I maintain my own web site, Resonator Software. While writing a HTML page, I wanted to use my black background logo as a background for this page, but I wanted a white version. The logo is here: http://www.ResonatorSoft.com/colorwave.jpg Normally, a simple inverse would work fine if you weren't worried about the colors, but I wanted to retain the same colors. Therefore, the best solution is to split the picture into HSL, invert the luminance, and combine them back together. There's where I run into my first problem: there is no HSL option on the (de)compose dialog. There's a HSV, but value is very difference from luminance. I'd like a HSL option. The luminance seems relatively easy, given the standard RGB to greyscale formula. (Then again, perhaps it's slightly different. I know that Paint Shop Pro does it right.) Fine, so I spend ten minutes loading up my damn Windoze partition and fire up PSP. I split the image, invert the luminance, and recombine. That's the second problem: not enough detail on the HSL images. See, hue relies on a 360-degree color wheel, but a 8-bit greyscale only goes up to 255. If the greyscale was 16-bit, hue would have plenty of room to fractionalize in. There could be other uses for 16-bit greyscale in the future (Ted Turner style recolorization of greyscale images?), but that's one definate use for it right now. -- Brendan Byrd AKA SineSwiper (SineSwiper@xxxxxxxxxxxxxxxxx) Computer techie, PERL hacker, and all-purpose Internet guru Resonator Software (http://www.ResonatorSoft.com/)
