2 * svrt is the ``Synthetic Visual Reasoning Test'', an image
3 * generator for evaluating classification performance of machine
4 * learning systems, humans and primates.
6 * Copyright (c) 2009 Idiap Research Institute, http://www.idiap.ch/
7 * Written by Francois Fleuret <francois.fleuret@idiap.ch>
9 * This file is part of svrt.
11 * svrt is free software: you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 3 as
13 * published by the Free Software Foundation.
15 * svrt is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with svrt. If not, see <http://www.gnu.org/licenses/>.
25 #include "vision_problem_22.h"
28 VisionProblem_22::VisionProblem_22() { }
30 void VisionProblem_22::sample_shapes_positions_aligned(int nb_shapes, int *xs, int *ys) {
31 for(int n = 0; n < nb_shapes - 1; n++) {
32 xs[n] = int(drand48() * (Vignette::width - part_size + 1)) + part_size/2;
33 ys[n] = int(drand48() * (Vignette::height - part_size + 1)) + part_size/2;
35 scalar_t alpha = drand48();
36 xs[nb_shapes - 1] = int(alpha * xs[0] + (1 - alpha) * xs[1]);
37 ys[nb_shapes - 1] = int(alpha * ys[0] + (1 - alpha) * ys[1]);
40 void VisionProblem_22::generate(int label, Vignette *vignette) {
42 int xs[nb_shapes], ys[nb_shapes];
46 sample_shapes_positions_aligned(nb_shapes, xs, ys);
53 for(int n = 0; n < nb_shapes; n++) {
54 if(n == 0 || label == 0) {
55 shape.randomize(part_size/2, hole_size/2);
57 error |= shape.overwrites(vignette, xs[n], ys[n]);
58 shape.draw(vignette, xs[n], ys[n]);