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LSST Data Management Base Package
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ImageSlice.cc
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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 * Provide functions to operate on rows/columns of images
27 */
28#include <vector>
29#include <memory>
30
31#include "lsst/pex/exceptions.h"
33
34namespace ex = lsst::pex::exceptions;
35
36namespace lsst {
37namespace afw {
38namespace image {
39
40template <typename PixelT>
41ImageSlice<PixelT>::ImageSlice(image::Image<PixelT> const &img) : Image<PixelT>(img), _sliceType(ROW) {
42 // verify the img is a slice (row or column)
43 if (img.getWidth() != 1 && img.getHeight() != 1) {
44 throw LSST_EXCEPT(ex::OutOfRangeError, "Input image must be a slice (width or height == 1)");
45 } else if (img.getWidth() == 1 && img.getHeight() == 1) {
46 throw LSST_EXCEPT(ex::InvalidParameterError,
47 "1x1 image ambiguous (could be row or column). "
48 "Perhaps a constant would be better than a slice? ");
49 } else if (img.getWidth() == 1 && img.getHeight() != 1) {
50 _sliceType = COLUMN;
51 } else if (img.getHeight() == 1 && img.getWidth() != 1) {
52 _sliceType = ROW;
53 }
54
55 // what about 1xn images where a 1x1 row slice is desired? ... use a constant instead of a slice
56 // what about nx1 images wehre a 1x1 column slice is desired? ... use a constant instead of a slice
57}
58
59/* ************************************************************************ *
60 *
61 * column operators
62 *
63 * ************************************************************************ */
64
65// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
66// overload +
67
68template <typename PixelT>
70 std::shared_ptr<Image<PixelT>> retImg(new Image<PixelT>(img, true));
71 *retImg += slc;
72 return retImg;
73}
74
75template <typename PixelT>
77 return operator+(img, slc);
78}
79
80template <typename PixelT>
84
85// -----------------------------------------------------------------
86// overload -
87
88template <typename PixelT>
90 std::shared_ptr<Image<PixelT>> retImg(new Image<PixelT>(img, true));
91 *retImg -= slc;
92 return retImg;
93}
94
95template <typename PixelT>
99
100// ******************************************************************
101// overload *
102
103template <typename PixelT>
105 std::shared_ptr<Image<PixelT>> retImg(new Image<PixelT>(img, true));
106 *retImg *= slc;
107 return retImg;
108}
109
110template <typename PixelT>
112 return operator*(img, slc);
113}
114
115template <typename PixelT>
119
120// overload
121
122template <typename PixelT>
124 std::shared_ptr<Image<PixelT>> retImg(new Image<PixelT>(img, true));
125 *retImg /= slc;
126 return retImg;
127}
128
129template <typename PixelT>
133
134/*
135 * Explicit Instantiations
136 *
137 */
139#define INSTANTIATE_SLICE_OP_SYM(TYPE, OP) \
140 template std::shared_ptr<Image<TYPE>> operator OP(Image<TYPE> const &img, ImageSlice<TYPE> const &slc); \
141 template std::shared_ptr<Image<TYPE>> operator OP(ImageSlice<TYPE> const &slc, Image<TYPE> const &img)
142
143#define INSTANTIATE_SLICE_OP_ASYM(TYPE, OP) \
144 template std::shared_ptr<Image<TYPE>> operator OP(Image<TYPE> const &img, ImageSlice<TYPE> const &slc)
145
146#define INSTANTIATE_SLICE_OPEQ(TYPE, OP) \
147 template void operator OP(Image<TYPE> &img, ImageSlice<TYPE> const &slc)
148
149#define INSTANTIATE_SLICES(TYPE) \
150 template ImageSlice<TYPE>::ImageSlice(Image<TYPE> const &image); \
151 INSTANTIATE_SLICE_OP_SYM(TYPE, +); \
152 INSTANTIATE_SLICE_OP_ASYM(TYPE, -); \
153 INSTANTIATE_SLICE_OP_SYM(TYPE, *); \
154 INSTANTIATE_SLICE_OP_ASYM(TYPE, /); \
155 INSTANTIATE_SLICE_OPEQ(TYPE, +=); \
156 INSTANTIATE_SLICE_OPEQ(TYPE, -=); \
157 INSTANTIATE_SLICE_OPEQ(TYPE, *=); \
158 INSTANTIATE_SLICE_OPEQ(TYPE, /=)
159
160INSTANTIATE_SLICES(double);
161INSTANTIATE_SLICES(float);
163} // namespace image
164} // namespace afw
165} // namespace lsst
int getWidth() const
Return the number of columns in the image.
Definition ImageBase.h:294
int getHeight() const
Return the number of rows in the image.
Definition ImageBase.h:296
A class to represent a 2-dimensional array of pixels.
Definition Image.h:51
friend class Image
Definition Image.h:65
A class to specify a slice of an image.
Definition ImageSlice.h:46
ImageSliceType getImageSliceType() const
Definition ImageSlice.h:57
ImageSlice(Image< PixelT > const &img)
Constructor for ImageSlice.
Definition ImageSlice.cc:41
void operate(Image< PixelT > &img, ImageSlice< PixelT > const &slc, typename ImageSlice< PixelT >::ImageSliceType sliceType)
A function to loop over pixels and perform the requested operation.
Definition ImageSlice.h:94
std::shared_ptr< Image< PixelT > > operator+(Image< PixelT > const &img, ImageSlice< PixelT > const &slc)
Overload operator+()
Definition ImageSlice.cc:69
Image< LhsPixelT > & operator+=(Image< LhsPixelT > &lhs, Image< RhsPixelT > const &rhs)
Add lhs to Image rhs (i.e. pixel-by-pixel addition) where types are different.
Definition Image.cc:658
Image< LhsPixelT > & operator-=(Image< LhsPixelT > &lhs, Image< RhsPixelT > const &rhs)
Subtract lhs from Image rhs (i.e. pixel-by-pixel subtraction) where types are different.
Definition Image.cc:664
std::shared_ptr< Image< PixelT > > operator*(Image< PixelT > const &img, ImageSlice< PixelT > const &slc)
Overload operator*()
std::shared_ptr< Image< PixelT > > operator/(Image< PixelT > const &img, ImageSlice< PixelT > const &slc)
Overload operator/()
std::shared_ptr< Image< PixelT > > operator-(Image< PixelT > const &img, ImageSlice< PixelT > const &slc)
Overload operator-()
Definition ImageSlice.cc:89
Image< LhsPixelT > & operator/=(Image< LhsPixelT > &lhs, Image< RhsPixelT > const &rhs)
Divide lhs by Image rhs (i.e. pixel-by-pixel division) where types are different.
Definition Image.cc:676
Image< LhsPixelT > & operator*=(Image< LhsPixelT > &lhs, Image< RhsPixelT > const &rhs)
Multiply lhs by Image rhs (i.e. pixel-by-pixel multiplication) where types are different.
Definition Image.cc:670