Bump version and update Changes

[convert-color-husl.git] / lib / Convert / Color / LUV.pm

diff --git a/lib/Convert/Color/LUV.pm b/lib/Convert/Color/LUV.pm
index 886deb736f1119adbd19c136ead0e7e2d3ef7424..af09d7977d5e167dde17612841c5532c8ae791c3 100644 (file)
--- a/lib/Convert/Color/LUV.pm
+++ b/lib/Convert/Color/LUV.pm
@@ -1,20 +1,25 @@
 package Convert::Color::LUV;
 
-use 5.014000;
+use 5.008009;
 use strict;
 use warnings;
 use parent qw/Convert::Color/;
 
 use Convert::Color::XYZ;
 
-our $VERSION = '0.001';
+our $VERSION = '1.000';
 
 use constant +{ ## no critic (Capitalization)
-       KAPPA => 903.2962962,
-       EPS => 0.0088564516,
+       KAPPA => (29/3) ** 3,
+       EPS => (6/29) ** 3,
 
-       REF_U => 0.19783000664283,
-       REF_V => 0.46831999493879,
+       REF_X => 3127/3290,
+       REF_Z => 3583/3290,
+};
+
+use constant +{ ## no critic (Capitalization)
+       REF_U => 4 * REF_X / (REF_X + 15 + 3 * REF_Z),
+       REF_V => 9         / (REF_X + 15 + 3 * REF_Z),
 };
 
 __PACKAGE__->register_color_space('luv');
@@ -49,7 +54,7 @@ sub convert_to_xyz {
        my $var_v = $v / (13 * $l) + REF_V;
        my $y = _l_to_y $l;
        my $x = 9 * $y * $var_u / (4 * $var_v);
-       my $z = (9 * $y - (14 * $var_v * $y) - ($var_v * $x)) / (3 * $var_v);
+       my $z = (9 * $y - (15 * $var_v * $y) - ($var_v * $x)) / (3 * $var_v);
        Convert::Color::XYZ->new($x, $y, $z)
 }