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- Newsgroups: comp.graphics
- Path: sparky!uunet!wupost!usc!cs.utexas.edu!sun-barr!ames!kronos.arc.nasa.gov!iscnvx!togata
- From: togata@iscnvx.lmsc.lockheed.com (Thomas V. Ogata)
- Subject: Re: Image negative to positive algorithm
- Message-ID: <1992Sep4.143236.22301@iscnvx.lmsc.lockheed.com>
- Organization: Lockheed Missiles and Space Co.
- X-Newsreader: Tin 1.1 PL4
- References: <1992Sep4.055055.12202@monu6.cc.monash.edu.au>
- Date: Fri, 4 Sep 92 14:32:36 GMT
- Lines: 32
-
- steve@monu6.cc.monash.edu.au (Steve Balogh (+61 3 565 4747)) writes:
- : In article <1992Sep1.093533.3554@mits.com.au> alistair@mits.com.au writes:
- : >In article <1992Aug28.143906.3553@mits.com.au>,
- : >
- : >Grey-scale images may be converted using:
- : >
- : > <new pixel value> = <white pixel value> - <old pixel value>
- : >
- :
- : Can you therefore imply that:
- :
- : <new RED pixel value> = <Full RED pixel value> - <old RED pixel value>
- : <new GREEN pixel value> = <Full GREEN pixel value> - <old GREEN pixel value>
- : <new BLUE pixel value> = <Full BLUE pixel value> - <old BLUE pixel value>
- :
- : Or is this too simplistic? :)
- :
-
- Couldn't one use a red, green, then blue filter on the negative, apply the
- above to each image and then re-merge the image ?
-
- Or is this the wrong track also ?
-
- -------------------------------------------------------------------------
- !Tom Ogata Lockheed Missiles and Space Co., Inc. !
- !togata@lmsc.lockheed.com P.O.Box 3504 !
- !(408)743-2878 B/551 O/77-10 !
- ! Sunnyvale, CA 94088-3504 !
- ! !
- ! (If you think this signature is boring, !
- ! you should listen to my answering machine.) !
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