/usr/include/vigra/convolution.hxx is in libvigraimpex-dev 1.9.0+dfsg-10+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 | /************************************************************************/
/* */
/* Copyright 1998-2002 by Ullrich Koethe */
/* */
/* This file is part of the VIGRA computer vision library. */
/* The VIGRA Website is */
/* http://hci.iwr.uni-heidelberg.de/vigra/ */
/* Please direct questions, bug reports, and contributions to */
/* ullrich.koethe@iwr.uni-heidelberg.de or */
/* vigra@informatik.uni-hamburg.de */
/* */
/* Permission is hereby granted, free of charge, to any person */
/* obtaining a copy of this software and associated documentation */
/* files (the "Software"), to deal in the Software without */
/* restriction, including without limitation the rights to use, */
/* copy, modify, merge, publish, distribute, sublicense, and/or */
/* sell copies of the Software, and to permit persons to whom the */
/* Software is furnished to do so, subject to the following */
/* conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the */
/* Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES */
/* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND */
/* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT */
/* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, */
/* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING */
/* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR */
/* OTHER DEALINGS IN THE SOFTWARE. */
/* */
/************************************************************************/
#ifndef VIGRA_CONVOLUTION_HXX
#define VIGRA_CONVOLUTION_HXX
#include <functional>
#include "stdconvolution.hxx"
#include "separableconvolution.hxx"
#include "recursiveconvolution.hxx"
#include "nonlineardiffusion.hxx"
#include "combineimages.hxx"
/** \page Convolution Functions to Convolve Images and Signals
1D and 2D filters, including separable and recursive convolution, and non-linear diffusion
<b>\#include</b> \<vigra/convolution.hxx\><br>
Namespace: vigra
<UL style="list-style-image:url(documents/bullet.gif)">
<LI> \ref CommonConvolutionFilters
<BR> <em>Short-hands for the most common 2D convolution filters</em>
<LI> \ref MultiArrayConvolutionFilters
<BR> <em>Convolution filters for arbitrary dimensional arrays (MultiArray etc.)</em>
<LI> \ref ResamplingConvolutionFilters
<BR> <em>Resampling convolution filters</em>
<LI> \ref StandardConvolution
<BR> <em>2D non-separable convolution, with and without ROI mask </em>
<LI> \ref vigra::Kernel2D
<BR> <em>Generic 2-dimensional discrete convolution kernel </em>
<LI> \ref SeparableConvolution
<BR> <em>1D convolution and separable filters in 2 dimensions </em>
<LI> \ref vigra::Kernel1D
<BR> <em>Generic 1-dimensional discrete convolution kernel </em>
<LI> \ref RecursiveConvolution
<BR> <em>Recursive filters (1st and 2nd order)</em>
<LI> \ref NonLinearDiffusion
<BR> <em>Edge-preserving smoothing </em>
<LI> \ref BorderTreatmentMode
<BR> <em>Choose between different border treatment modes </em>
<LI> \ref KernelArgumentObjectFactories
<BR> <em>Factory functions to create argument objects to simplify passing kernels</em>
</UL>
*/
/** \page KernelArgumentObjectFactories Kernel Argument Object Factories
These factory functions allow to create argument objects for 1D
and 2D convolution kernel analogously to
\ref ArgumentObjectFactories for images.
\section Kernel1dFactory kernel1d()
Pass a \ref vigra::Kernel1D to a 1D or separable convolution algorithm.
These factories can be used to create argument objects when we
are given instances or subclasses of \ref vigra::Kernel1D
(analogous to the \ref ArgumentObjectFactories for images).
