X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?p=svrt.git;a=blobdiff_plain;f=vision_problem_23.cc;fp=vision_problem_23.cc;h=96f3fd2a8af6425df905545577a9317f8faaf00f;hp=0000000000000000000000000000000000000000;hb=dfc7d0cd9b185a982b9f83d6d862824a62000aea;hpb=471b18a7f4e9cbdfb510f304260ec5e6baeee697

diff --git a/vision_problem_23.cc b/vision_problem_23.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_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);
+}