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colour video

color reproduction and display is different in between TV and computer, because computer monitor uses RGB component video i;e color is split into red, green and blue signals which are purer and more accurate than those scanned on TV monitor. *consequently the color used in graphics image created for computer video may display differently when the images transferred into NTSC transmission video. *indeed NTSC TV uses limited color palettes and restricted luminance(brightness levels and black levels). *some colors are generated by the computer that display fine color on RGB.the monitor may be illegal for display on NTSC TV broadcast. *most commercial broadcast facility and TV studios refuse to run programs that include illegal colors. *filters to convert illegal colors to legal colors are available in video and image editing processing application. the TV systems are designed to do particularly well on skin tones, not on hydrodynamical simulation. *very bright colors will vibrate distractingly. *one should use colors at 80% saturation or less for color video. *humans are better at distinguishing shades of green than at the colors on the end of visual spectrum. *greenish color do reasonable well on video because that is another color, the TV systems are designed for reproducing well. *yellow is also good color for humans, but to use it in video one should lower the saturation. *difference in brightness are more easily distinguished in video, than in difference in hue (color). *in displaying lines or areas of abrupt color difference, there should be at least 5 pixel width per color to avoid "CHROMA CRAWL". (an effect where the line seems to creep alone at color boundaries). *blue makes a better background for video than black. *one can do better with light color text on ones' dark color background than the reverse.
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