These factory functions access <TT>kernel.center()</TT>,
<TT>kernel.left()</TT>, <TT>kernel.right()</TT>, <TT>kernel.accessor()</TT>,
and <TT>kernel.borderTreatment()</TT> to obtain the necessary
information. The following factory functions are provided:
<table>
<tr><th bgcolor="#f0e0c0" colspan=2 align=left>
<TT>\ref vigra::Kernel1D "vigra::Kernel1D<SomeType>" kernel;</TT>
</th>
</tr>
<tr><td>
<TT>kernel1d(kernel)</TT>
</td><td>
create argument object from information provided by
kernel
</td></tr>
<tr><td>
<TT>kernel1d(kernel, vigra::BORDER_TREATMENT_CLIP)</TT>
</td><td>
create argument object from information provided by
kernel, but use given border treatment mode
</td></tr>
<tr><td>
<TT>kernel1d(kerneliterator, kernelaccessor,</TT><br>
<TT> kernelleft, kernelright,</TT><br>
<TT> vigra::BORDER_TREATMENT_CLIP)</TT>
</td><td>
create argument object from explicitly given iterator
(pointing to the center of th kernel), accessor,
left and right boundaries, and border treatment mode
</table>
For usage examples see
\ref SeparableConvolution "one-dimensional and separable convolution functions".
\section Kernel2dFactory kernel2d()
Pass a \ref vigra::Kernel2D to a 2D (non-separable) convolution algorithm.
These factories can be used to create argument objects when we
are given instances or subclasses of \ref vigra::Kernel2D
(analogous to the \ref ArgumentObjectFactories for images).
These factory functions access <TT>kernel.center()</TT>,
<TT>kernel.upperLeft()</TT>, <TT>kernel.lowerRight()</TT>, <TT>kernel.accessor()</TT>,
and <TT>kernel.borderTreatment()</TT> to obtain the necessary
information. The following factory functions are provided:
<table>
<tr><th bgcolor="#f0e0c0" colspan=2 align=left>
<TT>\ref vigra::Kernel2D "vigra::Kernel2D<SomeType>" kernel;</TT>
</th>
</tr>
<tr><td>
<TT>kernel2d(kernel)</TT>
</td><td>
create argument object from information provided by
kernel
</td></tr>
<tr><td>
<TT>kernel2d(kernel, vigra::BORDER_TREATMENT_CLIP)</TT>
</td><td>
create argument object from information provided by
kernel, but use given border treatment mode
</td></tr>
<tr><td>
<TT>kernel2d(kerneliterator, kernelaccessor,</TT>
<TT> upperleft, lowerright,</TT>
<TT> vigra::BORDER_TREATMENT_CLIP)</TT>
</td><td>
create argument object from explicitly given iterator
(pointing to the center of th kernel), accessor,
upper left and lower right corners, and border treatment mode
</table>
For usage examples see \ref StandardConvolution "two-dimensional convolution functions".
*/
namespace vigra {
/********************************************************/
/* */
/* Common convolution filters */
/* */
/********************************************************/
/** \addtogroup CommonConvolutionFilters Common Filters
These functions calculate common filters by appropriate sequences of calls
to \ref separableConvolveX() and \ref separableConvolveY().
*/
//@{
/********************************************************/
/* */
/* convolveImage */
/* */
/********************************************************/
/** \brief Apply two separable filters successively, the first in x-direction,
the second in y-direction.
This function is a shorthand for the concatenation of a call to
\ref separableConvolveX() and \ref separableConvolveY()
with the given kernels.
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor,
class T>
void convolveImage(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
Kernel1D<T> const & kx, Kernel1D<T> const & ky);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor,
class T>
inline void
convolveImage(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
Kernel1D<T> const & kx, Kernel1D<T> const & ky);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), dest(w,h);
...
// implement sobel filter in x-direction
Kernel1D<double> kx, ky;
kx.initSymmetricGradient();
ky.initBinomial(1);
vigra::convolveImage(srcImageRange(src), destImage(dest), kx, ky);
\endcode
*/
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor,
class T>
void convolveImage(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
Kernel1D<T> const & kx, Kernel1D<T> const & ky)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::RealPromote
TmpType;
BasicImage<TmpType> tmp(slowerright - supperleft, SkipInitialization);
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(kx));
separableConvolveY(srcImageRange(tmp),
destIter(dupperleft, da), kernel1d(ky));
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor,
class T>
inline void
convolveImage(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
Kernel1D<T> const & kx, Kernel1D<T> const & ky)
{
convolveImage(src.first, src.second, src.third,
dest.first, dest.second, kx, ky);
}
/********************************************************/
/* */
/* simpleSharpening */
/* */
/********************************************************/
/** \brief Perform simple sharpening function.
