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| vigra/combineimages.hxx |
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    00001 /************************************************************************/
    00002 /*                                                                      */
    00003 /*               Copyright 1998-2002 by Ullrich Koethe                  */
    00004 /*       Cognitive Systems Group, University of Hamburg, Germany        */
    00005 /*                                                                      */
    00006 /*    This file is part of the VIGRA computer vision library.           */
    00007 /*    ( Version 1.4.0, Dec 21 2005 )                                    */
    00008 /*    The VIGRA Website is                                              */
    00009 /*        http://kogs-www.informatik.uni-hamburg.de/~koethe/vigra/      */
    00010 /*    Please direct questions, bug reports, and contributions to        */
    00011 /*        koethe@informatik.uni-hamburg.de          or                  */
    00012 /*        vigra@kogs1.informatik.uni-hamburg.de                         */
    00013 /*                                                                      */
    00014 /*    Permission is hereby granted, free of charge, to any person       */
    00015 /*    obtaining a copy of this software and associated documentation    */
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    00020 /*    Software is furnished to do so, subject to the following          */
    00021 /*    conditions:                                                       */
    00022 /*                                                                      */
    00023 /*    The above copyright notice and this permission notice shall be    */
    00024 /*    included in all copies or substantial portions of the             */
    00025 /*    Software.                                                         */
    00026 /*                                                                      */
    00027 /*    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND    */
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    00029 /*    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND          */
    00030 /*    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT       */
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    00035 /*                                                                      */
    00036 /************************************************************************/
    00037
    00038
    00039 #ifndef VIGRA_COMBINEIMAGES_HXX
    00040 #define VIGRA_COMBINEIMAGES_HXX
    00041
    00042 #include "vigra/utilities.hxx"
    00043 #include "vigra/numerictraits.hxx"
    00044 #include "vigra/functortraits.hxx"
    00045 #include <cmath>
    00046
    00047 namespace vigra {
    00048
    00049 /** \addtogroup CombineAlgo Algorithms to Combine Images
    00050
    00051     Apply functor to calculate a pixelwise transformation depending on multiple images.
    00052     Note that the binary functors of the STL may be used with these functions.
    00053 */
    00054 //@{
    00055
    00056 /********************************************************/
    00057 /*                                                      */
    00058 /*                    combine...Lines                   */
    00059 /*                                                      */
    00060 /********************************************************/
    00061
    00062 template <class SrcIterator1, class SrcAccessor1,
    00063           class SrcIterator2, class SrcAccessor2,
    00064           class DestIterator, class DestAccessor, class Functor>
    00065 void
    00066 combineTwoLines(SrcIterator1 s1,
    00067                 SrcIterator1 s1end, SrcAccessor1 src1,
    00068                 SrcIterator2 s2, SrcAccessor2 src2,
    00069                 DestIterator d, DestAccessor dest,
    00070                 Functor const & f)
    00071 {
    00072     for(; s1 != s1end; ++s1, ++s2, ++d)
    00073         dest.set(f(src1(s1), src2(s2)), d);
    00074 }
    00075
    00076 template <class SrcIterator1, class SrcAccessor1,
    00077           class SrcIterator2, class SrcAccessor2,
    00078           class MaskIterator, class MaskAccessor,
    00079           class DestIterator, class DestAccessor, class Functor>
    00080 void
    00081 combineTwoLinesIf(SrcIterator1 s1,
    00082                   SrcIterator1 s1end, SrcAccessor1 src1,
    00083                   SrcIterator2 s2, SrcAccessor2 src2,
    00084                   MaskIterator m, MaskAccessor mask,
    00085                   DestIterator d, DestAccessor dest,
    00086                   Functor const & f)
    00087 {
    00088     for(; s1 != s1end; ++s1, ++s2, ++m, ++d)
    00089         if(mask(m))
    00090             dest.set(f(src1(s1), src2(s2)), d);
    00091 }
    00092
    00093 template <class SrcIterator1, class SrcAccessor1,
    00094           class SrcIterator2, class SrcAccessor2,
    00095           class SrcIterator3, class SrcAccessor3,
    00096           class DestIterator, class DestAccessor, class Functor>
    00097 void
    00098 combineThreeLines(SrcIterator1 s1,
    00099                   SrcIterator1 s1end, SrcAccessor1 src1,
    00100                   SrcIterator2 s2, SrcAccessor2 src2,
    00101                   SrcIterator3 s3, SrcAccessor3 src3,
    00102                   DestIterator d, DestAccessor dest,
    00103                   Functor const & f)
    00104 {
    00105     for(; s1 != s1end; ++s1, ++s2, ++s3, ++d)
    00106         dest.set(f(src1(s1), src2(s2), src3(s3)), d);
    00107 }
    00108
    00109 /********************************************************/
    00110 /*                                                      */
    00111 /*                    combineTwoImages                  */
    00112 /*                                                      */
    00113 /********************************************************/
    00114
    00115 /** \brief Combine two source images into destination image.
