1 //
2 // Copyright 2019 Miral Shah <miralshah2211@gmail.com>
3 //
4 // Use, modification and distribution are subject to the Boost Software License,
5 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt)
7 //
8 #include <boost/gil.hpp>
9 #include <boost/gil/extension/numeric/convolve.hpp>
10
11 #include <boost/core/lightweight_test.hpp>
12
13 #include <cstddef>
14
15 namespace gil = boost::gil;
16
17 std::uint8_t img[] =
18 {
19 0, 0, 0, 0, 0, 0, 0, 0, 0,
20 0, 0, 0, 0, 0, 0, 0, 0, 0,
21 0, 0, 255, 0, 0, 0, 255, 0, 0,
22 0, 0, 0, 255, 0, 255, 0, 0, 0,
23 0, 0, 0, 0, 255, 0, 0, 0, 0,
24 0, 0, 0, 255, 0, 255, 0, 0, 0,
25 0, 0, 255, 0, 0, 0, 255, 0, 0,
26 0, 0, 0, 0, 0, 0, 0, 0, 0,
27 0, 0, 0, 0, 0, 0, 0, 0, 0
28 };
29
30 std::uint8_t output[] =
31 {
32 0, 0, 0, 0, 0, 0, 0, 0, 0,
33 0, 28, 28, 28, 0, 28, 28, 28, 0,
34 0, 28, 56, 56, 56, 56, 56, 28, 0,
35 0, 28, 56, 85, 85, 85, 56, 28, 0,
36 0, 0, 56, 85, 141, 85, 56, 0, 0,
37 0, 28, 56, 85, 85, 85, 56, 28, 0,
38 0, 28, 56, 56, 56, 56, 56, 28, 0,
39 0, 28, 28, 28, 0, 28, 28, 28, 0,
40 0, 0, 0, 0, 0, 0, 0, 0, 0
41 };
42
test_convolve_2d_with_normalized_mean_filter()43 void test_convolve_2d_with_normalized_mean_filter()
44 {
45 gil::gray8c_view_t src_view =
46 gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(img), 9);
47
48 gil::image<gil::gray8_pixel_t> temp_img(src_view.width(), src_view.height());
49 typename gil::image<gil::gray8_pixel_t>::view_t temp_view = view(temp_img);
50 gil::gray8_view_t dst_view(temp_view);
51
52 std::vector<float> v(9, 1.0f / 9.0f);
53 gil::detail::kernel_2d<float> kernel(v.begin(), v.size(), 1, 1);
54
55 gil::detail::convolve_2d(src_view, kernel, dst_view);
56
57 gil::gray8c_view_t out_view =
58 gil::interleaved_view(9, 9, reinterpret_cast<const gil::gray8_pixel_t*>(output), 9);
59
60 BOOST_TEST(gil::equal_pixels(out_view, dst_view));
61 }
62
main()63 int main()
64 {
65 test_convolve_2d_with_normalized_mean_filter();
66
67 return ::boost::report_errors();
68 }
69