This function uses \ref convolveImage() with the following filter:
\code
-sharpening_factor/16.0, -sharpening_factor/8.0, -sharpening_factor/16.0,
-sharpening_factor/8.0, 1.0+sharpening_factor*0.75, -sharpening_factor/8.0,
-sharpening_factor/16.0, -sharpening_factor/8.0, -sharpening_factor/16.0;
\endcode
and uses <TT>BORDER_TREATMENT_REFLECT</TT> as border treatment mode.
<b> Preconditions:</b>
\code
1. sharpening_factor >= 0
2. scale >= 0
\endcode
<b> Declarations:</b>
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void simpleSharpening(SrcIterator src_ul, SrcIterator src_lr, SrcAccessor src_acc,
DestIterator dest_ul, DestAccessor dest_acc, double sharpening_factor)
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline
void simpleSharpening(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest, double sharpening_factor)
{
simpleSharpening(src.first, src.second, src.third,
dest.first, dest.second, sharpening_factor);
}
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), dest(w,h);
...
// sharpening with sharpening_factor = 0.1
vigra::simpleSharpening(srcImageRange(src), destImage(dest), 0.1);
\endcode
*/
doxygen_overloaded_function(template <...> void simpleSharpening)
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void simpleSharpening(SrcIterator src_ul, SrcIterator src_lr, SrcAccessor src_acc,
DestIterator dest_ul, DestAccessor dest_acc, double sharpening_factor)
{
vigra_precondition(sharpening_factor >= 0.0,
"simpleSharpening(): amount of sharpening must be >= 0.");
Kernel2D<double> kernel;
kernel.initExplicitly(Diff2D(-1,-1), Diff2D(1,1)) = -sharpening_factor/16.0, -sharpening_factor/8.0, -sharpening_factor/16.0,
-sharpening_factor/8.0, 1.0+sharpening_factor*0.75, -sharpening_factor/8.0,
-sharpening_factor/16.0, -sharpening_factor/8.0, -sharpening_factor/16.0;
convolveImage(src_ul, src_lr, src_acc, dest_ul, dest_acc,
kernel.center(), kernel.accessor(),
kernel.upperLeft(), kernel.lowerRight() , BORDER_TREATMENT_REFLECT );
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline
void simpleSharpening(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest, double sharpening_factor)
{
simpleSharpening(src.first, src.second, src.third,
dest.first, dest.second, sharpening_factor);
}
/********************************************************/
/* */
/* gaussianSharpening */
/* */
/********************************************************/
/** \brief Perform sharpening function with gaussian filter.
This function uses \ref gaussianSmoothing() at the given scale to create a
temporary image 'smooth' and than blends the original and smoothed image
according to the formula
\code
dest = (1 + sharpening_factor)*src - sharpening_factor*smooth
\endcode
<b> Preconditions:</b>
\code
1. sharpening_factor >= 0
2. scale >= 0
\endcode
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianSharpening(SrcIterator src_ul, SrcIterator src_lr, SrcAccessor src_acc,
DestIterator dest_ul, DestAccessor dest_acc,
double sharpening_factor, double scale)
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianSharpening(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double sharpening_factor, double scale)
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), dest(w,h);
...
