Scott Watson (scott++at++disney.com)
Mon, 3 Mar 1997 21:30:44 -0800
Rimi> Y.Kanou wrote:
>> Is there a fast way to display monochrome images rather than
>> color images?
>>
>> I know intensity(Y) is calculated by Y=0.3*R+0.59*G+0.11*B. But
>> I think this needs pixel-level calculation and costs much.
>>
>> I would like to find a more efficient way if any.
>>
>> Thanks in advance.
>>
Rimi> The easiest way is to add a small pasive electronic device
Rimi> that does the above signal merging from the R,G,B
Rimi> signal. Some displays directly have this capability (like the
Rimi> color tunning on your TV)
Rimi> Sometime a little of electronic is better than lot of
Rimi> software !
True - I had to do this once before. I hacked the loader to do the:
R' = G' = B' = Y where Y=0.3*R+0.59*G+0.11*B (from above)
For colored polygons, etc. Textures where handled with a simple
pre-processes using ppmtopgm.
Depending on your database you may be able to get by with just
processing the textures.
--
Scott Watson -- ..and God typed "M-x light" and there was light.
"conventional orthography is ... a near optimal system for the
lexical representation of English words." Chomsky & Halle, S.P.E.
=======================================================================
List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
Submissions: info-performer++at++sgi.com
Admin. requests: info-performer-request++at++sgi.com
This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:54:50 PDT