/usr/include/vigra/basicimageview.hxx is in libvigraimpex-dev 1.10.0+git20160211.167be93+dfsg-2+b5.
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 | /************************************************************************/
/* */
/* 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_BASICIMAGEVIEW_HXX
#define VIGRA_BASICIMAGEVIEW_HXX
#include "imageiterator.hxx"
#include "initimage.hxx"
// Bounds checking Macro used if VIGRA_CHECK_BOUNDS is defined.
#ifdef VIGRA_CHECK_BOUNDS
#define VIGRA_ASSERT_INSIDE(diff) \
vigra_precondition(this->isInside(diff), "Index out of bounds")
#else
#define VIGRA_ASSERT_INSIDE(diff)
#endif
namespace vigra {
/********************************************************/
/* */
/* BasicImageView */
/* */
/********************************************************/
/** \brief BasicImage using foreign memory.
This class provides the same interface as \ref vigra::BasicImage
(with the exception of <tt>resize()</tt>) but the image's
memory is provided from the outside instead of allocated internally.
A <tt>BasicImageView</tt> can also be created from a
\ref vigra::MultiArrayView with the appropriate shape -- see
\ref MultiArrayToImage.
<b>\#include</b> \<vigra/basicimageview.hxx\> <br/>
Namespace: vigra
*/
template <class PIXELTYPE>
class BasicImageView
{
public:
/** the BasicImageView's pixel type
*/
typedef PIXELTYPE value_type;
/** the BasicImageView's pixel type
*/
typedef PIXELTYPE PixelType;
/** the BasicImageView's reference type (i.e. the
return type of image[diff] and image(dx,dy))
*/
typedef PIXELTYPE & reference;
/** the BasicImageView's const reference type (i.e. the
return type of image[diff] and image(dx,dy) when image is const)
*/
typedef PIXELTYPE const & const_reference;
/** the BasicImageView's pointer type
*/
typedef PIXELTYPE * pointer;
/** the BasicImageView's const pointer type
*/
typedef PIXELTYPE const * const_pointer;
/** the BasicImageView's 1D random access iterator
(note: lower case 'iterator' is a STL compatible 1D random
access iterator, don't confuse with capitalized Iterator)
*/
typedef PIXELTYPE * iterator;
/** deprecated, use <TT>iterator</TT> instead
*/
typedef PIXELTYPE * ScanOrderIterator;
/** the BasicImageView's 1D random access const iterator
(note: lower case 'const_iterator' is a STL compatible 1D
random access const iterator)
*/
typedef PIXELTYPE const * const_iterator;
/** deprecated, use <TT>const_iterator</TT> instead
*/
typedef PIXELTYPE const * ConstScanOrderIterator;
/** the BasicImageView's 2D random access iterator ('traverser')
*/
typedef ImageIterator<value_type> traverser;
/** deprecated, use <TT>traverser</TT> instead
*/
typedef ImageIterator<value_type> Iterator;
/** the BasicImageView's 2D random access const iterator ('const traverser')
*/
typedef ConstImageIterator<value_type> const_traverser;
/** deprecated, use <TT>const_traverser</TT> instead
*/
typedef ConstImageIterator<value_type> ConstIterator;
/** the row iterator associated with the traverser
*/
typedef typename traverser::row_iterator row_iterator;
/** the const row iterator associated with the const_traverser
*/
typedef typename const_traverser::row_iterator const_row_iterator;
/** the column iterator associated with the traverser
*/
typedef typename traverser::column_iterator column_iterator;
/** the const column iterator associated with the const_traverser
*/
typedef typename const_traverser::column_iterator const_column_iterator;
/** the BasicImageView's difference type (argument type of image[diff])
*/
typedef Diff2D difference_type;
/** the BasicImageView's size type (result type of image.size())
*/
typedef Size2D size_type;
/** the BasicImageView's default accessor
*/
typedef typename
IteratorTraits<traverser>::DefaultAccessor Accessor;
/** the BasicImageView's default const accessor
*/
typedef typename
IteratorTraits<const_traverser>::DefaultAccessor ConstAccessor;
/** construct image of size 0x0
*/
BasicImageView()
: data_(0),
width_(0),
height_(0),
stride_(0)
{}
/** construct view of size w x h
*/
BasicImageView(const_pointer data, std::ptrdiff_t w, std::ptrdiff_t h, std::ptrdiff_t stride = 0)
: data_(const_cast<pointer>(data)),
width_(w),
height_(h),
stride_(stride == 0 ? w : stride)
{}
/** construct view of size size.x x size.y
*/
BasicImageView(const_pointer data, difference_type const & size, std::ptrdiff_t stride = 0)
: data_(const_cast<pointer>(data)),
width_(size.x),
height_(size.y),
stride_(stride == 0 ? size.x : stride)
{}
/** set Image with const value
*/
BasicImageView & init(value_type const & pixel)
{
initImage(upperLeft(), lowerRight(), accessor(), pixel);
return *this;
}
/** width of Image
*/
std::ptrdiff_t width() const
{
return width_;
}
/** height of Image
*/
std::ptrdiff_t height() const
{
return height_;
}
/** stride of Image.