// sharpening with sharpening_factor = 3.0
// smoothing with scale = 0.5
vigra::gaussianSmoothing(srcImageRange(src), destImage(dest), 3.0, 0.5);
\endcode
*/
doxygen_overloaded_function(template <...> void gaussianSharpening)
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianSharpening(SrcIterator src_ul, SrcIterator src_lr, SrcAccessor src_acc,
DestIterator dest_ul, DestAccessor dest_acc, double sharpening_factor,
double scale)
{
vigra_precondition(sharpening_factor >= 0.0,
"gaussianSharpening(): amount of sharpening must be >= 0");
vigra_precondition(scale >= 0.0,
"gaussianSharpening(): scale parameter should be >= 0.");
typedef typename NumericTraits<typename SrcAccessor::value_type>::RealPromote ValueType;
BasicImage<ValueType> tmp(src_lr - src_ul, SkipInitialization);
gaussianSmoothing(src_ul, src_lr, src_acc, tmp.upperLeft(), tmp.accessor(), scale);
SrcIterator i_src = src_ul;
DestIterator i_dest = dest_ul;
typename BasicImage<ValueType>::traverser tmp_ul = tmp.upperLeft();
typename BasicImage<ValueType>::traverser i_tmp = tmp_ul;
typename BasicImage<ValueType>::Accessor tmp_acc = tmp.accessor();
for(; i_src.y != src_lr.y ; i_src.y++, i_dest.y++, i_tmp.y++ )
{
for (;i_src.x != src_lr.x ; i_src.x++, i_dest.x++, i_tmp.x++ )
{
dest_acc.set((1.0 + sharpening_factor)*src_acc(i_src) - sharpening_factor*tmp_acc(i_tmp), i_dest);
}
i_src.x = src_ul.x;
i_dest.x = dest_ul.x;
i_tmp.x = tmp_ul.x;
}
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianSharpening(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest, double sharpening_factor,
double scale)
{
gaussianSharpening(src.first, src.second, src.third,
dest.first, dest.second,
sharpening_factor, scale);
}
/********************************************************/
/* */
/* gaussianSmoothing */
/* */
/********************************************************/
/** \brief Perform isotropic Gaussian convolution.
This function is a shorthand for the concatenation of a call to
\ref separableConvolveX() and \ref separableConvolveY() with a
Gaussian kernel of the given scale. If two scales are provided,
smoothing in x and y direction will have different strength.
The function uses <TT>BORDER_TREATMENT_REFLECT</TT>.
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianSmoothing(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
double scale_x, double scale_y = scale_x);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
gaussianSmoothing(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale_x, double scale_y = scale_x);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), dest(w,h);
...
// smooth with scale = 3.0
vigra::gaussianSmoothing(srcImageRange(src), destImage(dest), 3.0);
\endcode
*/
doxygen_overloaded_function(template <...> void gaussianSmoothing)
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void
gaussianSmoothing(SrcIterator supperleft, SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
double scale_x, double scale_y)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::RealPromote
TmpType;
BasicImage<TmpType> tmp(slowerright - supperleft, SkipInitialization);
Kernel1D<double> smooth_x, smooth_y;
smooth_x.initGaussian(scale_x);
smooth_x.setBorderTreatment(BORDER_TREATMENT_REFLECT);
smooth_y.initGaussian(scale_y);
smooth_y.setBorderTreatment(BORDER_TREATMENT_REFLECT);
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(smooth_x));
separableConvolveY(srcImageRange(tmp),
destIter(dupperleft, da), kernel1d(smooth_y));
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
gaussianSmoothing(SrcIterator supperleft, SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
double scale)
{
gaussianSmoothing(supperleft, slowerright, sa,
dupperleft, da,
scale, scale);
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
gaussianSmoothing(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale_x, double scale_y)
{
gaussianSmoothing(src.first, src.second, src.third,
dest.first, dest.second, scale_x, scale_y);
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
gaussianSmoothing(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale)
{
gaussianSmoothing(src.first, src.second, src.third,
dest.first, dest.second, scale, scale);
}
/********************************************************/
/* */
/* gaussianGradient */
/* */
/********************************************************/
/** \brief Calculate the gradient vector by means of a 1st derivatives of
Gaussian filter.
This function is a shorthand for the concatenation of a call to
\ref separableConvolveX() and \ref separableConvolveY() with the
appropriate kernels at the given scale. Note that this function can either produce
two separate result images for the x- and y-components of the gradient, or write
into a vector valued image (with at least two components).
