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| author | Barry Warsaw <barry@python.org> | 1998-09-28 23:39:18 (GMT) |
|---|---|---|
| committer | Barry Warsaw <barry@python.org> | 1998-09-28 23:39:18 (GMT) |
| commit | 0e3e6991787f869a684066bc54c58f29cd7f1c9f (patch) | |
| tree | fd2a8cad80678e737628e322d68dd5f45ecc42ba /Tools/pynche | |
| parent | a69c1ba0aaa4c02a1c14c6f5ce0833cb493c9bfa (diff) | |
| download | cpython-0e3e6991787f869a684066bc54c58f29cd7f1c9f.zip cpython-0e3e6991787f869a684066bc54c58f29cd7f1c9f.tar.gz cpython-0e3e6991787f869a684066bc54c58f29cd7f1c9f.tar.bz2 | |
triplet_to_brightness(): New function
Diffstat (limited to 'Tools/pynche')
| -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 |