forgot the link:
http://en.wikipedia.org/wiki/Tincture_(heraldry)
here's a quick and approximate mapping in ASCII-art:
rgb en-US xno ASCII
=== ===== ===== =====
··· black sable "##"
"##"
··1 blue bleu (see azure ·½1)
·½1 azure azure "=="
"=="
·1· green vert "\\"
"\\"
·11 cyan bleu (see azure ·½1)
celeste
½½½ grey cendrée "-|"
"|-"
1·· red gules/ "||"
sinople "||"
1½· orange (see red 1··)
1·1 purple purpure "//"
"//"
11· yellow or "::"
"::"
111 white argent " "
" "
in rgb triples · = 0%, ½ = 50%, and 1 = 100%
NOTE: blue ··1 cyan ·11 are not distinguished from from azure ·½1
NOTE: orange 1½· is not distinguished from red 1··
NOTE: xno is ISO 639-3 for "Anglo-Norman"
On Mon, 2006-10-16 at 13:07 -0700, Benjamin C. Wiley Sittler wrote:
> why not support the classic engraving marks? that way cellphone + old
> book/reproduction = color engraving.
>
> On Mon, 2006-10-16 at 14:40 -0400, Kragen Javier Sitaker wrote:
> > On Mon, 16 Oct 2006 12:17:50 +0200, Dave Long wrote:
> > > > It would be cool to print out a black-and-white image on, say, a laser
> > > > printer, which contained an unobtrusive embedded "watermark" or
> > > > "barcode" that contained chroma information for the image --- rather
> > > > like what the Apple II did to get NTSC color just by producing a
> > > > pattern of 1's and 0's.
> > >
> > > Come to think of it, the Apple II scheme turns a well known broadcast
> > > bug (there are dress codes for on-air appearances, as houndstooth and
> > > similar high-frequency fabrics alias into color) into a feature. I
> > > wonder how much the use of gradients in web graphics is due to
> > > recent-featurism, and how much is in imitation of broadcast graphics,
> > > which have to have smooth gradients -- they'd bleed if one tried to
> > > make a crisp transition.
> >
> > That's an interesting question. My preferred hypothesis is that it's
> > the age of calm technology --- one of the disadvantages of the Apple
> > ][ scheme was that it could only produce bright, garish colors with
> > sharp boundaries between them, and gradients are much more soothing.
> >
> > > > Then you could point, say, a cellphone camera at the image, and push a
> > > > button, and see the image in color.
> > >
> > > Unfortunately (fortunately?) the information between a cellphone camera
> > > and a printout isn't mediated by NTSC, but by regular photons, so it
> > > seems unlikely this would work.
> >
> > I didn't mean it would work by accident --- I meant that software in
> > the cellphone could decode a chroma signal from a barcode "hidden" in
> > the image, for example in the angle and spacing of patterns of
> > parallel lines used to approximate a grayscale as in an engraving.
> >
> > Venezuelan paper money has areas that appear from a distance to be one
> > solid color, but consist of many areas of fine parallel lines at
> > different angles. Presumably the idea is that each area would appear
> > a different brightness by raster aliasing if scanned with a
> > poor-quality scanner, or printed with a poor-quality printer.
> >
> > But the same scheme could be applied to encode more interesting
> > information subliminally into the print; perhaps the frequency of the
> > lines could represent saturation, and their angle could represent hue.
> >
> >
