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LSST Data Management Base Package
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KernelFunctions.cc
Go to the documentation of this file.
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 * Definitions of members of lsst::afw::math
27 */
28#include <iostream>
29
30#include "boost/format.hpp"
31
33
34namespace lsst {
35namespace afw {
36namespace math {
37
38void printKernel(Kernel const &kernel, bool doNormalize, double xPos, double yPos, std::string pixelFmt) {
39 using Pixel = Kernel::Pixel;
40
41 image::Image<Pixel> kImage(kernel.getDimensions());
42 double kSum = kernel.computeImage(kImage, doNormalize, xPos, yPos);
43
44 for (int y = kImage.getHeight() - 1; y >= 0; --y) {
45 for (image::Image<Pixel>::const_x_iterator ptr = kImage.row_begin(y); ptr != kImage.row_end(y);
46 ++ptr) {
47 std::cout << boost::format(pixelFmt) % *ptr << " ";
48 }
50 }
51
52 if (doNormalize && std::abs(static_cast<double>(kSum) - 1.0) > 1.0e-5) {
53 std::cout << boost::format("Warning! Sum of all pixels = %9.5f != 1.0\n") % kSum;
54 }
56}
57} // namespace math
58} // namespace afw
59} // namespace lsst
int getHeight() const
Return the number of rows in the image.
Definition ImageBase.h:296
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
A class to represent a 2-dimensional array of pixels.
Definition Image.h:51
Kernels are used for convolution with MaskedImages and (eventually) Images.
Definition Kernel.h:110
lsst::geom::Extent2I const getDimensions() const
Return the Kernel's dimensions (width, height)
Definition Kernel.h:212
double computeImage(lsst::afw::image::Image< Pixel > &image, bool doNormalize, double x=0.0, double y=0.0) const
Compute an image (pixellized representation of the kernel) in place.
Definition Kernel.cc:76
T endl(T... args)
void printKernel(lsst::afw::math::Kernel const &kernel, bool doNormalize, double x=0, double y=0, std::string pixelFmt="%7.3f")
Print the pixel values of a Kernel to std::cout.