--- /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_9.h"
+#include "shape.h"
+
+VisionProblem_9::VisionProblem_9() { }
+
+void VisionProblem_9::generate(int label, Vignette *vignette) {
+ int nb_shapes = 3;
+ int xs[nb_shapes], ys[nb_shapes];
+ Shape big_shape, small_shape;
+
+ int error;
+
+ do {
+ scalar_t x1 = int(drand48() * Vignette::width);
+ scalar_t y1 = int(drand48() * Vignette::height);
+ scalar_t x2 = int(drand48() * Vignette::width);
+ scalar_t y2 = int(drand48() * Vignette::height);
+ scalar_t alpha = 0.25 + 0.5 * drand48();
+
+ big_shape.randomize(part_size, hole_size);
+ small_shape.copy(&big_shape);
+ small_shape.scale(0.5);
+
+ if(label == 0) {
+ xs[0] = int(x1); ys[0] = int(y1);
+ xs[1] = int(x2); ys[1] = int(y2);
+ xs[2] = int(alpha * x1 + (1 - alpha) * x2); ys[2] = int(alpha * y1 + (1 - alpha) * y2);
+ } else {
+ xs[0] = int(x1); ys[0] = int(y1);
+ xs[1] = int(alpha * x1 + (1 - alpha) * x2); ys[1] = int(alpha * y1 + (1 - alpha) * y2);
+ xs[2] = int(x2); ys[2] = int(y2);
+ }
+
+ vignette->clear();
+
+ error = 0;
+ for(int n = 0; n < nb_shapes; n++) {
+ if(n < 2) {
+ error |= small_shape.overwrites(vignette, xs[n], ys[n]);
+ small_shape.draw(vignette, xs[n], ys[n]);
+ } else {
+ error |= big_shape.overwrites(vignette, xs[n], ys[n]);
+ big_shape.draw(vignette, xs[n], ys[n]);
+ }
+ vignette->fill(xs[n], ys[n], 128);
+ }
+
+ vignette->replace_value(128, 255);
+ } while(error);
+}