    00116
    00117     The transformation given by the functor is applied to the source
    00118     pixels and the result written into the corresponding destination pixel.
    00119     This is typically used for operations like add and subtract.
    00120     The function uses accessors to access the pixel data.
    00121     Note that the binary functors of the STL can be used in addition to
    00122     the functors specifically defined in \ref CombineFunctor.
    00123     Creation of new functors is easiest by using \ref FunctorExpressions.
    00124
    00125     <b> Declarations:</b>
    00126
    00127     pass arguments explicitly:
    00128     \code
    00129     namespace vigra {
    00130         template <class SrcImageIterator1, class SrcAccessor1,
    00131               class SrcImageIterator2, class SrcAccessor2,
    00132               class DestImageIterator, class DestAccessor,
    00133               class Functor>
    00134         void
    00135         combineTwoImages(SrcImageIterator1 src1_upperleft,
    00136                  SrcImageIterator1 src1_lowerright, SrcAccessor1 sa1,
    00137                  SrcImageIterator2 src2_upperleft, SrcAccessor2 sa2,
    00138                  DestImageIterator dest_upperleft, DestAccessor da,
    00139                  Functor const & f)
    00140     }
    00141     \endcode
    00142
    00143
    00144     use argument objects in conjunction with \ref ArgumentObjectFactories:
    00145     \code
    00146     namespace vigra {
    00147         template <class SrcImageIterator1, class SrcAccessor1,
    00148               class SrcImageIterator2, class SrcAccessor2,
    00149               class DestImageIterator, class DestAccessor,
    00150               class Functor>
    00151         void
    00152         combineTwoImages(triple<SrcImageIterator1, SrcImageIterator1, SrcAccessor1> src1,
    00153                  pair<SrcImageIterator2, SrcAccessor2> src2,
    00154                  pair<DestImageIterator, DestAccessor> dest,
    00155                  Functor const & f)
    00156     }
    00157     \endcode
    00158
    00159     <b> Usage:</b>
    00160
    00161         <b>\#include</b> "<a href="combineimages_8hxx-source.html">vigra/combineimages.hxx</a>"<br>
    00162         Namespace: vigra
    00163
    00164     \code
    00165     #include <functional>     // for plus
    00166
    00167     vigra::combineTwoImages(
    00168                 srcIterRange(src1.upperLeft(), src1.lowerRight()),
    00169                 srcIter(src2.upperLeft()),
    00170                 destIter(dest.upperLeft()),
    00171                 std::plus<SrcValueType>());
