????225326??2008-06-28?19:22??SIFT\Debug\SIFT.exe

?????文件??????80298??2008-06-28?19:22??SIFT\Debug\SIFT.obj

?????文件???????3098??2008-06-28?19:22??SIFT\SIFT.plg

?????文件?????464954??2006-04-04?21:45??SIFT\img3.jpg

?????文件?????275111??2006-05-01?12:51??SIFT\landscape_a.jpg

?????文件??????52579??2008-06-28?19:22??SIFT\SIFT.cpp

?????目錄??????????0??2006-12-12?15:14??SIFT\data

?????目錄??????????0??2008-06-28?19:14??SIFT\Debug

?????目錄??????????0??2006-12-12?15:21??SIFT

-----------?---------??----------?-----??----

??????????????9156545????????????????????25