Memory offset between the start of two successive rows.
*/
std::ptrdiff_t stride() const
{
return stride_;
}
/** size of Image
*/
size_type size() const
{
return size_type(width(), height());
}
/** test whether a given coordinate is inside the image
*/
bool isInside(difference_type const & d) const
{
return d.x >= 0 && d.y >= 0 &&
d.x < width() && d.y < height();
}
/** access pixel at given location. <br>
usage: <TT> value_type value = image[Diff2D(1,2)] </TT>
*/
reference operator[](difference_type const & d)
{
VIGRA_ASSERT_INSIDE(d);
return data_[d.y*stride_ + d.x];
}
/** read pixel at given location. <br>
usage: <TT> value_type value = image[Diff2D(1,2)] </TT>
*/
const_reference operator[](difference_type const & d) const
{
VIGRA_ASSERT_INSIDE(difference_type(d));
return data_[d.y*stride_ + d.x];
}
/** access pixel at given location. <br>
usage: <TT> value_type value = image(1,2) </TT>
*/
reference operator()(std::ptrdiff_t dx, std::ptrdiff_t dy)
{
VIGRA_ASSERT_INSIDE(difference_type(dx,dy));
return data_[dy*stride_ + dx];
}
/** read pixel at given location. <br>
usage: <TT> value_type value = image(1,2) </TT>
*/
const_reference operator()(std::ptrdiff_t dx, std::ptrdiff_t dy) const
{
VIGRA_ASSERT_INSIDE(difference_type(dx, dy));
return data_[dy*stride_ + dx];
}
/** access pixel at given location.
Note that the 'x' index is the trailing index. <br>
usage: <TT> value_type value = image[2][1] </TT>
*/
pointer operator[](std::ptrdiff_t dy)
{
VIGRA_ASSERT_INSIDE(difference_type(0, dy));
return data_ + dy*stride_;
}
/** read pixel at given location.
Note that the 'x' index is the trailing index. <br>
usage: <TT> value_type value = image[2][1] </TT>
*/
const_pointer operator[](std::ptrdiff_t dy) const
{
VIGRA_ASSERT_INSIDE(difference_type(0,dy));
return data_ + dy*stride_;
}
/** init 2D random access iterator pointing to upper left pixel
*/
traverser upperLeft()
{
return traverser(data_, stride_);
}
/** init 2D random access iterator pointing to
pixel(width, height), i.e. one pixel right and below lower right
corner of the image as is common in C/C++.
*/
traverser lowerRight()
{
return upperLeft() + size();
}
/** init 2D random access const iterator pointing to upper left pixel
*/
const_traverser upperLeft() const
{
return const_traverser(data_, stride_);
}
/** init 2D random access const iterator pointing to
pixel(width, height), i.e. one pixel right and below lower right
corner of the image as is common in C/C++.
*/
const_traverser lowerRight() const
{
return upperLeft() + size();
}
/** init 1D random access iterator pointing to first pixel.
Note: Only works if stride equals width.
*/
iterator begin()
{
vigra_precondition(stride_ == width_,
"BasicImageView::begin(): "
"can only create scan order iterator if width() == stride().");
return data_;
}
/** init 1D random access iterator pointing past the end.
Note: Only works if stride equals width.
*/
iterator end()
{
vigra_precondition(stride_ == width_,
"BasicImageView::end(): "
"can only create scan order iterator if width() == stride().");
return data_ + width() * height();
}
/** init 1D random access const iterator pointing to first pixel.
Note: Only works if stride equals width.
*/
const_iterator begin() const
{
vigra_precondition(stride_ == width_,
"BasicImageView::begin(): "
"can only create scan order iterator if width() == stride().");
return data_;
}
/** init 1D random access const iterator pointing past the end.
Note: Only works if stride equals width.
