I don't know of any published algorithm, but off the top of my head,
I can think of two things.
Lets say the color you get it rgb(x,y,z) from IM where x,y,z are in
the range 0-255 or 0-100%
1) you could make your text color the complement by replacing
x->255-x, y->255-y, z->255-z
or likewise in percent.
or
2) you could take the color as a small swatch image and use -modulate
100,100,0 to rotate the hue by 180 degrees to get the complement
color, then get its rgb values.
for example:
convert -size 1x1 xc:"rgb(79,148,205)" -modulate 100,100,0 -format
"%[pixel:p{0,0}]" info:
returns
rgb(205,136,79)
and
convert -size 1x1 xc:"rgb(31%,58%,80%)" -modulate 100,100,0 -format
"%[pixel:p{0,0}]" info:
returns:
rgb(80%,53.0007%,31.0002%)
Hello
I was wondering if anyone knows how to calculate a legible font-color,
once I've determined the mean color of the image (for a title bar).
I've experimented a bit with calculating the font color (white/black) for
when the title bar color is nearest a color in the 216 'safe' HTML color
table. But the result, though workable, to a degree, still leaves to be
desired, in that sometimes I really think the font color should be white
instead of black, and vice versa.
So, is there perhaps an algorithm out there I'm unaware of? Or a refined
lookup table of some sort.
_______________________________________________
Magick-users mailing list
[email protected]
http://studio.imagemagick.org/mailman/listinfo/magick-users
