Re: [R] Convert RGB-sRBG

2009-06-23 Thread Dieter Menne
Barry Rowlingson wrote: > > "8-bit color" graphics often refers to a situation where each pixel is 8 > bits, and the colour comes from a 256-colour palette lookup table. > If you really have a 8 bit palettized colour lookup, as Barry assumes, you better use one of the build-in conversions, f

Re: [R] Convert RGB-sRBG

2009-06-23 Thread Barry Rowlingson
On Tue, Jun 23, 2009 at 2:26 PM, Dieter Menne wrote: > > > > Paulo Cardoso wrote: > > > > How can I convert from 8-bit RGB color to [0-1] interval (sRGB) and > > vice-versa? > > > > If you have the R/G/B values separately, divide by 255, and use function > rgb > in grDevices. If you have the hex

Re: [R] Convert RGB-sRBG

2009-06-23 Thread Dieter Menne
Paulo Cardoso wrote: > > How can I convert from 8-bit RGB color to [0-1] interval (sRGB) and > vice-versa? > If you have the R/G/B values separately, divide by 255, and use function rgb in grDevices. If you have the hex values, paste these into a string, and use something like col2rgb("#2C3

[R] Convert RGB-sRBG

2009-06-23 Thread Paulo E. Cardoso
Hi, How can I convert from 8-bit RGB color to [0-1] interval (sRGB) and vice-versa? Thanks in advance Paulo E. Cardoso [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/l