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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 <[email protected]>
*
* 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 svrt. 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(random_uniform_0_1() * Vignette::width);
y_big = int(random_uniform_0_1() * Vignette::height);
} while(vignette->overwrites(&big_shape, x_big, y_big));
if(!error) {
vignette->store_and_draw(&big_shape, x_big, y_big, 0,
0, big_part_size / 2, 0);
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(random_uniform_0_1() * Vignette::width);
y_small = int(random_uniform_0_1() * Vignette::height);
error = vignette->overwrites(&small_shape, 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);
vignette->store_and_draw(&small_shape, x_small, y_small, 1,
0, small_part_size / 2, 0);
int nb_attempts = 0;
do {
small_shape.randomize(small_part_size / 2, small_part_hole_size / 2);
x_small = int(random_uniform_0_1() * Vignette::width);
y_small = int(random_uniform_0_1() * Vignette::height);
error = vignette->overwrites(&small_shape, x_small, y_small);
nb_attempts++;
} while(error && nb_attempts < 10);
if(!error) {
// Found it, unfill and draw
vignette->replace_value(128, 255);
vignette->store_and_draw(&small_shape, x_small, y_small, 2,
0, small_part_size / 2, 0);
}
}
} else {
vignette->fill(x_big, y_big, 128);
if(random_uniform_0_1() < 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(random_uniform_0_1() * Vignette::width);
y_small = int(random_uniform_0_1() * Vignette::height);
error = vignette->overwrites(&small_shape, x_small, y_small);
nb_attempts++;
} while(error && nb_attempts < 10);
if(!error) {
vignette->store_and_draw(&small_shape, x_small, y_small, 1,
0, small_part_size / 2, 0);
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(random_uniform_0_1() * Vignette::width);
y_small = int(random_uniform_0_1() * Vignette::height);
error = vignette->overwrites(&small_shape, x_small, y_small);
nb_attempts++;
} while(error && nb_attempts < 10);
if(!error) {
vignette->store_and_draw(&small_shape, x_small, y_small, 2,
0, small_part_size / 2, 0);
vignette->replace_value(128, 255);
}
}
}
}
} while(error);
}