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New threshold tests added for multi-channel views
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@miralshah365
miralshah365 committed Jul 17, 2019
1 parent d7884ee commit 8234329
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136 changes: 101 additions & 35 deletions test/core/image_processing/threshold_binary.cpp
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Expand Up @@ -14,58 +14,124 @@

namespace gil = boost::gil;

int main()
{
int height = 4;
int width= 4;
gil::gray8_image_t original(width, height), threshold(width, height),
expected(width, height);
int height = 4;
int width = 4;

//filling original view's upper half part with gray pixels of value 50
//filling original view's lower half part with gray pixels of value 150
gil::fill_pixels(gil::subimage_view(gil::view(original), 0, 0, original.width(),
original.height()/2), gil::gray8_pixel_t(50));
gil::fill_pixels(gil::subimage_view(gil::view(original), 0, original.height()/2,
original.width(), original.height()/2), gil::gray8_pixel_t(150));
gil::gray8_image_t original_gray(width, height), threshold_gray(width, height),
expected_gray(width, height);

gil::rgb8_image_t original_rgb(width, height), threshold_rgb(width, height),
expected_rgb(width, height);

/*------------------------------Threshold Binary-----------------------------------*/

//expected view after thresholding of the original view with threshold value of 100
//filling expected view's upper half part with gray pixels of value 0
//filling expected view's lower half part with gray pixels of value 255
gil::fill_pixels(gil::subimage_view(gil::view(expected), 0, 0, original.width(),
original.height() / 2), gil::gray8_pixel_t(0));
gil::fill_pixels(gil::subimage_view(gil::view(expected), 0, original.height() / 2,
original.width(), original.height() / 2), gil::gray8_pixel_t(255));
void fill_original_gray()
{
//filling original_gray view's upper half part with gray pixels of value 50
//filling original_gray view's lower half part with gray pixels of value 150
gil::fill_pixels(gil::subimage_view(gil::view(original_gray), 0, 0, original_gray.width(),
original_gray.height() / 2), gil::gray8_pixel_t(50));
gil::fill_pixels(gil::subimage_view(gil::view(original_gray), 0, original_gray.height() / 2,
original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(150));
}

gil::threshold_binary(gil::view(original), gil::view(threshold), 100);
void fill_original_rgb()
{
//filling original_rgb view's upper half part with rgb pixels of value 50, 155, 115
//filling original_rgb view's lower half part with rgb pixels of value 203, 9, 60
gil::fill_pixels(gil::subimage_view(gil::view(original_rgb), 0, 0, original_rgb.width(),
original_rgb.height() / 2), gil::rgb8_pixel_t(50, 155, 115));
gil::fill_pixels(gil::subimage_view(gil::view(original_rgb), 0, original_rgb.height() / 2,
original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(203, 9, 60));
}

//comparing threshold view generated by the function with the expected view
BOOST_TEST(gil::equal_pixels(gil::view(threshold), gil::view(expected)));
void binary_gray_to_gray()
{
//expected_gray view after thresholding of the original_gray view with threshold_gray value of 100
//filling expected_gray view's upper half part with gray pixels of value 0
//filling expected_gray view's lower half part with gray pixels of value 255
gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
original_gray.height() / 2), gil::gray8_pixel_t(0));
gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(255));

gil::threshold_binary(gil::view(original_gray), gil::view(threshold_gray), 100);

/*-----------------------Threshold Binary with inverse----------------------------*/
//comparing threshold_gray view generated by the function with the expected_gray view
BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
}

//expected view after thresholding of the original view with threshold value of 100
//filling expected view's upper half part with gray pixels of value 200
//filling expected view's lower half part with gray pixels of value 0
gil::fill_pixels(gil::subimage_view(gil::view(expected), 0, 0, original.width(),
original.height() / 2), gil::gray8_pixel_t(200));
gil::fill_pixels(gil::subimage_view(gil::view(expected), 0, original.height() / 2,
original.width(), original.height() / 2), gil::gray8_pixel_t(0));
void binary_inverse_gray_to_gray()
{
//expected_gray view after thresholding of the original_gray view with threshold_gray value of 100
//filling expected_gray view's upper half part with gray pixels of value 200
//filling expected_gray view's lower half part with gray pixels of value 0
gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, 0, original_gray.width(),
original_gray.height() / 2), gil::gray8_pixel_t(200));
gil::fill_pixels(gil::subimage_view(gil::view(expected_gray), 0, original_gray.height() / 2,
original_gray.width(), original_gray.height() / 2), gil::gray8_pixel_t(0));

gil::threshold_binary
(
gil::view(original),
gil::view(threshold),
gil::view(original_gray),
gil::view(threshold_gray),
100,
200,
gil::threshold_direction::inverse
);

//comparing threshold view generated by the function with the expected view
BOOST_TEST(gil::equal_pixels(gil::view(threshold), gil::view(expected)));
//comparing threshold_gray view generated by the function with the expected_gray view
BOOST_TEST(gil::equal_pixels(gil::view(threshold_gray), gil::view(expected_gray)));
}

void binary_rgb_to_rgb()
{
//expected_rgb view after thresholding of the original_rgb view with threshold value of 100
//filling expected_rgb view's upper half part with rgb pixels of value 0, 165, 165
//filling expected_rgb view's lower half part with rgb pixels of value 165, 0, 0
gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
original_rgb.height() / 2), gil::rgb8_pixel_t(0, 165, 165));
gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(165, 0, 0));

gil::threshold_binary(gil::view(original_rgb), gil::view(threshold_rgb), 100, 165);

//comparing threshold_rgb view generated by the function with the expected_rgb view
BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
}

void binary_inverse_rgb_to_rgb()
{
//expected_rgb view after thresholding of the original_rgb view with threshold value of 100
//filling expected_rgb view's upper half part with rgb pixels of value 90, 0, 0
//filling expected_rgb view's lower half part with rgb pixels of value 0, 90, 90
gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, 0, original_rgb.width(),
original_rgb.height() / 2), gil::rgb8_pixel_t(90, 0, 0));
gil::fill_pixels(gil::subimage_view(gil::view(expected_rgb), 0, original_rgb.height() / 2,
original_rgb.width(), original_rgb.height() / 2), gil::rgb8_pixel_t(0, 90, 90));

gil::threshold_binary
(
gil::view(original_rgb),
gil::view(threshold_rgb),
100,
90,
gil::threshold_direction::inverse
);

//comparing threshold_rgb view generated by the function with the expected_rgb view
BOOST_TEST(gil::equal_pixels(gil::view(threshold_rgb), gil::view(expected_rgb)));
}


int main()
{
fill_original_gray();
fill_original_rgb();

binary_gray_to_gray();
binary_inverse_gray_to_gray();
binary_rgb_to_rgb();
binary_inverse_rgb_to_rgb();

return boost::report_errors();
}

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