    00172
    00173     \endcode
    00174
    00175     Note that <TT>SrcValueType</TT> must be replaced with the appropriate type (e.g.
    00176     the promote type of the input images' pixel type, see also
    00177     \ref NumericPromotionTraits)
    00178
    00179     <b> Required Interface:</b>
    00180
    00181     \code
    00182     SrcImageIterator1 src1_upperleft, src1_lowerright;
    00183     SrcImageIterator2 src2_upperleft;
    00184     DestImageIterator dest_upperleft;
    00185     SrcImageIterator1::row_iterator sx1 = src1_upperleft.rowIterator();
    00186     SrcImageIterator2::row_iterator sx2 = src2_upperleft.rowIterator();
    00187     DestImageIterator::row_iterator dx = dest_upperleft.rowIterator();
    00188
    00189     SrcAccessor1 src1_accessor;
    00190     SrcAccessor2 src2_accessor;
    00191     DestAccessor dest_accessor;
    00192
    00193     Functor functor;
    00194
    00195     dest_accessor.set(
    00196           functor(src1_accessor(sx1), src2_accessor(sx2)),
    00197           dx);
    00198
    00199     \endcode
    00200
    00201
    00202 */
    00203 template <class SrcImageIterator1, class SrcAccessor1,
    00204           class SrcImageIterator2, class SrcAccessor2,
    00205           class DestImageIterator, class DestAccessor,
    00206           class Functor>
    00207 void
    00208 combineTwoImages(SrcImageIterator1 src1_upperleft,
    00209                  SrcImageIterator1 src1_lowerright, SrcAccessor1 sa1,
    00210                  SrcImageIterator2 src2_upperleft, SrcAccessor2 sa2,
    00211                  DestImageIterator dest_upperleft, DestAccessor da,
    00212                  Functor const & f)
    00213 {
    00214     int w = src1_lowerright.x - src1_upperleft.x;
    00215
    00216     for(; src1_upperleft.y < src1_lowerright.y;
    00217             ++src1_upperleft.y, ++src2_upperleft.y, ++dest_upperleft.y)
    00218     {
    00219         combineTwoLines(src1_upperleft.rowIterator(),
    00220                         src1_upperleft.rowIterator() + w, sa1,
    00221                         src2_upperleft.rowIterator(), sa2,
    00222                         dest_upperleft.rowIterator(), da, f);
    00223     }
    00224 }
    00225
    00226 template <class SrcImageIterator1, class SrcAccessor1,
    00227           class SrcImageIterator2, class SrcAccessor2,
    00228           class DestImageIterator, class DestAccessor,
    00229           class Functor>
    00230 inline
    00231 void
    00232 combineTwoImages(triple<SrcImageIterator1, SrcImageIterator1, SrcAccessor1> src1,
    00233              pair<SrcImageIterator2, SrcAccessor2> src2,
    00234              pair<DestImageIterator, DestAccessor> dest,
    00235              Functor const & f)
    00236 {
    00237     combineTwoImages(src1.first, src1.second, src1.third,
    00238                      src2.first, src2.second,
    00239              dest.first, dest.second, f);
    00240 }
    00241
    00242 /********************************************************/
    00243 /*                                                      */
    00244 /*                  combineTwoImagesIf                  */
    00245 /*                                                      */
    00246 /********************************************************/
    00247
    00248 /** \brief Combine ROI of two source images into destination image.
    00249
    00250     The transformation given by the functor is applied to all source
    00251     pixels in the ROI (i.e. whenever the return value of the mask's accessor
    00252     is not zero)
    00253     and the result written into the corresponding destination pixel.
    00254     This is typically used for operations like add and subtract.
    00255     The function uses accessors to access the pixel data.
    00256     Note that the binary functors of the STL can be used in addition to
    00257     the functors specifically defined in \ref CombineFunctor.
