/*
* svrt is the ``Synthetic Visual Reasoning Test'', an image
* generator for evaluating classification performance of machine
* learning systems, humans and primates.
*
* Copyright (c) 2009 Idiap Research Institute, http://www.idiap.ch/
* Written by Francois Fleuret
*
* This file is part of svrt.
*
* svrt is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* svrt is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with svrt. If not, see .
*
*/
#include "vision_problem_10.h"
#include "shape.h"
VisionProblem_10::VisionProblem_10() { }
void VisionProblem_10::generate(int label, Vignette *vignette) {
int nb_shapes = 4;
int xs[nb_shapes], ys[nb_shapes];
int error;
do {
do {
if(label == 1) {
scalar_t alpha = drand48() * 2 * M_PI;
scalar_t radius = drand48() * Vignette::width / 2;
scalar_t xc = drand48() * Vignette::width;
scalar_t yc = drand48() * Vignette::height;
for(int n = 0; n < nb_shapes; n++) {
xs[n] = int(xc + part_size/2 +
radius * sin(alpha + n * 2 * M_PI / scalar_t(nb_shapes)));
ys[n] = int(yc + part_size/2 +
radius * cos(alpha + n * 2 * M_PI / scalar_t(nb_shapes)));
}
} else {
for(int n = 0; n < nb_shapes; n++) {
xs[n] = int(drand48() * Vignette::width);
ys[n] = int(drand48() * Vignette::height);
}
}
} while(cluttered_shapes(part_size, nb_shapes, xs, ys));
vignette->clear();
Shape shape;
error = 0;
for(int n = 0; n < nb_shapes; n++) {
if(n == 0) {
shape.randomize(part_size / 2, part_hole_size / 2);
}
error |= shape.overwrites(vignette, xs[n], ys[n]);
shape.draw(vignette, xs[n], ys[n]);
}
} while(error);
}