+/*
+ * 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_23.h"
+#include "shape.h"
+
+
+VisionProblem_23::VisionProblem_23() { }
+
+void VisionProblem_23::generate(int label, Vignette *vignette) {
+ int x_big, y_big, x_small, y_small;
+ Shape big_shape, small_shape;
+
+ int error;
+ do {
+
+ vignette->clear();
+
+ error = 0;
+
+ big_shape.randomize(big_part_size / 2, big_part_hole_size / 2);
+
+ do {
+ x_big = int(drand48() * Vignette::width);
+ y_big = int(drand48() * Vignette::height);
+ } while(big_shape.overwrites(vignette, x_big, y_big));
+
+ if(!error) {
+ big_shape.draw(vignette, x_big, y_big);
+
+ if(label) {
+ // We fill outside
+ vignette->fill(x_big, y_big, 128);
+ vignette->switch_values(128, 255);
+ // Find a location for a small shape inside
+ int nb_attempts = 0;
+ do {
+ small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
+ x_small = int(drand48() * Vignette::width);
+ y_small = int(drand48() * Vignette::height);
+ error = small_shape.overwrites(vignette, x_small, y_small);
+ nb_attempts++;
+ } while(error && nb_attempts < 10);
+
+ if(!error) {
+ // Found it, unfill outside, fill inside and draw
+ vignette->replace_value(128, 255);
+ vignette->fill(x_big, y_big, 128);
+
+ small_shape.draw(vignette, x_small, y_small);
+
+ int nb_attempts = 0;
+ do {
+ small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
+ x_small = int(drand48() * Vignette::width);
+ y_small = int(drand48() * Vignette::height);
+ error = small_shape.overwrites(vignette, x_small, y_small);
+ nb_attempts++;
+ } while(error && nb_attempts < 10);
+ if(!error) {
+ // Found it, unfill and draw
+ vignette->replace_value(128, 255);
+ small_shape.draw(vignette, x_small, y_small);
+ }
+ }
+ } else {
+ vignette->fill(x_big, y_big, 128);
+
+ if(drand48() < 0.5) {
+ vignette->switch_values(128, 255);
+ }
+
+ int nb_attempts = 0;
+ do {
+ small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
+ x_small = int(drand48() * Vignette::width);
+ y_small = int(drand48() * Vignette::height);
+ error = small_shape.overwrites(vignette, x_small, y_small);
+ nb_attempts++;
+ } while(error && nb_attempts < 10);
+
+ if(!error) {
+ small_shape.draw(vignette, x_small, y_small);
+ vignette->fill(x_small, y_small, 128);
+ int nb_attempts = 0;
+ do {
+ small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
+ x_small = int(drand48() * Vignette::width);
+ y_small = int(drand48() * Vignette::height);
+ error = small_shape.overwrites(vignette, x_small, y_small);
+ nb_attempts++;
+ } while(error && nb_attempts < 10);
+
+ if(!error) {
+ small_shape.draw(vignette, x_small, y_small);
+ vignette->replace_value(128, 255);
+ }
+ }
+ }
+
+ }
+
+ } while(error);
+}
projects / svrt.git / commitdiff