diff options
| -rw-r--r-- | Tools/pynche/ColorDB.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Tools/pynche/ColorDB.py b/Tools/pynche/ColorDB.py index fae0a3b..a4c8342 100644 --- a/Tools/pynche/ColorDB.py +++ b/Tools/pynche/ColorDB.py @@ -174,6 +174,15 @@ def triplet_to_fractional_rgb(rgbtuple): return map(operator.__div__, rgbtuple, _maxtuple) +def triplet_to_brightness(rgbtuple): + # return the brightness (grey level) along the scale 0.0==black to + # 1.0==white + r = 0.299 + g = 0.587 + b = 0.114 + return r*rgbtuple[0] + g*rgbtuple[1] + b*rgbtuple[2] + + if __name__ == '__main__': import string |