Revision history for Perl extension Color::Similarity::HCL. 0.05 Sun Apr 18 16:23:51 CEST 2010 - Fixed some rounding errors in the distance_hcl function. 0.04 Wed Oct 17 23:07:49 CEST 2007 - Compatibility with old Math::Trig (reported by David Cantrell). 0.03 Sun Oct 14 19:00:58 CEST 2007 - Corrected the RGB -> HCL transformation as per the research report of the same authors (thanks to David Hoerl) and added a link to the report. - Replace the incorrect use of atan2() with atan() (the codomain is different). - Changed rgb2hcl() interface. 0.02 Mon Mar 12 19:37:15 CET 2007 - Compatibility fixes for Perl 5.6.x. 0.01 Sun Mar 11 12:34:47 CET 2007 - First public release.