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| author | Guido van Rossum <guido@python.org> | 1991-11-22 14:06:10 (GMT) |
|---|---|---|
| committer | Guido van Rossum <guido@python.org> | 1991-11-22 14:06:10 (GMT) |
| commit | 01ebbb80ab9a4cdbc8acaa646b2f7a1b234215fc (patch) | |
| tree | bbcb2f242f622a8a36acc6f8c337ad7b4a27b7b5 | |
| parent | a63f19798d364718d5975a4fd6234ed9272948cd (diff) | |
| download | cpython-01ebbb80ab9a4cdbc8acaa646b2f7a1b234215fc.zip cpython-01ebbb80ab9a4cdbc8acaa646b2f7a1b234215fc.tar.gz cpython-01ebbb80ab9a4cdbc8acaa646b2f7a1b234215fc.tar.bz2 | |
Initial revision
| -rwxr-xr-x | Demo/sgi/video/colorsys.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Demo/sgi/video/colorsys.py b/Demo/sgi/video/colorsys.py new file mode 100755 index 0000000..872b533 --- /dev/null +++ b/Demo/sgi/video/colorsys.py @@ -0,0 +1,20 @@ +# +# Module color - do color conversions +# + +def rgb_to_yiq(r,g,b): + y = 0.30*r + 0.59*g + 0.11*b + i = 0.60*r - 0.28*g - 0.32*b + q = 0.21*r - 0.52*g + 0.31*b + return (y,i,q) +def yiq_to_rgb(y,i,q): + r = y + 0.948262*i + 0.624013*q + g = y - 0.276066*i - 0.639810*q + b = y - 1.105450*i + 1.729860*q + if r < 0.0: r = 0.0 + if g < 0.0: g = 0.0 + if b < 0.0: b = 0.0 + if r > 1.0: r = 1.0 + if g > 1.0: g = 1.0 + if b > 1.0: b = 1.0 + return (r,g,b) |