*/
const_iterator end() const
{
vigra_precondition(stride_ == width_,
"BasicImageView::end(): "
"can only create scan order iterator if width() == stride().");
return data_ + width() * height();
}
/** init 1D random access iterator pointing to first pixel of row \a y
*/
row_iterator rowBegin(std::ptrdiff_t y)
{
return data_ + stride_ * y;
}
/** init 1D random access iterator pointing past the end of row \a y
*/
row_iterator rowEnd(std::ptrdiff_t y)
{
return rowBegin(y) + width();
}
/** init 1D random access const iterator pointing to first pixel of row \a y
*/
const_row_iterator rowBegin(std::ptrdiff_t y) const
{
return data_ + stride_ * y;
}
/** init 1D random access const iterator pointing past the end of row \a y
*/
const_row_iterator rowEnd(std::ptrdiff_t y) const
{
return rowBegin(y) + width();
}
/** init 1D random access iterator pointing to first pixel of column \a x
*/
column_iterator columnBegin(std::ptrdiff_t x)
{
typedef typename column_iterator::BaseType Iter;
return column_iterator(Iter(data_ + x, stride_));
}
/** init 1D random access iterator pointing past the end of column \a x
*/
column_iterator columnEnd(std::ptrdiff_t x)
{
return columnBegin(x) + height();
}
/** init 1D random access const iterator pointing to first pixel of column \a x
*/
const_column_iterator columnBegin(std::ptrdiff_t x) const
{
typedef typename const_column_iterator::BaseType Iter;
return const_column_iterator(Iter(data_ + x, stride_));
}
/** init 1D random access const iterator pointing past the end of column \a x
*/
const_column_iterator columnEnd(std::ptrdiff_t x) const
{
return columnBegin(x) + height();
}
/** get a pointer to the internal data
*/
const_pointer data() const
{
return data_;
}
/** return default accessor
*/
Accessor accessor()
{
return Accessor();
}
/** return default const accessor
*/
ConstAccessor accessor() const
{
return ConstAccessor();
}
private:
pointer data_;
std::ptrdiff_t width_, height_, stride_;
};
/********************************************************/
/* */
/* argument object factories */
/* */
/********************************************************/
template <class PixelType, class Accessor>
inline triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser, Accessor>
srcImageRange(BasicImageView<PixelType> const & img, Accessor a)
{
return triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser,
Accessor>(img.upperLeft(),
img.lowerRight(),
a);
}
template <class PixelType, class Accessor>
inline triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser, Accessor>
srcImageRange(BasicImageView<PixelType> const & img, Rect2D const & roi, Accessor a)
{
vigra_precondition(roi.left() >= 0 && roi.top() >= 0 &&
roi.right() <= img.width() && roi.bottom() <= img.height(),
"srcImageRange(): ROI rectangle outside image.");
return triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser,
Accessor>(img.upperLeft() + roi.upperLeft(),
img.upperLeft() + roi.lowerRight(),
a);
}
template <class PixelType, class Accessor>
inline pair<typename BasicImageView<PixelType>::const_traverser, Accessor>
srcImage(BasicImageView<PixelType> const & img, Accessor a)
{
return pair<typename BasicImageView<PixelType>::const_traverser,
Accessor>(img.upperLeft(), a);
}
template <class PixelType, class Accessor>
inline pair<typename BasicImageView<PixelType>::const_traverser, Accessor>
srcImage(BasicImageView<PixelType> const & img, Point2D const & ul, Accessor a)
{
vigra_precondition(img.isInside(ul),
"srcImage(): ROI rectangle outside image.");
return pair<typename BasicImageView<PixelType>::const_traverser,
Accessor>(img.upperLeft() + ul, a);
}
template <class PixelType, class Accessor>
inline triple<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser, Accessor>
destImageRange(BasicImageView<PixelType> & img, Accessor a)
{
return triple<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser,
Accessor>(img.upperLeft(),
img.lowerRight(),
a);
}
template <class PixelType, class Accessor>
inline triple<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser, Accessor>
destImageRange(BasicImageView<PixelType> & img, Rect2D const & roi, Accessor a)
{
vigra_precondition(roi.left() >= 0 && roi.top() >= 0 &&
roi.right() <= img.width() && roi.bottom() <= img.height(),
"destImageRange(): ROI rectangle outside image.");
return triple<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser,
Accessor>(img.upperLeft() + roi.upperLeft(),
img.upperLeft() + roi.lowerRight(),
a);
}
template <class PixelType, class Accessor>
inline pair<typename BasicImageView<PixelType>::traverser, Accessor>
destImage(BasicImageView<PixelType> & img, Accessor a)
{
return pair<typename BasicImageView<PixelType>::traverser,
