pair<int, int> range = pixel_range (film, content);
BOOST_CHECK_EQUAL (range.first, 15);
pair<int, int> range = pixel_range (film, content);
BOOST_CHECK_EQUAL (range.first, 15);
pair<int, int> range = pixel_range (film, content);
BOOST_CHECK_EQUAL (range.first, 0);
pair<int, int> range = pixel_range (film, content);
BOOST_CHECK_EQUAL (range.first, 0);
pair<int, int> range = pixel_range (film, content);
BOOST_CHECK_EQUAL (range.first, 11);
pair<int, int> range = pixel_range (film, content);
BOOST_CHECK_EQUAL (range.first, 11);