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
// write x and y component of the gradient into separate images
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorY, class DestAccessorY>
void gaussianGradient(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIteratorX dupperleftx, DestAccessorX dax,
DestIteratorY dupperlefty, DestAccessorY day,
double scale);
// write x and y component of the gradient into a vector-valued image
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianGradient(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double scale);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
// write x and y component of the gradient into separate images
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorY, class DestAccessorY>
void
gaussianGradient(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIteratorX, DestAccessorX> destx,
pair<DestIteratorY, DestAccessorY> desty,
double scale);
// write x and y component of the gradient into a vector-valued image
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void
gaussianGradient(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), gradx(w,h), grady(w,h);
...
// calculate gradient vector at scale = 3.0
vigra::gaussianGradient(srcImageRange(src),
destImage(gradx), destImage(grady), 3.0);
\endcode
*/
doxygen_overloaded_function(template <...> void gaussianGradient)
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorY, class DestAccessorY>
void gaussianGradient(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIteratorX dupperleftx, DestAccessorX dax,
DestIteratorY dupperlefty, DestAccessorY day,
double scale)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::RealPromote
TmpType;
BasicImage<TmpType> tmp(slowerright - supperleft, SkipInitialization);
Kernel1D<double> smooth, grad;
smooth.initGaussian(scale);
grad.initGaussianDerivative(scale, 1);
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(grad));
separableConvolveY(srcImageRange(tmp),
destIter(dupperleftx, dax), kernel1d(smooth));
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(smooth));
separableConvolveY(srcImageRange(tmp),
destIter(dupperlefty, day), kernel1d(grad));
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianGradient(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double scale)
{
VectorElementAccessor<DestAccessor> gradx(0, dest), grady(1, dest);
gaussianGradient(supperleft, slowerright, src,
dupperleft, gradx, dupperleft, grady, scale);
}
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorY, class DestAccessorY>
inline void
gaussianGradient(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIteratorX, DestAccessorX> destx,
pair<DestIteratorY, DestAccessorY> desty,
double scale)
{
gaussianGradient(src.first, src.second, src.third,
destx.first, destx.second, desty.first, desty.second, scale);
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
gaussianGradient(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale)
{
gaussianGradient(src.first, src.second, src.third,
dest.first, dest.second, scale);
}
/** \brief Calculate the gradient magnitude by means of a 1st derivatives of
Gaussian filter.
This function calls gaussianGradient() and returns the pixel-wise magnitude of
the resulting gradient vectors. If the original image has multiple bands,
the squared gradient magnitude is computed for each band separately, and the
return value is the square root of the sum of these squared magnitudes.
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianGradientMagnitude(SrcIterator sul,
SrcIterator slr, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double scale);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void
gaussianGradientMagnitude(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), grad(w,h);
...
// calculate gradient magnitude at scale = 3.0
vigra::gaussianGradientMagnitude(srcImageRange(src), destImage(grad), 3.0);
\endcode
*/
doxygen_overloaded_function(template <...> void gaussianGradientMagnitude)
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void gaussianGradientMagnitude(SrcIterator sul,
SrcIterator slr, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double scale)
{
typedef typename NumericTraits<typename SrcAccessor::value_type>::RealPromote TmpType;
BasicImage<TmpType> gradx(slr-sul, SkipInitialization), grady(slr-sul, SkipInitialization);
gaussianGradient(srcIterRange(sul, slr, src),
destImage(gradx), destImage(grady), scale);
combineTwoImages(srcImageRange(gradx), srcImage(grady), destIter(dupperleft, dest),
MagnitudeFunctor<TmpType>());
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
gaussianGradientMagnitude(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale)
{
gaussianGradientMagnitude(src.first, src.second, src.third,
dest.first, dest.second, scale);
}
/********************************************************/
/* */
/* laplacianOfGaussian */
/* */
/********************************************************/
/** \brief Filter image with the Laplacian of Gaussian operator
at the given scale.
This function calls \ref separableConvolveX() and \ref separableConvolveY() with the appropriate 2nd derivative
of Gaussian kernels in x- and y-direction and then sums the results
to get the Laplacian.
