diff options
Diffstat (limited to 'test/colour_conversion_test.cc')
| -rw-r--r-- | test/colour_conversion_test.cc | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/colour_conversion_test.cc b/test/colour_conversion_test.cc index 7ff93468..b743497b 100644 --- a/test/colour_conversion_test.cc +++ b/test/colour_conversion_test.cc @@ -82,3 +82,23 @@ BOOST_AUTO_TEST_CASE (colour_conversion_test2) check_gamma (cc.out(), 16, true, 1 / 2.6); } +/** Check that the xyz_to_rgb matrix is the inverse of the rgb_to_xyz one */ +BOOST_AUTO_TEST_CASE (colour_conversion_matrix_test) +{ + ColourConversion c = ColourConversion::srgb_to_xyz (); + + boost::numeric::ublas::matrix<double> A = c.rgb_to_xyz (); + boost::numeric::ublas::matrix<double> B = c.xyz_to_rgb (); + + BOOST_CHECK_CLOSE (A(0, 0) * B(0, 0) + A(0, 1) * B(1, 0) + A(0, 2) * B(2, 0), 1, 0.1); + BOOST_CHECK (fabs (A(0, 0) * B(0, 1) + A(0, 1) * B(1, 1) + A(0, 2) * B(2, 1)) < 1e-6); + BOOST_CHECK (fabs (A(0, 0) * B(0, 2) + A(0, 1) * B(1, 2) + A(0, 2) * B(2, 2)) < 1e-6); + + BOOST_CHECK (fabs (A(1, 0) * B(0, 0) + A(1, 1) * B(1, 0) + A(1, 2) * B(2, 0)) < 1e-6); + BOOST_CHECK_CLOSE (A(1, 0) * B(0, 1) + A(1, 1) * B(1, 1) + A(1, 2) * B(2, 1), 1, 0.1); + BOOST_CHECK (fabs (A(1, 0) * B(0, 2) + A(1, 1) * B(1, 2) + A(1, 2) * B(2, 2)) < 1e-6); + + BOOST_CHECK (fabs (A(2, 0) * B(0, 0) + A(2, 1) * B(1, 0) + A(2, 2) * B(2, 0)) < 1e-6); + BOOST_CHECK (fabs (A(2, 0) * B(0, 1) + A(2, 1) * B(1, 1) + A(2, 2) * B(2, 1)) < 1e-6); + BOOST_CHECK_CLOSE (A(2, 0) * B(0, 2) + A(2, 1) * B(1, 2) + A(2, 2) * B(2, 2), 1, 0.1); +} |