CVD 0.8
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00001 /* 00002 This file is part of the CVD Library. 00003 00004 Copyright (C) 2005 The Authors 00005 00006 This library is free software; you can redistribute it and/or 00007 modify it under the terms of the GNU Lesser General Public 00008 License as published by the Free Software Foundation; either 00009 version 2.1 of the License, or (at your option) any later version. 00010 00011 This library is distributed in the hope that it will be useful, 00012 but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 Lesser General Public License for more details. 00015 00016 You should have received a copy of the GNU Lesser General Public 00017 License along with this library; if not, write to the Free Software 00018 Foundation, Inc., 00019 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef CVD_INC_INTEGRAL_IMAGE_H 00023 #define CVD_INC_INTEGRAL_IMAGE_H 00024 00025 #include <cvd/image.h> 00026 #include <cvd/vision.h> 00027 #include <cvd/internal/pixel_operations.h> 00028 00029 namespace CVD 00030 { 00039 00040 template<class S, class D> void integral_image(const SubImage<S>& in, SubImage<D>& out) 00041 { 00042 if( in.size() != out.size()) 00043 throw Exceptions::Vision::IncompatibleImageSizes("integral_image"); 00044 00045 Pixel::operations<D>::assign(out[0][0], in[0][0]); 00046 //Do the first row. 00047 for(int x=1; x < in.size().x; x++) 00048 out[0][x] =out[0][x-1] + in[0][x]; 00049 00050 //Do the first column. 00051 for(int y=1; y < in.size().y; y++) 00052 out[y][0] =out[y-1][0] + in[y][0]; 00053 00054 //Do the remainder of the image 00055 for(int y=1; y < in.size().y; y++) 00056 { 00057 D sum; 00058 Pixel::operations<D>::assign(sum,in[y][0]); 00059 00060 for(int x=1; x < in.size().x; x++) 00061 { 00062 sum+= in[y][x]; 00063 Pixel::operations<D>::assign(out[y][x],sum + out[y-1][x]); 00064 } 00065 } 00066 } 00067 #ifndef DOXYGEN_IGNORE_INTERNAL 00068 namespace Internal 00069 { 00070 template<class C> class IntegralImage{}; 00071 00072 template<class C> struct ImagePromise<IntegralImage<C> > 00073 { 00074 ImagePromise(const SubImage<C>& im) 00075 :i(im) 00076 {} 00077 00078 const SubImage<C>& i; 00079 template<class D> void execute(Image<D>& j) 00080 { 00081 j.resize(i.size()); 00082 integral_image<C,D>(i, j); 00083 } 00084 }; 00085 }; 00086 00087 template<class C> Internal::ImagePromise<Internal::IntegralImage<C> > integral_image(const SubImage<C>& c) 00088 { 00089 return Internal::ImagePromise<Internal::IntegralImage<C> >(c); 00090 } 00091 #else 00092 00093 00094 00095 00096 00097 00098 00099 00100 00101 00102 00103 00104 00105 00106 00107 00108 00109 template<class S, class D> Image<D> integral_image(const BasicImage<S>& from); 00110 00111 #endif 00112 00113 } 00114 00115 00116 #endif 00117