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LSST Data Management Base Package
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ImageBase.h
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1// -*- lsst-c++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2008, 2009, 2010 LSST Corporation.
6 *
7 * This product includes software developed by the
8 * LSST Project (http://www.lsst.org/).
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the LSST License Statement and
21 * the GNU General Public License along with this program. If not,
22 * see <http://www.lsstcorp.org/LegalNotices/>.
23 */
24
25/*
26 * Support for 2-D images
27 *
28 * This file contains the basic 2-d image support for LSST
29 */
30#ifndef LSST_AFW_IMAGE_IMAGEBASE_H
31#define LSST_AFW_IMAGE_IMAGEBASE_H
32
33#include <string>
34#include <utility>
35#include <functional>
36
37#include <memory>
38
39#include "lsst/geom.h"
43#include "lsst/pex/exceptions.h"
44#include "ndarray.h"
45
46namespace lsst {
47namespace afw {
48
49namespace fits {
50class Fits;
51class MemFileManager;
52struct ImageWriteOptions;
53} // namespace fits
54
55namespace image {
56namespace detail {
57//
58// Traits for image types
59//
61struct basic_tag {};
63struct Image_tag : public basic_tag {};
65template <typename ImageT>
67 using image_category = typename ImageT::image_category;
68};
69//
70std::string const wcsNameForXY0 = "A"; // the name of the WCS to use to save (X0, Y0) to FITS files; e.g. "A"
71} // namespace detail
72
75public:
76 explicit CheckIndices(bool check = true) : _check(check) {}
77 operator bool() const { return _check; }
78
79private:
80 bool _check;
81};
82
84template <typename PixelT>
85struct Reference {
86 using type = typename boost::gil::channel_traits<PixelT>::reference;
87};
89template <typename PixelT>
91 using type = typename boost::gil::channel_traits<PixelT>::const_reference;
92};
93
94enum ImageOrigin { PARENT, LOCAL };
95
97//
98// You are not expected to use this class directly in your own code; use one of the
99// specialised subclasses
100//
101template <typename PixelT>
103private:
104 using _view_t = typename lsst::afw::image::detail::types_traits<PixelT>::view_t;
105 using _const_view_t = typename lsst::afw::image::detail::types_traits<PixelT>::const_view_t;
106
107 using Manager = ndarray::Manager;
108
109public:
111
113 using SinglePixel = PixelT;
115 using Pixel = PixelT;
121 using xy_locator = typename _view_t::xy_locator;
123 using const_xy_locator = typename _view_t::xy_locator::const_t;
125 using iterator = typename _view_t::iterator;
127 using const_iterator = typename _const_view_t::iterator;
129 using reverse_iterator = typename _view_t::reverse_iterator;
131 using const_reverse_iterator = typename _const_view_t::reverse_iterator;
133 using x_iterator = typename _view_t::x_iterator;
139 using xy_x_iterator = typename _view_t::x_iterator;
141 using const_x_iterator = typename _const_view_t::x_iterator;
143 using y_iterator = typename _view_t::y_iterator;
145 using xy_y_iterator = typename _view_t::y_iterator;
147 using const_y_iterator = typename _const_view_t::y_iterator;
149 using Array = typename ndarray::Array<PixelT, 2, 1>;
151 using ConstArray = typename ndarray::Array<const PixelT, 2, 1>;
152
153 template <typename OtherPixelT>
154 friend class ImageBase; // needed by generalised copy constructors
155
157 template <typename SinglePixelT>
159 return SinglePixel(rhs);
160 }
161 //
162 // DecoratedImage needs enough access to ImageBase to read data from disk; we might be able to design
163 // around this
164 //
165 template <typename>
166 friend class DecoratedImage;
167 template <typename, typename, typename>
168 friend class MaskedImage;
175 explicit ImageBase(const lsst::geom::Extent2I& dimensions = lsst::geom::Extent2I());
181 explicit ImageBase(const lsst::geom::Box2I& bbox);
192 ImageBase(const ImageBase& src, const bool deep = false);
208 explicit ImageBase(const ImageBase& src, const lsst::geom::Box2I& bbox, const ImageOrigin origin = PARENT,
209 const bool deep = false);
216 template <typename OtherPixelT>
217 ImageBase(const ImageBase<OtherPixelT>& rhs, const bool deep) {
218 if (!deep) {
220 "Only deep copies are permitted for ImageBases with different pixel types");
221 }
222
223 ImageBase<PixelT> tmp(rhs.getBBox());
224 copy_and_convert_pixels(rhs._gilView, tmp._gilView); // from boost::gil
225
226 using std::swap; // See Meyers, Effective C++, Item 25
227 ImageBase<PixelT>::swap(tmp); // See Meyers, Effective C++, Items 11 and 43
228 }
229
239 explicit ImageBase(Array const& array, bool deep = false,
241
242 virtual ~ImageBase() = default;
251 ImageBase& operator=(const ImageBase& rhs);
254 ImageBase& operator=(const PixelT rhs);
255
267 void assign(ImageBase const& rhs, lsst::geom::Box2I const& bbox = lsst::geom::Box2I(),