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void laplacianOfGaussian(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
double scale);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
laplacianOfGaussian(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), dest(w,h);
...
// calculate Laplacian of Gaussian at scale = 3.0
vigra::laplacianOfGaussian(srcImageRange(src), destImage(dest), 3.0);
\endcode
*/
doxygen_overloaded_function(template <...> void laplacianOfGaussian)
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void laplacianOfGaussian(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
double scale)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::RealPromote
TmpType;
BasicImage<TmpType> tmp(slowerright - supperleft, SkipInitialization),
tmpx(slowerright - supperleft, SkipInitialization),
tmpy(slowerright - supperleft, SkipInitialization);
Kernel1D<double> smooth, deriv;
smooth.initGaussian(scale);
deriv.initGaussianDerivative(scale, 2);
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(deriv));
separableConvolveY(srcImageRange(tmp),
destImage(tmpx), kernel1d(smooth));
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(smooth));
separableConvolveY(srcImageRange(tmp),
destImage(tmpy), kernel1d(deriv));
combineTwoImages(srcImageRange(tmpx), srcImage(tmpy),
destIter(dupperleft, da), std::plus<TmpType>());
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
laplacianOfGaussian(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double scale)
{
laplacianOfGaussian(src.first, src.second, src.third,
dest.first, dest.second, scale);
}
/********************************************************/
/* */
/* hessianMatrixOfGaussian */
/* */
/********************************************************/
/** \brief Filter image with the 2nd derivatives of the Gaussian
at the given scale to get the Hessian matrix.
The Hessian matrix is a symmetric matrix defined as:
\f[
\mbox{\rm Hessian}(I) = \left(
\begin{array}{cc}
G_{xx} \ast I & G_{xy} \ast I \\
G_{xy} \ast I & G_{yy} \ast I
\end{array} \right)
\f]
where \f$G_{xx}, G_{xy}, G_{yy}\f$ denote 2nd derivatives of Gaussians
at the given scale, and
\f$\ast\f$ is the convolution symbol. This function calls
\ref separableConvolveX() and \ref separableConvolveY()
with the appropriate 2nd derivative
of Gaussian kernels and puts the results in
the three destination images. The first destination image will
contain the second derivative in x-direction, the second one the mixed
derivative, and the third one holds the derivative in y-direction.
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
void hessianMatrixOfGaussian(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIteratorX dupperleftx, DestAccessorX dax,
DestIteratorXY dupperleftxy, DestAccessorXY daxy,
DestIteratorY dupperlefty, DestAccessorY day,
double scale);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
inline void
hessianMatrixOfGaussian(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIteratorX, DestAccessorX> destx,
pair<DestIteratorXY, DestAccessorXY> destxy,
pair<DestIteratorY, DestAccessorY> desty,
double scale);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), hxx(w,h), hxy(w,h), hyy(w,h);
...
// calculate Hessian of Gaussian at scale = 3.0
vigra::hessianMatrixOfGaussian(srcImageRange(src),
destImage(hxx), destImage(hxy), destImage(hyy), 3.0);
\endcode
*/
doxygen_overloaded_function(template <...> void hessianMatrixOfGaussian)
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
void hessianMatrixOfGaussian(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIteratorX dupperleftx, DestAccessorX dax,
DestIteratorXY dupperleftxy, DestAccessorXY daxy,
DestIteratorY dupperlefty, DestAccessorY day,
double scale)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::RealPromote
TmpType;
BasicImage<TmpType> tmp(slowerright - supperleft, SkipInitialization);
Kernel1D<double> smooth, deriv1, deriv2;
smooth.initGaussian(scale);
deriv1.initGaussianDerivative(scale, 1);
deriv2.initGaussianDerivative(scale, 2);
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(deriv2));
separableConvolveY(srcImageRange(tmp),
destIter(dupperleftx, dax), kernel1d(smooth));
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(smooth));
separableConvolveY(srcImageRange(tmp),
destIter(dupperlefty, day), kernel1d(deriv2));
separableConvolveX(srcIterRange(supperleft, slowerright, sa),
destImage(tmp), kernel1d(deriv1));
separableConvolveY(srcImageRange(tmp),
destIter(dupperleftxy, daxy), kernel1d(deriv1));
}
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
inline void
hessianMatrixOfGaussian(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIteratorX, DestAccessorX> destx,
pair<DestIteratorXY, DestAccessorXY> destxy,
pair<DestIteratorY, DestAccessorY> desty,
double scale)
{
hessianMatrixOfGaussian(src.first, src.second, src.third,
destx.first, destx.second,
destxy.first, destxy.second,
desty.first, desty.second,
scale);
}
/********************************************************/
/* */
/* structureTensor */
/* */
/********************************************************/
/** \brief Calculate the Structure Tensor for each pixel of
and image, using Gaussian (derivative) filters.