    00258     Creation of new functors is easiest by using \ref FunctorExpressions.
    00259
    00260     <b> Declarations:</b>
    00261
    00262     pass arguments explicitly:
    00263     \code
    00264     namespace vigra {
    00265         template <class SrcImageIterator1, class SrcAccessor1,
    00266               class SrcImageIterator2, class SrcAccessor2,
    00267               class MaskImageIterator, class MaskAccessor,
    00268               class DestImageIterator, clas DestAccessor,
    00269               class Functor>
    00270         void
    00271         combineTwoImagesIf(SrcImageIterator1 src1_upperleft,
    00272                    SrcImageIterator1 src1_lowerright, SrcAccessor1 sa1,
    00273                    SrcImageIterator2 src2_upperleft, SrcAccessor2 sa2,
    00274                    MaskImageIterator mask_upperleft, MaskAccessor ma,
    00275                    DestImageIterator dest_upperleft, DestAccessor da,
    00276                    Functor const & f)
    00277     }
    00278     \endcode
    00279
    00280
    00281     use argument objects in conjunction with \ref ArgumentObjectFactories:
    00282     \code
    00283     namespace vigra {
    00284         template <class SrcImageIterator1, class SrcAccessor1,
    00285               class SrcImageIterator2, class SrcAccessor2,
    00286               class MaskImageIterator, class MaskAccessor,
    00287               class DestImageIterator, clas DestAccessor,
    00288               class Functor>
    00289         void
    00290         combineTwoImagesIf(triple<SrcImageIterator1, SrcImageIterator1, SrcAccessor1> src1,
    00291                    pair<SrcImageIterator2, SrcAccessor2> src2,
    00292                    pair<MaskImageIterator, MaskAccessor> mask,
    00293                    pair<DestImageIterator, DestAccessor> dest,
    00294                    Functor const & f)
    00295     }
    00296     \endcode
    00297
    00298     <b> Usage:</b>
    00299
    00300         <b>\#include</b> "<a href="combineimages_8hxx-source.html">vigra/combineimages.hxx</a>"<br>
    00301         Namespace: vigra
    00302
    00303     \code
    00304     #include <functional>     // for plus
    00305
    00306     vigra::combineTwoImagesIf(
    00307                 srcIterRange(src1.upperLeft(), src1.lowerRight()),
    00308                 srcIter(src2.upperLeft()),
    00309                 maskIter(mask.upperLeft()),
    00310                 destIter(dest.upperLeft()),
    00311                 std::plus<SrcValueType>());
    00312
    00313     \endcode
    00314
    00315     Note that <TT>SrcValueType</TT> must be replaced with the appropriate type (e.g.
    00316     the promote type of the input images' pixel type, see also
    00317     \ref NumericPromotionTraits)
    00318
    00319     <b> Required Interface:</b>
    00320
    00321     \code
    00322     SrcImageIterator1 src1_upperleft, src1_lowerright;
    00323     SrcImageIterator2 src2_upperleft;
    00324     MaskImageIterator mask_upperleft;
    00325     DestImageIterator dest_upperleft;
    00326     SrcImageIterator1::row_iterator sx1 = src1_upperleft.rowIterator();
    00327     SrcImageIterator2::row_iterator sx2 = src2_upperleft.rowIterator();
    00328     MaskImageIterator::row_iterator mx = mask_upperleft.rowIterator();
    00329     DestImageIterator::row_iterator dx = dest_upperleft.rowIterator();
    00330
    00331
    00332     SrcAccessor1 src1_accessor;
    00333     SrcAccessor2 src2_accessor;
    00334     MaskAccessor mask_accessor;
    00335     DestAccessor dest_accessor;
    00336
    00337     Functor functor;
    00338
    00339     if(mask_accessor(mx))
    00340        dest_accessor.set(
    00341           functor(src1_accessor(sx1), src2_accessor(sx2)),
    00342           dx);
    00343
    00344     \endcode
    00345
    00346 */
    00347 template <class SrcImageIterator1, class SrcAccessor1,
    00348           class SrcImageIterator2, class SrcAccessor2,
    00349           class MaskImageIterator, class MaskAccessor,
    00350           class DestImageIterator, class DestAccessor,
    00351           class Functor>
    00352 void
    00353 combineTwoImagesIf(SrcImageIterator1 src1_upperleft,
    00354                    SrcImageIterator1 src1_lowerright, SrcAccessor1 sa1,
    00355                    SrcImageIterator2 src2_upperleft, SrcAccessor2 sa2,
    00356                    MaskImageIterator mask_upperleft, MaskAccessor ma,
    00357                    DestImageIterator dest_upperleft, DestAccessor da,
    00358                    Functor const & f)
    00359 {
    00360     int w = src1_lowerright.x - src1_upperleft.x;
    00361
    00362     for(; src1_upperleft.y < src1_lowerright.y;
    00363           ++src1_upperleft.y, ++src2_upperleft.y,
    00364           ++dest_upperleft.y, ++mask_upperleft.y)
    00365     {
    00366         combineTwoLinesIf(src1_upperleft.rowIterator(),
    00367                           src1_upperleft.rowIterator() + w, sa1,
    00368                           src2_upperleft.rowIterator(), sa2,
    00369                           mask_upperleft.rowIterator(), ma,
    00370                           dest_upperleft.rowIterator(), da, f);
    00371     }
    00372 }
    00373
    00374 template <class SrcImageIterator1, class SrcAccessor1,
    00375           class SrcImageIterator2, class SrcAccessor2,
    00376           class MaskImageIterator, class MaskAccessor,
    00377           class DestImageIterator, class DestAccessor,
    00378           class Functor>
    00379 inline
    00380 void
    00381 combineTwoImagesIf(triple<SrcImageIterator1, SrcImageIterator1, SrcAccessor1> src1,
    00382                pair<SrcImageIterator2, SrcAccessor2> src2,
    00383                pair<MaskImageIterator, MaskAccessor> mask,
    00384                pair<DestImageIterator, DestAccessor> dest,
    00385                Functor const & f)
    00386 {
    00387     combineTwoImagesIf(src1.first, src1.second, src1.third,
    00388                        src2.first, src2.second,
    00389                        mask.first, mask.second,
    00390                        dest.first, dest.second, f);
    00391 }
    00392
    00393 /********************************************************/
    00394 /*                                                      */
    00395 /*                  combineThreeImages                  */
    00396 /*                                                      */
    00397 /********************************************************/
    00398
    00399 /** \brief Combine three source images into destination image.