268 ImageOrigin origin = PARENT);
269
270 // TODO: should deprecate these, but the replacement should take two ints
271 // rather than a Point2I, to keep C++ loops simple
273 PixelReference operator()(int x, int y);
275 PixelReference operator()(int x, int y, CheckIndices const&);
277 PixelConstReference operator()(int x, int y) const;
279 PixelConstReference operator()(int x, int y, CheckIndices const&) const;
280
283
285 PixelConstReference get(lsst::geom::Point2I const& index, ImageOrigin origin) const;
286
288 PixelReference operator[](lsst::geom::Point2I const& index) { return get(index, PARENT); }
289
291 PixelConstReference operator[](lsst::geom::Point2I const& index) const { return get(index, PARENT); }
292
294 int getWidth() const { return _gilView.width(); }
296 int getHeight() const { return _gilView.height(); }
298 int getArea() const { return getWidth()*getHeight(); }
306 int getX0() const { return _origin.getX(); }
314 int getY0() const { return _origin.getY(); }
315
323 lsst::geom::Point2I getXY0() const { return _origin; }
324
331 double const pos,
332 lsst::afw::image::xOrY const xy
333 ) const {
334 double const fullIndex = pos - PixelZeroPos - (xy == X ? getX0() : getY0());
335 int const roundedIndex = static_cast<int>(fullIndex + 0.5);
336 double const residual = fullIndex - roundedIndex;
338 }
339
349 inline double indexToPosition(double ind,
350 lsst::afw::image::xOrY const xy
351 ) const {
352 return ind + PixelZeroPos + (xy == X ? getX0() : getY0());
353 }
354
357
358 void swap(ImageBase& rhs);
359
362 //
363 // Iterators and Locators
364 //
370 iterator begin() const;
372 iterator end() const;
374 reverse_iterator rbegin() const;
376 reverse_iterator rend() const;
378 iterator at(int x, int y) const;
379
387 fast_iterator begin(bool contiguous) const;
395 fast_iterator end(bool contiguous) const;
396
401 x_iterator row_begin(int y) const { return _gilView.row_begin(y); }
402
404 x_iterator row_end(int y) const { return _gilView.row_end(y); }
405
407 x_iterator x_at(int x, int y) const { return _gilView.x_at(x, y); }
408
413 y_iterator col_begin(int x) const { return _gilView.col_begin(x); }
414
416 y_iterator col_end(int x) const { return _gilView.col_end(x); }
417
419 y_iterator y_at(int x, int y) const { return _gilView.y_at(x, y); }
420
425 xy_locator xy_at(int x, int y) const { return xy_locator(_gilView.xy_at(x, y)); }
434 void setXY0(lsst::geom::Point2I const origin) { _origin = origin; }
443 void setXY0(int const x0, int const y0) { setXY0(lsst::geom::Point2I(x0, y0)); }
444
445 lsst::geom::Box2I getBBox(ImageOrigin origin = PARENT) const {
446 if (origin == PARENT) {
447 return lsst::geom::Box2I(_origin, getDimensions());
448 } else
450 }
451
452private:
453 lsst::geom::Point2I _origin;
454 Manager::Ptr _manager;
455 _view_t _gilView;
456
457 // oring of ImageBase in some larger image as returned to and manipulated
458 // by the user
459
460protected:
461 static _view_t _allocateView(lsst::geom::Extent2I const& dimensions, Manager::Ptr& manager);
462 static _view_t _makeSubView(lsst::geom::Extent2I const& dimensions, lsst::geom::Extent2I const& offset,
463 const _view_t& view);
464
465 _view_t _getRawView() const { return _gilView; }
466
467 inline bool isContiguous() const { return begin() + getWidth() * getHeight() == end(); }
468};
469
470template <typename PixelT>
471void swap(ImageBase<PixelT>& a, ImageBase<PixelT>& b);
472
473// Inline template definitions
474
475template <typename PixelT>
477 int rowStride = 1;
478 PixelT * data = nullptr;
479 if (getArea() > 0) {
480 data = reinterpret_cast<PixelT*>(row_begin(0));
481 }
482 if (getHeight() > 1) {
483 rowStride = reinterpret_cast<PixelT*>(row_begin(1)) - reinterpret_cast<PixelT*>(row_begin(0));
484 }
485 return ndarray::external(data,
486 ndarray::makeVector(getHeight(), getWidth()), ndarray::makeVector(rowStride, 1),
487 this->_manager);
488}
489
490template <typename PixelT>
492 int rowStride = 1;
493 PixelT * data = nullptr;
494 if (getArea() > 0) {
495 data = reinterpret_cast<PixelT*>(row_begin(0));
496 }
497 if (getHeight() > 1) {
498 rowStride = reinterpret_cast<PixelT*>(row_begin(1)) - reinterpret_cast<PixelT*>(row_begin(0));
499 }
500 return ndarray::external(data,
501 ndarray::makeVector(getHeight(), getWidth()), ndarray::makeVector(rowStride, 1),
502 this->_manager);
503}
504
505} // namespace image
506} // namespace afw
507} // namespace lsst
508
509#endif
AmpInfoBoxKey bbox
Definition Amplifier.cc:117
char * data
Definition BaseRecord.cc:61
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition Exception.h:48
std::shared_ptr< RecordT > src
Definition Match.cc:48
int y
Definition SpanSet.cc:48
table::Key< int > b
A class used to request that array accesses be checked.