The Structure Tensor is is a smoothed version of the Euclidean product
of the gradient vector with itself. I.e. it's a symmetric matrix defined as:
\f[
\mbox{\rm StructurTensor}(I) = \left(
\begin{array}{cc}
G \ast (I_x I_x) & G \ast (I_x I_y) \\
G \ast (I_x I_y) & G \ast (I_y I_y)
\end{array} \right) = \left(
\begin{array}{cc}
A & C \\
C & B
\end{array} \right)
\f]
where \f$G\f$ denotes Gaussian smoothing at the <i>outer scale</i>,
\f$I_x, I_y\f$ are the gradient components taken at the <i>inner scale</i>,
\f$\ast\f$ is the convolution symbol, and \f$I_x I_x\f$ etc. are pixelwise
products of the 1st derivative images. This function calls
\ref separableConvolveX() and \ref separableConvolveY() with the
appropriate Gaussian kernels and puts the results in
the three separate destination images (where the first one will
contain \f$G \ast (I_x I_x)\f$, the second one \f$G \ast (I_x I_y)\f$, and the
third one holds \f$G \ast (I_y I_y)\f$), or into a single 3-band image (where the bands
hold the result in the same order as above). The latter form is also applicable when
the source image is a multi-band image (e.g. RGB). In this case, tensors are
first computed for each band separately, and then summed up to get a single result tensor.
<b> Declarations:</b>
pass arguments explicitly:
\code
namespace vigra {
// create three separate destination images
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
void structureTensor(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIteratorX dupperleftx, DestAccessorX dax,
DestIteratorXY dupperleftxy, DestAccessorXY daxy,
DestIteratorY dupperlefty, DestAccessorY day,
double inner_scale, double outer_scale);
// create a single 3-band destination image
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void structureTensor(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIterator dupperleft, DestAccessor da,
double inner_scale, double outer_scale);
}
\endcode
use argument objects in conjunction with \ref ArgumentObjectFactories :
\code
namespace vigra {
// create three separate destination images
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
void
structureTensor(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIteratorX, DestAccessorX> destx,
pair<DestIteratorXY, DestAccessorXY> destxy,
pair<DestIteratorY, DestAccessorY> desty,
double nner_scale, double outer_scale);
// create a single 3-band destination image
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void
structureTensor(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double nner_scale, double outer_scale);
}
\endcode
<b> Usage:</b>
<b>\#include</b> \<vigra/convolution.hxx\>
\code
vigra::FImage src(w,h), stxx(w,h), stxy(w,h), styy(w,h);
vigra::BasicImage<TinyVector<float, 3> > st(w,h);
...
