Resolve merge conflicts

Author: meshtag

test/core/image_processing/convolve.cpp

@@ -1,6 +1,7 @@
 //
 // Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
 // Copyright 2021 Pranam Lashkari <[email protected]>
+// Copyright 2021 Prathamesh Tagore <[email protected]>
 //
 // Distributed under the Boost Software License, Version 1.0
 // See accompanying file LICENSE_1_0.txt or copy at
@@ -101,7 +102,6 @@ struct test_image_5x5_kernel_3x3_identity
 
         auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
         gil::detail::convolve_1d<pixel_t>(gil::const_view(img_out), kernel, gil::view(img_out));
-        // TODO: Test different boundary options
 
         BOOST_TEST(gil::equal_pixels(gil::const_view(img), gil::const_view(img_out)));
     }
@@ -111,12 +111,210 @@ struct test_image_5x5_kernel_3x3_identity
     }
 };
 
+// Convention used for naming variables : 
+// 1. img : Original image which is to be used for testing.
+// 2. img_out : Output image obtained after applying 1D row and column convolution using library
+// function.
+// 3. img_expected_row : Expected image after applying row convolution on "img".
+// 4. img_expected_col : Expected image after applying column convolution on "img_expected_row".
+
+struct test_image_5x5_kernel_1x9_boundary_extend_zero
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto img = fixture::generate_image<image_t>(5, 5, fixture::random_value<channel_t>{});
+        auto img_view = gil::view(img);
+        image_t img_out(img), img_expected_row(img_view.width(), img_view.height());
+        image_t img_expected_col(img_view.width(), img_view.height());
+        unsigned int const kernel_shift_offset = 2;
+
+        fixture::row_conv1D_offset_img_generator(img_view, gil::view(img_expected_row),
+            kernel_shift_offset);
+        fixture::col_conv1D_offset_img_generator(gil::view(img_expected_row),
+            gil::view(img_expected_col), kernel_shift_offset);
+
+        auto const kernel_shift_by_two = fixture::create_kernel<channel_t>(
+            {0, 0, 0, 0, 0, 0, 1, 0, 0});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img), kernel_shift_by_two,
+            gil::view(img_out), boost::gil::boundary_option::extend_zero);
+
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img_out), gil::const_view(img_expected_col)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(
+            test_image_5x5_kernel_1x9_boundary_extend_zero{});
+    }
+};
+
+struct test_image_5x5_kernel_1x9_boundary_extend_constant
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto img = fixture::generate_image<image_t>(5, 5, fixture::random_value<channel_t>{});
+        auto img_view = gil::view(img);
+        image_t img_out(img), img_expected_row(img);
+        unsigned int const kernel_shift_offset = 2;
+
+        fixture::row_conv1D_offset_img_generator(img_view, gil::view(img_expected_row),
+            kernel_shift_offset);
+        fixture::row_conv1D_offset_img_generator(img_view, gil::view(img_expected_row),
+            1, 0, 0, img_view.height(), 2);
+
+        image_t img_expected_col(img_expected_row);
+
+        fixture::col_conv1D_offset_img_generator(gil::view(img_expected_row),
+            gil::view(img_expected_col), kernel_shift_offset);
+        fixture::col_conv1D_offset_img_generator(gil::view(img_expected_row),
+            gil::view(img_expected_col), 1, 0, 0, 2, img_view.width());
+
+        auto const kernel_shift_by_two = fixture::create_kernel<channel_t>({0, 0, 0, 0, 0, 0, 1, 0, 0});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img), kernel_shift_by_two,
+            gil::view(img_out), boost::gil::boundary_option::extend_constant);
+
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img_out), gil::const_view(img_expected_col)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(
+            test_image_5x5_kernel_1x9_boundary_extend_constant{});
+    }
+};
+
+struct test_image_5x5_kernel_1x3_boundary_output_zero
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto img = fixture::generate_image<image_t>(5, 5, fixture::random_value<channel_t>{});
+        auto img_view = gil::view(img);
+        image_t img_out(img), img_expected_row(img_view.width(), img_view.height());
+        image_t img_expected_col(img_view.width(), img_view.height());
+        unsigned int const kernel_shift_offset = 1;
+
+        fixture::row_conv1D_offset_img_generator(img_view, gil::view(img_expected_row),
+            kernel_shift_offset, 0, 0, img_view.height(), img_view.width() - 1);