Definition ImageBase.h:74
CheckIndices(bool check=true)
Definition ImageBase.h:76
A container for an Image and its associated metadata.
Definition Image.h:406
The base class for all image classed (Image, Mask, MaskedImage, ...)
Definition ImageBase.h:102
y_iterator col_begin(int x) const
Return an y_iterator to the start of the y'th row.
Definition ImageBase.h:413
iterator end() const
Return an STL compliant iterator to the end of the image.
Definition Image.cc:255
void setXY0(lsst::geom::Point2I const origin)
Set the ImageBase's origin.
Definition ImageBase.h:434
y_iterator y_at(int x, int y) const
Return an y_iterator to the point (x, y) in the image.
Definition ImageBase.h:419
int getX0() const
Return the image's column-origin.
Definition ImageBase.h:306
PixelT Pixel
A pixel in this ImageBase.
Definition ImageBase.h:115
xy_locator xy_at(int x, int y) const
Return an xy_locator at the point (x, y) in the image.
Definition ImageBase.h:425
iterator begin() const
Return an STL compliant iterator to the start of the image.
Definition Image.cc:250
typename _view_t::xy_locator xy_locator
An xy_locator.
Definition ImageBase.h:121
void setXY0(int const x0, int const y0)
Set the ImageBase's origin.
Definition ImageBase.h:443
typename _const_view_t::x_iterator const_x_iterator
A const iterator for traversing the pixels in a row.
Definition ImageBase.h:141
static _view_t _allocateView(lsst::geom::Extent2I const &dimensions, Manager::Ptr &manager)
Definition Image.cc:45
typename _const_view_t::iterator const_iterator
An STL compliant const iterator.
Definition ImageBase.h:127
typename Reference< PixelT >::type PixelReference
A Reference to a PixelT.
Definition ImageBase.h:117
typename _view_t::iterator iterator
An STL compliant iterator.
Definition ImageBase.h:125
PixelReference operator()(int x, int y)
Return a reference to the pixel (x, y) in LOCAL coordinates.
Definition Image.cc:171
static _view_t _makeSubView(lsst::geom::Extent2I const &dimensions, lsst::geom::Extent2I const &offset, const _view_t &view)
Definition Image.cc:65
int getWidth() const
Return the number of columns in the image.
Definition ImageBase.h:294
typename _view_t::xy_locator::const_t const_xy_locator
A const_xy_locator.
Definition ImageBase.h:123
typename _const_view_t::y_iterator const_y_iterator
A const iterator for traversing the pixels in a column.
Definition ImageBase.h:147
lsst::geom::Box2I getBBox(ImageOrigin origin=PARENT) const
Definition ImageBase.h:445
typename ndarray::Array< const PixelT, 2, 1 > ConstArray
An immutable ndarray representation of the image.
Definition ImageBase.h:151
typename _const_view_t::reverse_iterator const_reverse_iterator
An STL compliant const reverse iterator.
Definition ImageBase.h:131
PixelReference operator[](lsst::geom::Point2I const &index)
Return a reference to a single pixel in PARENT coordinates (with no bounds check).
Definition ImageBase.h:288
int getY0() const
Return the image's row-origin.
Definition ImageBase.h:314
int getArea() const
Return the area of the image.
Definition ImageBase.h:298
x_iterator x_at(int x, int y) const
Return an x_iterator to the point (x, y) in the image.