    00400
    00401     The transformation given by the functor is applied to the source
    00402     pixels and the result written into the corresponding destination pixel.
    00403     The function uses accessors to access the pixel data.
    00404     Creation of new functors is easiest by using \ref FunctorExpressions.
    00405
    00406     <b> Declarations:</b>
    00407
    00408     pass arguments explicitly:
    00409     \code
    00410     namespace vigra {
    00411         template <class SrcImageIterator1, class SrcAccessor1,
    00412               class SrcImageIterator2, class SrcAccessor2,
    00413               class SrcImageIterator3, class SrcAccessor3,
    00414               class DestImageIterator, class DestAccessor,
    00415               class Functor>
    00416         void
    00417         combineThreeImages(SrcImageIterator1 src1_upperleft,
    00418                    SrcImageIterator1 src1_lowerright, SrcAccessor1 sa1,
    00419                    SrcImageIterator2 src2_upperleft, SrcAccessor2 sa2,
    00420                    SrcImageIterator3 src2_upperleft, SrcAccessor3 sa3,
    00421                    DestImageIterator dest_upperleft, DestAccessor da,
    00422                    Functor const & f)
    00423     }
    00424     \endcode
    00425
    00426
    00427     use argument objects in conjunction with \ref ArgumentObjectFactories:
    00428     \code
    00429     namespace vigra {
    00430         template <class SrcImageIterator1, class SrcAccessor1,
    00431               class SrcImageIterator2, class SrcAccessor2,
    00432               class SrcImageIterator3, class SrcAccessor3,
    00433               class DestImageIterator, class DestAccessor,
    00434               class Functor>
    00435         void
    00436         combineThreeImages(triple<SrcImageIterator1, SrcImageIterator1, SrcAccessor1> src1,
    00437                  pair<SrcImageIterator2, SrcAccessor2> src2,
    00438                  pair<SrcImageIterator3, SrcAccessor3> src3,
    00439                  pair<DestImageIterator, DestAccessor> dest,
    00440                  Functor const & f)
    00441     }
    00442     \endcode
    00443
    00444     <b> Usage:</b>
    00445
    00446         <b>\#include</b> "<a href="combineimages_8hxx-source.html">vigra/combineimages.hxx</a>"<br>
    00447         Namespace: vigra
    00448
    00449     \code
    00450     vigra::combineThreeImages(
    00451                 srcIterRange(src1.upperLeft(), src1.lowerRight()),
    00452                 srcIter(src2.upperLeft()),
    00453                 srcIter(src3.upperLeft()),
    00454                 destIter(dest.upperLeft()),
    00455                 SomeThreeArgumentFunctor());
    00456
    00457     \endcode
    00458
    00459     <b> Required Interface:</b>
    00460
    00461     \code
    00462     SrcImageIterator1 src1_upperleft, src1_lowerright;
    00463     SrcImageIterator2 src2_upperleft;
    00464     SrcImageIterator3 src3_upperleft;
    00465     DestImageIterator dest_upperleft;
    00466     SrcImageIterator1::row_iterator sx1 = src1_upperleft.rowIterator();
    00467     SrcImageIterator2::row_iterator sx2 = src2_upperleft.rowIterator();
    00468     SrcImageIterator3::row_iterator sx3 = src3_upperleft.rowIterator();
    00469     DestImageIterator::row_iterator dx = dest_upperleft.rowIterator();
    00470
    00471     SrcAccessor1 src1_accessor;
    00472     SrcAccessor2 src2_accessor;
    00473     SrcAccessor3 src3_accessor;
