132 lines
3.6 KiB
C++
132 lines
3.6 KiB
C++
// Copyright 2003 David Hilvert <dhilvert@auricle.dyndns.org>,
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// <dhilvert@ugcs.caltech.edu>
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/* This file is part of the Anti-Lamenessing Engine.
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The Anti-Lamenessing Engine is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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The Anti-Lamenessing Engine is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the Anti-Lamenessing Engine; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __psf_sum_h__
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#define __psf_sum_h__
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#include "../../point.h"
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#include "psf.h"
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/*
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* Point-spread function module.
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*
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* This module implements the sum (f1 + f2) of point-spread functions f1 and
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* f2. This is not a convolution.
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*/
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class sum : public psf {
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ale_pos _radius;
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psf *f1, *f2;
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ale_real _min_i, _max_i, _min_j, _max_j;
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public:
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/*
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* The following four functions indicate filter boundaries. Filter
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* support may include everything up to and including the boundaries
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* specified here.
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*/
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ale_real min_i() const { return _min_i; }
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ale_real max_i() const { return _max_i; }
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ale_real min_j() const { return _min_j; }
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ale_real max_j() const { return _max_j; }
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/*
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* Get the number of varieties supported by this PSF. These usually
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* correspond to different points in the sensor array.
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*/
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virtual unsigned int varieties() {
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return f1->varieties() * f2->varieties();
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}
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/*
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* Select the variety appropriate for a given position in the sensor
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* array.
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*/
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virtual unsigned int select(unsigned int i, unsigned int j) {
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return (f1->select(i, j) * f2->varieties() + f2->select(i, j));
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}
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/*
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* Response function
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*
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* Get the response to the rectangle bounded by (top, bot, lef, rig).
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* This function must correctly handle points which fall outside of the
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* filter support. The variety of the responding pixel is provided, in
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* case response is not uniform for all pixels (e.g. some sensor arrays
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* stagger red, green, and blue sensors).
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*/
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psf_result operator()(ale_real top, ale_real bot, ale_real lef, ale_real rig,
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unsigned int variety) const {
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psf_result result;
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psf_result r1, r2;
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r1 = (*f1)(top, bot, lef, rig, variety / f2->varieties());
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r2 = (*f2)(top, bot, lef, rig, variety % f2->varieties());
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for (int k1 = 0; k1 < 3; k1++)
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for (int k2 = 0; k2 < 3; k2++)
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result.set_matrix(k1, k2, r1.get_matrix(k1, k2)
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+ r2.get_matrix(k1, k2));
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return result;
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}
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#if 0
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/*
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* Get the average pixel response.
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*/
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psf_result operator()(ale_real top, ale_real bot, ale_real lef, ale_real rig) {
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psf_result result;
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psf_result r1, r2;
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r1 = (*f1)(top, bot, lef, rig);
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r2 = (*f2)(top, bot, lef, rig);
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for (int k1 = 0; k1 < 3; k1++)
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for (int k2 = 0; k2 < 3; k2++)
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result.set_matrix(k1, k2, r1.get_matrix(k1, k2)
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+ r2.get_matrix(k1, k2));
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return result;
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}
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#endif
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sum(psf *f1, psf *f2) {
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this->f1 = f1;
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this->f2 = f2;
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_min_i = f1->min_i();
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_min_j = f1->min_j();
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_max_i = f1->max_i();
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_max_j = f1->max_j();
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if (_min_i > f2->min_i())
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_min_i = f2->min_i();
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if (_min_j > f2->min_j())
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_min_j = f2->min_j();
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if (_max_i < f2->max_i())
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_max_i = f2->max_i();
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if (_max_j < f2->max_j())
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_max_j = f2->max_j();
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}
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};
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#endif
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