X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?p=svrt.git;a=blobdiff_plain;f=vision_problem_9.cc;fp=vision_problem_9.cc;h=2be5c8df0f54db1e489ebb4bebbc52ba44bf64ae;hp=0000000000000000000000000000000000000000;hb=dfc7d0cd9b185a982b9f83d6d862824a62000aea;hpb=471b18a7f4e9cbdfb510f304260ec5e6baeee697

diff --git a/vision_problem_9.cc b/vision_problem_9.cc
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+/*
+ *  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);
+}