Definition ImageBase.h:407
lsst::geom::Extent2I getDimensions() const
Return the image's size; useful for passing to constructors.
Definition ImageBase.h:356
typename ndarray::Array< PixelT, 2, 1 > Array
A mutable ndarray representation of the image.
Definition ImageBase.h:149
void assign(ImageBase const &rhs, lsst::geom::Box2I const &bbox=lsst::geom::Box2I(), ImageOrigin origin=PARENT)
Copy pixels from another image to a specified subregion of this image.
Definition Image.cc:153
std::pair< int, double > positionToIndex(double const pos, lsst::afw::image::xOrY const xy) const
Convert image position to index (nearest integer and fractional parts)
Definition ImageBase.h:330
x_iterator fast_iterator
A fast STL compliant iterator for contiguous images N.b.
Definition ImageBase.h:137
typename _view_t::reverse_iterator reverse_iterator
An STL compliant reverse iterator.
Definition ImageBase.h:129
int getHeight() const
Return the number of rows in the image.
Definition ImageBase.h:296
y_iterator col_end(int x) const
Return an y_iterator to the start of the y'th row.
Definition ImageBase.h:416
ImageBase & operator=(const ImageBase &rhs)
Shallow assignment operator.
Definition Image.cc:140
iterator at(int x, int y) const
Return an STL compliant iterator at the point (x, y)
Definition Image.cc:270
typename _view_t::y_iterator xy_y_iterator
An iterator for traversing the pixels in a row, created from an xy_locator.
Definition ImageBase.h:145
PixelT SinglePixel
A single Pixel of the same type as those in the ImageBase.
Definition ImageBase.h:113
ImageBase(const ImageBase< OtherPixelT > &rhs, const bool deep)
generalised copy constructor
Definition ImageBase.h:217
double indexToPosition(double ind, lsst::afw::image::xOrY const xy) const
Convert image index to image position.
Definition ImageBase.h:349
x_iterator row_begin(int y) const
Return an x_iterator to the start of the y'th row.
Definition ImageBase.h:401
x_iterator row_end(int y) const
Return an x_iterator to the end of the y'th row.
Definition ImageBase.h:404
typename _view_t::x_iterator x_iterator
An iterator for traversing the pixels in a row.
Definition ImageBase.h:133
reverse_iterator rbegin() const
Return an STL compliant reverse iterator to the start of the image.
Definition Image.cc:260
virtual ~ImageBase()=default
_view_t _getRawView() const
Definition ImageBase.h:465
ConstArray getArray() const
Definition ImageBase.h:491
PixelReference get(lsst::geom::Point2I const &index, ImageOrigin origin)
Return a reference to a single pixel (with no bounds check).
Definition Image.cc:209
typename _view_t::y_iterator y_iterator
An iterator for traversing the pixels in a column.
Definition ImageBase.h:143
lsst::geom::Point2I getXY0() const
Return the image's origin.
Definition ImageBase.h:323
void swap(ImageBase &rhs)
Definition Image.cc:233
typename ConstReference< PixelT >::type PixelConstReference
A ConstReference to a PixelT.
Definition ImageBase.h:119
static SinglePixel PixelCast(SinglePixelT rhs)
Convert a type to our SinglePixel type.
Definition ImageBase.h:158
typename _view_t::x_iterator xy_x_iterator
An iterator for traversing the pixels in a row, created from an xy_locator.
Definition ImageBase.h:139
PixelConstReference operator[](lsst::geom::Point2I const &index) const
Return a reference to a single pixel in PARENT coordinates (with no bounds check).
Definition ImageBase.h:291
reverse_iterator rend() const
Return an STL compliant reverse iterator to the end of the image.
Definition Image.cc:265
A class to manipulate images, masks, and variance as a single object.
Definition MaskedImage.h:74
An integer coordinate rectangle.
Definition Box.h:55
Reports invalid arguments.
Definition Runtime.h:66
std::string const wcsNameForXY0
Definition ImageBase.h:70
const double PixelZeroPos
position of center of pixel 0
Definition ImageUtils.h:44
void swap(Image< PixelT > &a, Image< PixelT > &b)
Definition Image.cc:443
Extent< int, 2 > Extent2I
Definition Extent.h:397
metafunction to extract const reference type from PixelT
Definition ImageBase.h:90
typename boost::gil::channel_traits< PixelT >::const_reference type
const reference type
Definition ImageBase.h:91
metafunction to extract reference type from PixelT
Definition ImageBase.h:85
typename boost::gil::channel_traits< PixelT >::reference type
reference type
Definition ImageBase.h:86
traits class for image categories
Definition ImageBase.h:66
typename ImageT::image_category image_category
Definition ImageBase.h:67
T swap(T... args)