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_23.h"
29 VisionProblem_23::VisionProblem_23() { }
31 void VisionProblem_23::generate(int label, Vignette *vignette) {
32 int x_big, y_big, x_small, y_small;
33 Shape big_shape, small_shape;
42 big_shape.randomize(big_part_size / 2, big_part_hole_size / 2);
45 x_big = int(drand48() * Vignette::width);
46 y_big = int(drand48() * Vignette::height);
47 } while(big_shape.overwrites(vignette, x_big, y_big));
50 big_shape.draw(vignette, x_big, y_big);
54 vignette->fill(x_big, y_big, 128);
55 vignette->switch_values(128, 255);
56 // Find a location for a small shape inside
59 small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
60 x_small = int(drand48() * Vignette::width);
61 y_small = int(drand48() * Vignette::height);
62 error = small_shape.overwrites(vignette, x_small, y_small);
64 } while(error && nb_attempts < 10);
67 // Found it, unfill outside, fill inside and draw
68 vignette->replace_value(128, 255);
69 vignette->fill(x_big, y_big, 128);
71 small_shape.draw(vignette, x_small, y_small);
75 small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
76 x_small = int(drand48() * Vignette::width);
77 y_small = int(drand48() * Vignette::height);
78 error = small_shape.overwrites(vignette, x_small, y_small);
80 } while(error && nb_attempts < 10);
82 // Found it, unfill and draw
83 vignette->replace_value(128, 255);
84 small_shape.draw(vignette, x_small, y_small);
88 vignette->fill(x_big, y_big, 128);
91 vignette->switch_values(128, 255);
96 small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
97 x_small = int(drand48() * Vignette::width);
98 y_small = int(drand48() * Vignette::height);
99 error = small_shape.overwrites(vignette, x_small, y_small);
101 } while(error && nb_attempts < 10);
104 small_shape.draw(vignette, x_small, y_small);
105 vignette->fill(x_small, y_small, 128);
108 small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
109 x_small = int(drand48() * Vignette::width);
110 y_small = int(drand48() * Vignette::height);
111 error = small_shape.overwrites(vignette, x_small, y_small);
113 } while(error && nb_attempts < 10);
116 small_shape.draw(vignette, x_small, y_small);
117 vignette->replace_value(128, 255);