--- /dev/null
+/*
+ * 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 <francois.fleuret@idiap.ch>
+ *
+ * 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 selector. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "vision_problem_15.h"
+#include "shape.h"
+
+VisionProblem_15::VisionProblem_15() { }
+
+void VisionProblem_15::generate(int label, Vignette *vignette) {
+ int nb_shapes = 4;
+ int xs[nb_shapes], ys[nb_shapes];
+
+ int error;
+ do {
+ do {
+ 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)));
+ }
+ } 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 || label == 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);
+}