Path: ccsf.homeunix.org!ccsf.homeunix.org!news1.wakwak.com!nf1.xephion.ne.jp!onion.ish.org!news.heimat.gr.jp!taurus!newsfeed.media.kyoto-u.ac.jp!newsfeed.icl.net!news.tele.dk!news.tele.dk!small.news.tele.dk!colt.net!fr.colt.net!writer!not-for-mail From: Jean-Marc Desperrier Newsgroups: fj.life.in-japan,sci.lang.japan Subject: Re: Asians have hijacked Japanese study Date: Wed, 03 Nov 2004 17:48:39 +0100 Organization: ImagiNET / Colt Internet Lines: 45 Message-ID: References: <41836fbb$0$25056$afc38c87@news.optusnet.com.au> <2uhcn9F2b4v8dU1@uni-berlin.de> <2uit00F2b8qlvU1@uni-berlin.de> <3z%gd.35952$E93.23651@clgrps12> <4184c52d$0$3585$8fcfb975@news.wanadoo.fr> <2ul43qF29o3n6U1@uni-berlin.de> <2ul4p5F2ammebU1@uni-berlin.de> <2ul6mlF2bk2csU1@uni-berlin.de> <64mhd.86$xs.20@fe02.buzzardnews.com> NNTP-Posting-Host: host.104.92.68.195.rev.coltfrance.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: reader1.imaginet.fr 1099499277 26373 195.68.92.104 (3 Nov 2004 16:27:57 GMT) X-Complaints-To: abuse@imaginet.fr NNTP-Posting-Date: 3 Nov 2004 16:27:57 GMT User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8a5) Gecko/20041018 X-Accept-Language: fr, en-us, en, ja In-Reply-To: Xref: ccsf.homeunix.org fj.life.in-japan:20973 B Robson wrote: > Jean-Marc Desperrier wrote: >> Brandon Berg wrote: >>> "Brett Robson" wrote in message >>>> I'll give you a hint, there are only 3 primary colours. >>> >>> I'll return the favor: I know that. Is your argument, then, that >>> color is a useless concept because not every color is a primary color? >> >> You're both wrong. >> >> This is not because the eyes of the human species are only receptive >> to three separate wavelength (as well as having seperate wide-spectrum >> receptors that enable to perceive the "luminosity") that this limited >> perception fully reflects the reality of things. > > English isn't your first language is it? Try posting in your native > language, I think I'd have a better chance of understanding you. My lack of command of the english language was probably a part of the problem. One can say a color can always be decomposed into the 3 primary colors when talking about the restricted human perception of color, but not if you consider the nature of light fully. http://www.fact-index.com/c/co/color.html "Electromagnetic radiation is a mixture of radiation of different wavelengths and intensities. When this radiation has a wavelength inside the human visibility range (approximately from 380 nm to 740 nm), that radiation is called light. The light's spectrum records each wavelength's intensity. The full spectrum of the incoming radiation from an object determines the visual appearance of that object, including its perceived color. As we will see, there are many more spectra than color sensations; in fact one may formally define a color to be the class of all those spectra which give rise to the same color sensation." And in fact even if we equate "color" with "human perceived color", the three primary color can only generate the color inside a maxwell triangle that can never cover the full spectral locus (the spectral locus is not a triangle). See this for a complete explanation and illustration : http://www.cs.bham.ac.uk/~mer/colour/cie.html