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From: hammock@mars.jpl.nasa.gov (Randy Hammock)
Newsgroups: comp.sys.amiga
Subject: Re: Color Bleeding in Video Titles
Message-ID: <2096@jato.Jpl.Nasa.Gov>
Date: 7 Nov 89 01:27:52 GMT
References: <735@orange9.qtp.ufl.edu> <745@tardis.Tymnet.COM>
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Reply-To: hammock@mars.UUCP (Randy Hammock)
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Organization: Jet Propulsion Laboratory, Pasadena, CA.
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>>	PROBLEM #2: I created a variety of title pages, changing font style,
>>		    color, and size. For white letters on black background,
>>		    the result is okay. BUT, for red letters on a black
>>		    background, I get SEVERE bleeding of the colors.

As many people have stated, RED and BLUE are hard to reproduce under NTSC
(Never Twice Same Color).  Something else that must be concidered is the
saturation or level of the color.  At no time should you allow the any one
color to exceed 12 on a scale of 0 to 15 when setting the color levels.
Also, youe should not let the color level be set lower than 1.  This kind
of cuts down on the number of colors that can be displayed but keeps the
color signals within the normal limits of the NTSC signal levels.  I don't
remember the values completely but, a color level should not exceed about
70% of the video level and should not be less than about 1%.  It has been
15 years since I played in a studio so I don't rememr the values exactly.

Randy Hammock

AMIGA /// |   randy@jato.jpl.nasa.gov  Telos - Jet Propulsion Laboratory - NASA
     ///  | hammock@mars.jpl.nasa.gov     ** GALILEO launch October 1989 **
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  \XX/    | "If I wanted your opinions, I'd have given them to you!" - Mock