    00474     DestAccessor dest_accessor;
    00475
    00476     Functor functor;
    00477
    00478     dest_accessor.set(
    00479           functor(src1_accessor(sx1),
    00480                   src2_accessor(sx2),
    00481                   src3_accessor(sx3)),
    00482           dx);
    00483
    00484     \endcode
    00485
    00486
    00487 */
    00488 template <class SrcImageIterator1, class SrcAccessor1,
    00489           class SrcImageIterator2, class SrcAccessor2,
    00490           class SrcImageIterator3, class SrcAccessor3,
    00491           class DestImageIterator, class DestAccessor,
    00492           class Functor>
    00493 void
    00494 combineThreeImages(SrcImageIterator1 src1_upperleft,
    00495                    SrcImageIterator1 src1_lowerright, SrcAccessor1 sa1,
    00496                    SrcImageIterator2 src2_upperleft, SrcAccessor2 sa2,
    00497                    SrcImageIterator3 src3_upperleft, SrcAccessor3 sa3,
    00498                    DestImageIterator dest_upperleft, DestAccessor da,
    00499                    Functor const & f)
    00500 {
    00501     int w = src1_lowerright.x - src1_upperleft.x;
    00502
    00503     for(; src1_upperleft.y < src1_lowerright.y;
    00504         ++src1_upperleft.y, ++src2_upperleft.y, ++src3_upperleft.y,
    00505         ++dest_upperleft.y)
    00506     {
    00507         combineThreeLines(src1_upperleft.rowIterator(),
    00508                           src1_upperleft.rowIterator() + w, sa1,
    00509                           src2_upperleft.rowIterator(), sa2,
    00510                           src3_upperleft.rowIterator(), sa3,
    00511                           dest_upperleft.rowIterator(), da, f);
    00512     }
    00513 }
    00514
    00515 template <class SrcImageIterator1, class SrcAccessor1,
    00516           class SrcImageIterator2, class SrcAccessor2,
    00517           class SrcImageIterator3, class SrcAccessor3,
    00518           class DestImageIterator, class DestAccessor,
    00519           class Functor>
    00520 inline
    00521 void
    00522 combineThreeImages(triple<SrcImageIterator1, SrcImageIterator1, SrcAccessor1> src1,
    00523              pair<SrcImageIterator2, SrcAccessor2> src2,
    00524              pair<SrcImageIterator3, SrcAccessor3> src3,
    00525              pair<DestImageIterator, DestAccessor> dest,
    00526              Functor const & f)
    00527 {
    00528     combineThreeImages(src1.first, src1.second, src1.third,
    00529                      src2.first, src2.second,
    00530                      src3.first, src3.second,
    00531                      dest.first, dest.second, f);
    00532 }
    00533
    00534
    00535 //@}
    00536
    00537 /** \addtogroup CombineFunctor Functors to Combine Images
    00538
    00539     Common functors with several arguments
    00540 */
    00541 //@{
    00542
    00543 /********************************************************/
    00544 /*                                                      */
    00545 /*                    MagnitudeFunctor                  */
    00546 /*                                                      */
    00547 /********************************************************/
    00548
    00549 /** Calculate the magnitude from two arguments.
    00550     Can be used in conjunction with \ref gradientBasedTransform().
    00551
    00552     If the gradient is represented by a vector-valued image instead of
    00553     a pair of scalar images, use \ref vigra::VectorNormFunctor.
