Saturday, October 31, 2009

Getting the colors just right


I described how TV screens and computer monitors don’t show colors exactly the same way. The biggest problem is that some colors in computer graphics simply cannot appear on a TV. These colors are often called illegal or out-of-gamut colors. Although this isn’t a super-serious problem, you should still fix any out of gamut colors in your images before using them in video programs.
Unfortunately, the ability to easily fix out of gamut colors is usually only found in more advanced, expensive video-editing programs. Adobe Photoshop, which retails for about $600, is one such program. To fix the colors in an image, simply open the picture in Photoshop and choose Filter➪ Video➪NTSC Colors. This filter removes all colors from the image that are out of gamut for NTSC TVs. A lower-cost option that also enables you to fix out-of-gamut colors is Photoshop Elements, which is available for a much more affordable price of about $100. You might even be able to get it for free with some digital cameras.
If your image-editing program doesn’t have a video color filter, I wouldn’t lose too much sleep over it. But if it does, fix those out-of-gamut colors so that the image looks better in the final video program.

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