ZelluX wrote:
> Convert RGB colors to the closest ANSI colors. For example, given RGB
> color FF0000, it should print [31m.
from functools import partial
def to_rgb(color):
return (color >> 16) & 0xFF, (color >> 8) & 0xFF, color & 0xFF
target_colors = {
0x000000: "\33[30m",
0xFF0000: "\33[31m",
# ...
0xFFFFFF: "\33[37m",}
def euclidian(c1, c2):
r, g, b = to_rgb(c1)
s, h, c = to_rgb(c2)
r -= s
g -= h
b -= c
return r*r+g*g+b*b
def closest_color(color, target_colors=target_colors, dist=euclidian):
return min(target_colors, key=partial(dist, color))
if __name__ == "__main__":
black = target_colors[0]
for color in 0xff0000, 0x00ff00, 0x808080, 0x008000:
bestmatch = closest_color(color)
code = target_colors[bestmatch]
print "#%06x --> %sSAMPLE%s" % (color, code, black)
If the results are not good enough for your application you can convert to
another colorspace before calculating the distance.
Peter
--
http://mail.python.org/mailman/listinfo/python-list