    00554
    00555     <b> Traits defined:</b>
    00556
    00557     <tt>FunctorTraits::isBinaryFunctor</tt> are true (<tt>VigraTrueType<tt>)
    00558 */
    00559 template <class ValueType>
    00560 class MagnitudeFunctor
    00561 {
    00562   public:
    00563         /** the functor's first argument type
    00564         */
    00565     typedef ValueType first_argument_type;
    00566
    00567         /** the functor's second argument type
    00568         */
    00569     typedef ValueType second_argument_type;
    00570
    00571         /** the functor's result type
    00572         */
    00573     typedef typename NumericTraits<ValueType>::RealPromote result_type;
    00574
    00575         /** \deprecated use first_argument_type, second_argument_type, result_type
    00576         */
    00577     typedef ValueType value_type;
    00578
    00579         /** calculate transform '<TT>sqrt(v1*v1 + v2*v2)</TT>'.
    00580
    00581         */
    00582     result_type operator()(first_argument_type const & v1, second_argument_type const & v2) const
    00583     {
    00584         return VIGRA_CSTD::sqrt(v1*v1 + v2*v2);
    00585     }
    00586 };
    00587
    00588 template <class T>
    00589 class FunctorTraits<MagnitudeFunctor<T> >
    00590 : public FunctorTraitsBase<MagnitudeFunctor<T> >
    00591 {
    00592 public:
    00593     typedef VigraTrueType isBinaryFunctor;
    00594 };
    00595
    00596 /********************************************************/
    00597 /*                                                      */
    00598 /*             RGBGradientMagnitudeFunctor              */
    00599 /*                                                      */
    00600 /********************************************************/
    00601
    00602
    00603 /** Calculate the gradient magnitude from RGB arguments.
    00604     Can be used in conjunction with \ref gradientBasedTransform().
    00605
    00606     <b> Traits defined:</b>
    00607
    00608     <tt>FunctorTraits::isBinaryFunctor</tt> are true (<tt>VigraTrueType<tt>)
    00609 */
    00610 template <class ValueType>
    00611 class RGBGradientMagnitudeFunctor
    00612 {
    00613   public:
    00614         /** the functor's first argument type
    00615         */
    00616     typedef RGBValue<ValueType> first_argument_type;
    00617
    00618         /** the functor's second argument type
    00619         */
    00620     typedef RGBValue<ValueType> second_argument_type;
    00621
    00622         /** the functor's result type
    00623         */
    00624     typedef typename NumericTraits<ValueType>::RealPromote result_type;
    00625
    00626         /** \deprecated use first_argument_type, second_argument_type, result_type
    00627         */
    00628     typedef ValueType value_type;
    00629
    00630         /** Calculate the gradient magnitude form given RGB components.
    00631             The function returns
    00632
    00633             \f[ \sqrt{|\nabla red|^2 + |\nabla green|^2 + |\nabla blue|^2}
    00634             \f]
    00635
    00636             where \f$|\nabla red|^2\f$ is defined by <TT>gx.red()*gx.red() + gy.red()*gy.red()</TT>.
    00637
    00638             <TT>ValueType</TT> (the RGB's component type) must support addition, multiplication,
    00639             abd <TT>sqrt()</TT>.
    00640         */
    00641     result_type
    00642     operator()(first_argument_type const & gx, second_argument_type const & gy) const
    00643     {
    00644         return VIGRA_CSTD::sqrt(gx.red()*gx.red() + gx.green()*gx.green() +
    00645                     gx.blue()*gx.blue() + gy.red()*gy.red() +
    00646                     gy.green()*gy.green() + gy.blue()*gy.blue());
    00647     }
    00648 };
    00649
    00650 template <class T>
    00651 class FunctorTraits<RGBGradientMagnitudeFunctor<T> >
    00652 : public FunctorTraitsBase<RGBGradientMagnitudeFunctor<T> >
    00653 {
    00654 public:
    00655     typedef VigraTrueType isBinaryFunctor;
    00656 };
    00657
    00658 //@}
    00659
    00660 } // namespace vigra
    00661
    00662 #endif // VIGRA_COMBINEIMAGES_HXX

© Ullrich Köthe (koethe@informatik.uni-hamburg.de) Cognitive Systems Group, University of Hamburg, Germany | html generated using doxygen and Python VIGRA 1.4.0 (21 Dec 2005)