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// | ||
// Copyright 2019 Miral Shah <miralshah2211@gmail.com> | ||
// | ||
// Use, modification and distribution are subject to the Boost Software License, | ||
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | ||
// http://www.boost.org/LICENSE_1_0.txt) | ||
// | ||
#include <boost/gil/image_processing/threshold.hpp> | ||
#include <boost/gil/image_view.hpp> | ||
#include <boost/gil/algorithm.hpp> | ||
#include <boost/gil/gray.hpp> | ||
#include <boost/core/lightweight_test.hpp> | ||
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namespace gil = boost::gil; | ||
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int height = 2; | ||
int width = 2; | ||
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gil::gray8_image_t original_gray(width, height), otsu_gray(width, height), | ||
expected_gray(width, height); | ||
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gil::rgb8_image_t original_rgb(width, height), otsu_rgb(width, height), expected_rgb(width, height); | ||
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void fill_gray() | ||
{ | ||
gil::view(original_gray)(0, 0) = gil::gray8_pixel_t(56); | ||
gil::view(original_gray)(1, 0) = gil::gray8_pixel_t(89); | ||
gil::view(original_gray)(0, 1) = gil::gray8_pixel_t(206); | ||
gil::view(original_gray)(1, 1) = gil::gray8_pixel_t(139); | ||
} | ||
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void fill_rgb() | ||
{ | ||
gil::view(original_rgb)(0, 0) = gil::rgb8_pixel_t(15, 158, 150); | ||
gil::view(original_rgb)(1, 0) = gil::rgb8_pixel_t(200, 175, 150); | ||
gil::view(original_rgb)(0, 1) = gil::rgb8_pixel_t(230, 170, 150); | ||
gil::view(original_rgb)(1, 1) = gil::rgb8_pixel_t(25, 248, 150); | ||
} | ||
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void test_gray_regular() | ||
{ | ||
gil::view(expected_gray)(0, 0) = gil::gray8_pixel_t(0); | ||
gil::view(expected_gray)(1, 0) = gil::gray8_pixel_t(0); | ||
gil::view(expected_gray)(0, 1) = gil::gray8_pixel_t(255); | ||
gil::view(expected_gray)(1, 1) = gil::gray8_pixel_t(255); | ||
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gil::threshold_optimal( | ||
gil::view(original_gray), | ||
gil::view(otsu_gray), | ||
gil::threshold_optimal_value::otsu | ||
); | ||
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BOOST_TEST(gil::equal_pixels(gil::view(otsu_gray), gil::view(expected_gray))); | ||
} | ||
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void test_gray_inverse() | ||
{ | ||
gil::view(expected_gray)(0, 0) = gil::gray8_pixel_t(255); | ||
gil::view(expected_gray)(1, 0) = gil::gray8_pixel_t(255); | ||
gil::view(expected_gray)(0, 1) = gil::gray8_pixel_t(0); | ||
gil::view(expected_gray)(1, 1) = gil::gray8_pixel_t(0); | ||
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gil::threshold_optimal( | ||
gil::view(original_gray), | ||
gil::view(otsu_gray), | ||
gil::threshold_optimal_value::otsu, | ||
gil::threshold_direction::inverse | ||
); | ||
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BOOST_TEST(gil::equal_pixels(gil::view(otsu_gray), gil::view(expected_gray))); | ||
} | ||
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void test_rgb_regular() | ||
{ | ||
gil::view(expected_rgb)(0, 0) = gil::rgb8_pixel_t(0, 0, 255); | ||
gil::view(expected_rgb)(1, 0) = gil::rgb8_pixel_t(255, 0, 255); | ||
gil::view(expected_rgb)(0, 1) = gil::rgb8_pixel_t(255, 0, 255); | ||
gil::view(expected_rgb)(1, 1) = gil::rgb8_pixel_t(0, 255, 255); | ||
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gil::threshold_optimal( | ||
gil::view(original_rgb), | ||
gil::view(otsu_rgb), | ||
gil::threshold_optimal_value::otsu | ||
); | ||
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BOOST_TEST(gil::equal_pixels(gil::view(otsu_rgb), gil::view(expected_rgb))); | ||
} | ||
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void test_rgb_inverse() | ||
{ | ||
gil::view(expected_rgb)(0, 0) = gil::rgb8_pixel_t(255, 255, 0); | ||
gil::view(expected_rgb)(1, 0) = gil::rgb8_pixel_t(0, 255, 0); | ||
gil::view(expected_rgb)(0, 1) = gil::rgb8_pixel_t(0, 255, 0); | ||
gil::view(expected_rgb)(1, 1) = gil::rgb8_pixel_t(255, 0, 0); | ||
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gil::threshold_optimal( | ||
gil::view(original_rgb), | ||
gil::view(otsu_rgb), | ||
gil::threshold_optimal_value::otsu, | ||
gil::threshold_direction::inverse | ||
); | ||
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BOOST_TEST(gil::equal_pixels(gil::view(otsu_rgb), gil::view(expected_rgb))); | ||
} | ||
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int main() | ||
{ | ||
fill_gray(); | ||
fill_rgb(); | ||
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test_gray_regular(); | ||
test_gray_inverse(); | ||
test_rgb_regular(); | ||
test_rgb_inverse(); | ||
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return boost::report_errors(); | ||
} |