Fastest Way To Loop Through Every Pixel

[Paul McGuire]

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message
news:Grhyg.21879$Cn6.17684 at tornado.texas.rr.com...
> "Chaos" <psnim2000 at gmail.com> wrote in message
> news:1154055002.495073.171650 at i3g2000cwc.googlegroups.com...
> >
> >
> > myCol = (0.3 * image.GetRed(thisX, thisY)) + (0.59 *
> > image.GetGreen(thisX, thisY)) + (0.11 * image.GetBlue(thisX, thisY))
> > if myCol < darkestCol:
> >    darkestCol = myCol
> >    possX = thisX
> >    possY = thisY
> >
>
> Psyco may be of some help to you, especially if you extract out your myCol
> expression into its own function, something like:
>
> def darkness(img,x,y):
>     return  (0.3 * img.GetRed(x,y)) + (0.59 * img.GetGreen(x,y)) + (0.11 *
> img.GetBlue(x,y))
>
<snip>

Even better than my other suggestions might be to write this function, and
then wrap it in a memoizing decorator
(http://wiki.python.org/moin/PythonDecoratorLibrary#head-11870a08b0fa59a8622
201abfac735ea47ffade5) - surely there must be some repeated colors in your
image.

-- Paul