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 selector. If not, see <http://www.gnu.org/licenses/>.
25 #include "vision_problem_9.h"
28 VisionProblem_9::VisionProblem_9() { }
30 void VisionProblem_9::generate(int label, Vignette *vignette) {
32 int xs[nb_shapes], ys[nb_shapes];
33 Shape big_shape, small_shape;
38 scalar_t x1 = int(random_uniform_0_1() * Vignette::width);
39 scalar_t y1 = int(random_uniform_0_1() * Vignette::height);
40 scalar_t x2 = int(random_uniform_0_1() * Vignette::width);
41 scalar_t y2 = int(random_uniform_0_1() * Vignette::height);
42 scalar_t alpha = 0.25 + 0.5 * random_uniform_0_1();
44 big_shape.randomize(part_size, hole_size);
45 small_shape.copy(&big_shape);
46 small_shape.scale(0.5);
49 xs[0] = int(x1); ys[0] = int(y1);
50 xs[1] = int(x2); ys[1] = int(y2);
51 xs[2] = int(alpha * x1 + (1 - alpha) * x2); ys[2] = int(alpha * y1 + (1 - alpha) * y2);
53 xs[0] = int(x1); ys[0] = int(y1);
54 xs[1] = int(alpha * x1 + (1 - alpha) * x2); ys[1] = int(alpha * y1 + (1 - alpha) * y2);
55 xs[2] = int(x2); ys[2] = int(y2);
61 for(int n = 0; n < nb_shapes; n++) {
63 error |= small_shape.overwrites(vignette, xs[n], ys[n]);
65 small_shape.draw(n, vignette, xs[n], ys[n]);
68 error |= big_shape.overwrites(vignette, xs[n], ys[n]);
70 big_shape.draw(n, vignette, xs[n], ys[n]);
73 vignette->fill(xs[n], ys[n], 128);
76 vignette->replace_value(128, 255);