- From: Alan Gresley <alan@css-class.com>
- Date: Sun, 02 Oct 2011 08:27:36 +1100
- To: "Tab Atkins Jr." <jackalmage@gmail.com>
- CC: Brian Manthos <brianman@microsoft.com>, "L. David Baron" <dbaron@dbaron.org>, "www-style@w3.org" <www-style@w3.org>
On 2/10/2011 1:21 AM, Tab Atkins Jr. wrote: > On Sat, Oct 1, 2011 at 4:55 AM, Alan Gresley<alan@css-class.com> wrote: >> There is not premultiplied and non-premultiplied spaces. >> >> There is only premultiplied and non-premultiplied traversal (paths) of sRGB >> colorspace (with full opacity). A gradient from yellow to blue has a >> midpoint of gray (#797979). > > Incorrect. Incorrect in which way? 1. A gradient from yellow to blue has a midpoint of gray (#797979). 2. premultiplied gradients do not transverse colorspace but only change in an alpha plane that is extrapolated out from sRGB colorspace. >>> sRGB >>> vs linearRGB is a completely different story. >> >> I would like to know what linearRGB is? Should I go off searching. > > Going searching would be a good first step. It has to do with gamma > correction. There are plenty of decent sites talking about the issue. > > ~TJ Perhaps here, http://en.wikipedia.org/wiki/SRGB#The_sRGB_gamut and here. http://en.wikipedia.org/wiki/SRGB#Specification_of_the_transformation Which transforms a 3D space into 2D representation. http://en.wikipedia.org/wiki/CIE_1931_color_space#The_CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space | Based on the work of MacAdam, the CIE 1960, CIE 1964, | and CIE 1976 color spaces were developed, with the | goal of achieving perceptual uniformity (have an | equal distance in the color space correspond to | equal differences in color). Although they were | a distinct improvement over the CIE 1931 system, | *they were not completely free of distortion*. There is a distortion since it is 2 dimensional representation of something that is 3 dimensional. It's only after seeing something in 3D that you truly understand that Lightness itself (as in HSL) is orientated on a difference axis to the Hue and Saturation components of sRGB colorspace (view in WebKit). http://css-class.com/test/css/colors/color-cube-grayscale.htm -- Alan Gresley http://css-3d.org/ http://css-class.com/
Received on Saturday, 1 October 2011 21:28:10 UTC