{"action":"created","issue":{"url":"https://api.github.com/repos/gtaylor/python-colormath/issues/60","repository_url":"https://api.github.com/repos/gtaylor/python-colormath","labels_url":"https://api.github.com/repos/gtaylor/python-colormath/issues/60/labels{/name}","comments_url":"https://api.github.com/repos/gtaylor/python-colormath/issues/60/comments","events_url":"https://api.github.com/repos/gtaylor/python-colormath/issues/60/events","html_url":"https://github.com/gtaylor/python-colormath/issues/60","id":142474798,"number":60,"title":"Parametric Weighting factors","user":{"login":"markwbrown","id":5036282,"avatar_url":"https://avatars.githubusercontent.com/u/5036282?v=3","gravatar_id":"","url":"https://api.github.com/users/markwbrown","html_url":"https://github.com/markwbrown","followers_url":"https://api.github.com/users/markwbrown/followers","following_url":"https://api.github.com/users/markwbrown/following{/other_user}","gists_url":"https://api.github.com/users/markwbrown/gists{/gist_id}","starred_url":"https://api.github.com/users/markwbrown/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/markwbrown/subscriptions","organizations_url":"https://api.github.com/users/markwbrown/orgs","repos_url":"https://api.github.com/users/markwbrown/repos","events_url":"https://api.github.com/users/markwbrown/events{/privacy}","received_events_url":"https://api.github.com/users/markwbrown/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2016-03-21T21:18:47Z","updated_at":"2016-03-22T03:17:30Z","closed_at":null,"body":"Docs show the CIEDE2000 takes Kl, Kc, and Kh as args, all set at unity to 1, which does not seem to be required. \r\n\r\n`delta_e_cie2000(color1, color2, Kl=1, Kc=1, Kh=1)`\r\n\r\nIn the Sharma, Wu and Dalal paper, these parametric weighting factors are used in equation 22, in the denominators. kl is used once, while kc and kh are used twice. While this would be a big deal if anything other than 1 were used, that is not the case in the application here, and the constancy of the weighting factors makes passing them in as agruments useless."},"comment":{"url":"https://api.github.com/repos/gtaylor/python-colormath/issues/comments/199609625","html_url":"https://github.com/gtaylor/python-colormath/issues/60#issuecomment-199609625","issue_url":"https://api.github.com/repos/gtaylor/python-colormath/issues/60","id":199609625,"user":{"login":"gtaylor","id":75556,"avatar_url":"https://avatars.githubusercontent.com/u/75556?v=3","gravatar_id":"","url":"https://api.github.com/users/gtaylor","html_url":"https://github.com/gtaylor","followers_url":"https://api.github.com/users/gtaylor/followers","following_url":"https://api.github.com/users/gtaylor/following{/other_user}","gists_url":"https://api.github.com/users/gtaylor/gists{/gist_id}","starred_url":"https://api.github.com/users/gtaylor/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gtaylor/subscriptions","organizations_url":"https://api.github.com/users/gtaylor/orgs","repos_url":"https://api.github.com/users/gtaylor/repos","events_url":"https://api.github.com/users/gtaylor/events{/privacy}","received_events_url":"https://api.github.com/users/gtaylor/received_events","type":"User","site_admin":false},"created_at":"2016-03-22T03:17:30Z","updated_at":"2016-03-22T03:17:30Z","body":"Would anyone be interested in submitting a pull request to give us a basis for discussion?"}}