Accessor>(img.upperLeft(), a);
}
template <class PixelType, class Accessor>
inline pair<typename BasicImageView<PixelType>::traverser, Accessor>
destImage(BasicImageView<PixelType> & img, Point2D const & ul, Accessor a)
{
vigra_precondition(img.isInside(ul),
"destImage(): ROI rectangle outside image.");
return pair<typename BasicImageView<PixelType>::traverser,
Accessor>(img.upperLeft() + ul, a);
}
template <class PixelType, class Accessor>
inline pair<typename BasicImageView<PixelType>::const_traverser, Accessor>
maskImage(BasicImageView<PixelType> const & img, Accessor a)
{
return pair<typename BasicImageView<PixelType>::const_traverser,
Accessor>(img.upperLeft(), a);
}
template <class PixelType, class Accessor>
inline pair<typename BasicImageView<PixelType>::const_traverser, Accessor>
maskImage(BasicImageView<PixelType> const & img, Point2D const & ul, Accessor a)
{
vigra_precondition(img.isInside(ul),
"maskImage(): ROI rectangle outside image.");
return pair<typename BasicImageView<PixelType>::const_traverser,
Accessor>(img.upperLeft() + ul, a);
}
/****************************************************************/
template <class PixelType>
inline triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>
srcImageRange(BasicImageView<PixelType> const & img)
{
return triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>(img.upperLeft(),
img.lowerRight(),
img.accessor());
}
template <class PixelType>
inline triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>
srcImageRange(BasicImageView<PixelType> const & img, Rect2D const & roi)
{
vigra_precondition(roi.left() >= 0 && roi.top() >= 0 &&
roi.right() <= img.width() && roi.bottom() <= img.height(),
"srcImageRange(): ROI rectangle outside image.");
return triple<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>(img.upperLeft() + roi.upperLeft(),
img.upperLeft() + roi.lowerRight(),
img.accessor());
}
template <class PixelType>
inline pair< typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>
srcImage(BasicImageView<PixelType> const & img)
{
return pair<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>(img.upperLeft(),
img.accessor());
}
template <class PixelType>
inline pair< typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>
srcImage(BasicImageView<PixelType> const & img, Point2D const & ul)
{
vigra_precondition(img.isInside(ul),
"srcImage(): ROI rectangle outside image.");
return pair<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>(img.upperLeft() + ul,
img.accessor());
}
template <class PixelType>
inline triple< typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>
destImageRange(BasicImageView<PixelType> & img)
{
return triple<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>(img.upperLeft(),
img.lowerRight(),
img.accessor());
}
template <class PixelType>
inline triple< typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>
destImageRange(BasicImageView<PixelType> & img, Rect2D const & roi)
{
vigra_precondition(roi.left() >= 0 && roi.top() >= 0 &&
roi.right() <= img.width() && roi.bottom() <= img.height(),
"destImageRange(): ROI rectangle outside image.");
return triple<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>(img.upperLeft() + roi.upperLeft(),
img.upperLeft() + roi.lowerRight(),
img.accessor());
}
template <class PixelType>
inline pair< typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>
destImage(BasicImageView<PixelType> & img)
{
return pair<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>(img.upperLeft(),
img.accessor());
}
template <class PixelType>
inline pair< typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>
destImage(BasicImageView<PixelType> & img, Point2D const & ul)
{
vigra_precondition(img.isInside(ul),
"destImage(): ROI rectangle outside image.");
return pair<typename BasicImageView<PixelType>::traverser,
typename BasicImageView<PixelType>::Accessor>(img.upperLeft() + ul,
img.accessor());
}
template <class PixelType>
inline pair< typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>
maskImage(BasicImageView<PixelType> const & img)
{
return pair<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>(img.upperLeft(),
img.accessor());
}
template <class PixelType>
inline pair< typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>
maskImage(BasicImageView<PixelType> const & img, Point2D const & ul)
{
vigra_precondition(img.isInside(ul),
"maskImage(): ROI rectangle outside image.");
return pair<typename BasicImageView<PixelType>::const_traverser,
typename BasicImageView<PixelType>::ConstAccessor>(img.upperLeft() + ul,
img.accessor());
}
} // namespace vigra
#undef VIGRA_ASSERT_INSIDE
#endif /* VIGRA_BASICIMAGEVIEW_HXX */
|