IntegralImage.h
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00001 /*
00002  * This file is part of ALVAR, A Library for Virtual and Augmented Reality.
00003  *
00004  * Copyright 2007-2012 VTT Technical Research Centre of Finland
00005  *
00006  * Contact: VTT Augmented Reality Team <alvar.info@vtt.fi>
00007  *          <http://www.vtt.fi/multimedia/alvar.html>
00008  *
00009  * ALVAR is free software; you can redistribute it and/or modify it under the
00010  * terms of the GNU Lesser General Public License as published by the Free
00011  * Software Foundation; either version 2.1 of the License, or (at your option)
00012  * any later version.
00013  *
00014  * This library is distributed in the hope that it will be useful, but WITHOUT
00015  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00016  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
00017  * for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public License
00020  * along with ALVAR; if not, see
00021  * <http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html>.
00022  */
00023 
00024 #ifndef INTEGRAL_IMAGE_H
00025 #define INTEGRAL_IMAGE_H
00026 
00034 #include "Alvar.h"
00035 #include <cxcore.h>
00036 #include <cv.h>
00037 
00038 namespace alvar {
00039 
00055 class ALVAR_EXPORT IntIndex {
00056 protected:
00057     int index;
00058     int step;
00059     int step_remainder;
00060     int estep;
00061     int next_step;
00062     int res;
00063     int steps;
00064     void update_next_step();
00065 public:
00070     IntIndex(int _res, int _steps);
00073     int operator=(int v);
00075     int next();
00077     int get() const;
00079     int get_next_step() const;
00081     int end() const;
00082 };
00083 
00084 
00100 class ALVAR_EXPORT IntegralImage {
00101         IplImage *sum;
00102 public:
00103         IntegralImage();
00104         ~IntegralImage();
00108         void Update(IplImage *gray);
00113     double GetSum(CvRect &rect, int *count=0);
00115         double GetAve(CvRect &rect);
00124     void GetSubimage(const CvRect &rect, IplImage *sub);
00125 };
00126 
00136 class ALVAR_EXPORT IntegralGradient {
00137 protected:
00138         IplImage *normalx;
00139         IplImage *normaly;
00140         IntegralImage integx;
00141         IntegralImage integy;
00142         // Calculate point normals for 4-pixel intersection
00143         // as described in Donahue1992
00144         void CalculatePointNormals(IplImage *gray);
00145 public:
00146         IntegralGradient();
00147         ~IntegralGradient();
00151         void Update(IplImage *gray);
00157         void GetGradient(CvRect &rect, double *dirx, double *diry, int *count=0);
00162         void GetAveGradient(CvRect &rect, double *dirx, double *diry);
00163 };
00164 
00165 } // namespace alvar
00166 
00167 #endif


ar_track_alvar
Author(s): Scott Niekum
autogenerated on Sun Oct 5 2014 22:16:26