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LSST Data Management Base Package
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applyLookupTable.cc
Go to the documentation of this file.
1// -*- LSST-C++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2016 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#include <cstdint>
26
27#include "lsst/pex/exceptions.h"
29
30namespace lsst {
31namespace ip {
32namespace isr {
33
34template<typename PixelT>
37 ndarray::Array<PixelT, 1, 1> const &table,
38 PixelT indOffset
39) {
40 if (table.size() == 0u) {
41 throw LSST_EXCEPT(
43 "Lookup table has zero size."
44 );
45 }
46 int numOutOfRange = 0;
47 int const maxLookupCol = table.size() - 1;
48 for (int col = 0, imHeight = image.getHeight(); col < imHeight; ++col) {
49 for (auto imPtr = image.row_begin(col), end = image.row_end(col); imPtr != end; ++imPtr) {
50 int lookupCol = indOffset + *imPtr;
51 if (lookupCol < 0) {
52 lookupCol = 0;
53 ++numOutOfRange;
54 } else if (lookupCol > maxLookupCol) {
55 lookupCol = maxLookupCol;
56 ++numOutOfRange;
57 }
58 *imPtr += table[lookupCol];
59 }
60 }
61 return numOutOfRange;
62}
63
64#define INSTANTIATE(T) \
65 template int applyLookupTable<T>(afw::image::Image<T> &, ndarray::Array<T, 1, 1> const &, T);
66
69
70}}} // lsst::ip::isr
#define INSTANTIATE(FROMSYS, TOSYS)
Definition Detector.cc:509
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition Exception.h:48
A class to represent a 2-dimensional array of pixels.
Definition Image.h:51
Reports attempts to exceed implementation-defined length limits for some classes.
Definition Runtime.h:76
int applyLookupTable(afw::image::Image< PixelT > &image, ndarray::Array< PixelT, 1, 1 > const &table, PixelT indOffset)
Add the values in a lookup table to an image, e.g.