+        fixture::col_conv1D_offset_img_generator(gil::view(img_expected_row),
+            gil::view(img_expected_col), kernel_shift_offset, 0, 0, img_view.height() - 1,
+            img_view.width());
+
+        auto const kernel_shift_by_one = fixture::create_kernel<channel_t>({0, 0, 1});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img), kernel_shift_by_one,
+            gil::view(img_out), boost::gil::boundary_option::output_zero);
+
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img_out), gil::const_view(img_expected_col)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(
+            test_image_5x5_kernel_1x3_boundary_output_zero{});
+    }
+};
+
+struct test_image_5x5_kernel_1x3_boundary_output_ignore
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto img = fixture::generate_image<image_t>(5, 5, fixture::random_value<channel_t>{});
+        auto img_view = gil::view(img);
+        image_t img_out(img), img_expected_row(img);
+        unsigned int const kernel_shift_offset = 1;
+
+        fixture::row_conv1D_offset_img_generator(img_view, gil::view(img_expected_row),
+            kernel_shift_offset, 0, 0, img_view.height(), img_view.width() - 1);
+
+        image_t img_expected_col(img_expected_row);
+
+        fixture::col_conv1D_offset_img_generator(gil::view(img_expected_row),
+            gil::view(img_expected_col), kernel_shift_offset, 0, 0, img_view.height() - 1,
+            img_view.width());
+        
+        auto const kernel_shift_by_one = fixture::create_kernel<channel_t>({0, 0, 1});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img), kernel_shift_by_one,
+            gil::view(img_out), gil::boundary_option::output_ignore);
+
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img_out), gil::const_view(img_expected_col)));
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(
+            test_image_5x5_kernel_1x3_boundary_output_ignore{});
+    }
+};
+
+struct test_image_5x5_kernel_1x3_boundary_extend_padded
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        using image_t = Image;
+        using pixel_t = typename image_t::value_type;
+        using channel_t = typename gil::channel_type<pixel_t>::type;
+        auto img = fixture::generate_image<image_t>(5, 5, fixture::random_value<channel_t>{});
+        auto img_view = gil::view(img);
+        image_t img_out(img), img_expected_row(img);
+        unsigned int const kernel_shift_offset = 1;
+
+        fixture::row_conv1D_offset_img_generator(img_view, gil::view(img_expected_row),
+            kernel_shift_offset);
+
+        image_t img_expected_col(img_expected_row);
+
+        fixture::col_conv1D_offset_img_generator(gil::view(img_expected_row),
+            gil::view(img_expected_col), kernel_shift_offset);
+
+        auto const kernel_shift_by_one = fixture::create_kernel<channel_t>({0, 0, 1});
+        gil::detail::convolve_1d<pixel_t>(gil::const_view(img), kernel_shift_by_one,
+            gil::view(img_out), gil::boundary_option::extend_padded);
+
+        // First row and first column of "img_out" and "img_expected_col" are intentionally made
+        // similar.
+        auto img_out_it1 = gil::view(img_out).col_begin(0);
+        auto img_expected_col_it1 = gil::view(img_expected_col).col_begin(0);
+        for (std::ptrdiff_t x = 0; x < gil::view(img_out).width(); ++x)
+            img_expected_col_it1[x] = img_out_it1[x];
+        
+        auto img_out_it2 = gil::view(img_out).row_begin(0);
+        auto img_expected_col_it2 = gil::view(img_expected_col).row_begin(0);
+        for (std::ptrdiff_t y = 0; y < gil::view(img_out).height(); ++y)
+            img_expected_col_it2[y] = img_out_it2[y];
+        
+        BOOST_TEST(gil::equal_pixels(gil::const_view(img_out), gil::const_view(img_expected_col)));
+        
+    }
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(
+            test_image_5x5_kernel_1x3_boundary_extend_padded{});
+    }
+};
+
 int main()
 {
     test_image_1x1_kernel_1x1_identity::run();
     test_image_1x1_kernel_3x3_identity::run();
     test_image_3x3_kernel_3x3_identity::run();
     test_image_5x5_kernel_3x3_identity::run();
 
+    test_image_5x5_kernel_1x9_boundary_extend_zero::run();
+    test_image_5x5_kernel_1x9_boundary_extend_constant::run();
+    test_image_5x5_kernel_1x3_boundary_output_zero::run();
+    test_image_5x5_kernel_1x3_boundary_output_ignore::run();
+    test_image_5x5_kernel_1x3_boundary_extend_padded::run();
     return ::boost::report_errors();
 }