// calculate Structure Tensor at inner scale = 1.0 and outer scale = 3.0
vigra::structureTensor(srcImageRange(src),
destImage(stxx), destImage(stxy), destImage(styy), 1.0, 3.0);
// dto. with a single 3-band destination image
vigra::structureTensor(srcImageRange(src), destImage(st), 1.0, 3.0);
\endcode
*/
doxygen_overloaded_function(template <...> void structureTensor)
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
void structureTensor(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor sa,
DestIteratorX dupperleftx, DestAccessorX dax,
DestIteratorXY dupperleftxy, DestAccessorXY daxy,
DestIteratorY dupperlefty, DestAccessorY day,
double inner_scale, double outer_scale)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::RealPromote
TmpType;
BasicImage<TmpType> tmp(slowerright - supperleft, SkipInitialization),
tmpx(slowerright - supperleft, SkipInitialization),
tmpy(slowerright - supperleft, SkipInitialization);
gaussianGradient(srcIterRange(supperleft, slowerright, sa),
destImage(tmpx), destImage(tmpy), inner_scale);
combineTwoImages(srcImageRange(tmpx), srcImage(tmpx),
destImage(tmp), std::multiplies<TmpType>());
gaussianSmoothing(srcImageRange(tmp),
destIter(dupperleftx, dax), outer_scale);
combineTwoImages(srcImageRange(tmpy), srcImage(tmpy),
destImage(tmp), std::multiplies<TmpType>());
gaussianSmoothing(srcImageRange(tmp),
destIter(dupperlefty, day), outer_scale);
combineTwoImages(srcImageRange(tmpx), srcImage(tmpy),
destImage(tmp), std::multiplies<TmpType>());
gaussianSmoothing(srcImageRange(tmp),
destIter(dupperleftxy, daxy), outer_scale);
}
template <class SrcIterator, class SrcAccessor,
class DestIteratorX, class DestAccessorX,
class DestIteratorXY, class DestAccessorXY,
class DestIteratorY, class DestAccessorY>
inline void
structureTensor(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIteratorX, DestAccessorX> destx,
pair<DestIteratorXY, DestAccessorXY> destxy,
pair<DestIteratorY, DestAccessorY> desty,
double inner_scale, double outer_scale)
{
structureTensor(src.first, src.second, src.third,
destx.first, destx.second,
destxy.first, destxy.second,
desty.first, desty.second,
inner_scale, outer_scale);
}
namespace detail {
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void structureTensor(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double inner_scale, double outer_scale,
VigraTrueType /* isScalar */)
{
typedef VectorElementAccessor<DestAccessor> DA;
structureTensor(supperleft, slowerright, src,
dupperleft, DA(0, dest),
dupperleft, DA(1, dest),
dupperleft, DA(2, dest),
inner_scale, outer_scale);
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void structureTensor(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double inner_scale, double outer_scale,
VigraFalseType /* isScalar */)
{
int bands = src.size(supperleft);
typedef VectorElementAccessor<SrcAccessor> SA;
structureTensor(supperleft, slowerright, SA(0, src),
dupperleft, dest,
inner_scale, outer_scale,
VigraTrueType() /* isScalar */);
BasicImage<typename DestAccessor::value_type> st(slowerright - supperleft, SkipInitialization);
for(int k=1; k < bands; ++k)
{
structureTensor(supperleft, slowerright, SA(k, src),
st.upperLeft(), st.accessor(),
inner_scale, outer_scale,
VigraTrueType() /* isScalar */);
combineTwoImages(srcImageRange(st), srcIter(dupperleft, dest), destIter(dupperleft, dest),
std::plus<typename DestAccessor::value_type>());
}
}
} // namespace detail
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
void structureTensor(SrcIterator supperleft,
SrcIterator slowerright, SrcAccessor src,
DestIterator dupperleft, DestAccessor dest,
double inner_scale, double outer_scale)
{
typedef typename
NumericTraits<typename SrcAccessor::value_type>::isScalar isScalar;
detail::structureTensor(supperleft, slowerright, src,
dupperleft, dest, inner_scale, outer_scale, isScalar());
}
template <class SrcIterator, class SrcAccessor,
class DestIterator, class DestAccessor>
inline void
structureTensor(triple<SrcIterator, SrcIterator, SrcAccessor> src,
pair<DestIterator, DestAccessor> dest,
double inner_scale, double outer_scale)
{
structureTensor(src.first, src.second, src.third,
dest.first, dest.second,
inner_scale, outer_scale);
}
//@}
} // namespace vigra
#endif // VIGRA_CONVOLUTION_HXX
|