/*
* 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_12.h"
#include "shape.h"
VisionProblem_12::VisionProblem_12() { }
void VisionProblem_12::generate(int label, Vignette *vignette) {
int nb_shapes = 3;
scalar_t alpha, beta, gamma;
int xs, ys;
Shape shape;
int error;
do {
scalar_t xc, yc, radius;
xc = (drand48() * 0.5 + 0.25) * Vignette::width;
yc = (drand48() * 0.5 + 0.25) * Vignette::height;
radius = (drand48() * 0.5 + 0.1) * Vignette::width;
alpha = drand48() * 2 * M_PI;
beta = (drand48() * 0.4 + 0.1) * M_PI;
vignette->clear();
error = 0;
for(int n = 0; n < nb_shapes; n++) {
if(label) {
if(n == 0)
gamma = alpha + M_PI - beta/2;
else if(n == 1)
gamma = alpha + M_PI + beta/2;
else
gamma = alpha;
} else {
if(n == 0)
gamma = alpha + M_PI - beta/2;
else if(n == 1)
gamma = alpha;
else
gamma = alpha + M_PI + beta/2;
}
if(n < 2) {
shape.randomize(small_part_size, small_part_hole_size);
} else {
shape.randomize(big_part_size, big_part_hole_size);
}
xs = int(xc + radius * cos(gamma));
ys = int(yc + radius * sin(gamma));
error |= shape.overwrites(vignette, xs, ys);
shape.draw(vignette, xs, ys);
}
} while(error);
}