Re: RGB-Channel-Mixer (Technicolor-Effect)
stefan <[email protected]>
| Newsgroups | gmane.comp.video.mjpeg.devel |
|---|---|
| Message-ID | <[email protected]> |
Roman Shaposhnik schrieb: > Is there any pointer you can give to how one can use such a > RGB-Channel-Mixer to create various effects like the one mentioned ? No, most technical descriptions I have found on the net do such effects differently (mixing chroma planes in some graphic-software... but this essentially is what a channel-mixer does)... e.g. if you check aviator-fx (homepage?) they seem to have this done by extracting chroma-planes (either in rgb, yuv or cmy(k)) and mixing these... which is essentially the same than using a channel-mixer... The technicolor-2-stripe (that term isn't correct, I know ;-) effect can be composed as follows: R = 1.0*R + 0.0*G + 0.0*G G = B = 0.0*R + 0.5*G +0.5*B this was bichromatic-process using only a red (slightly orange???...) and a cyan primary-color-filter recording on BW-film. So true green gets grey... technicolor-3-stripe used three filters (red/green/blue) recording on three stripes of BW-film. This lead to overly saturated colors, as there was nearly no cross-color-response (as on modern film-materials). But well, just increasing the saturation just doesn't look right... cu Stefan ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV