Fastest Way To Loop Through Every Pixel

[Chaos]

Simon Forman wrote:
> Chaos wrote:
> > As my first attempt to loop through every pixel of an image, I used
> >
> >         for thisY in range(0, thisHeight):
> >             for thisX in range(0, thisWidth):
> >                   #Actions here for Pixel thisX, thisY
> >
> > But it takes 450-1000 milliseconds
> >
> > I want speeds less than 10 milliseconds
> >
> > I have tried using SWIG, and pypy but they all are unsuccessfull in
> > compiling my files.
>
> You could try the PIL package.
>
> >From the docs at
> http://www.pythonware.com/library/pil/handbook/image.htm
>
> Image.eval(function, image) => image
>
> Applies the function (which should take one argument) to each pixel in
> the given image. If the image has more than one band, the same function
> is applied to each band. Note that the function is evaluated once for
> each possible pixel value, so you cannot use random components or other
> generators.
>
> HTH,
> ~Simon

I have tried PIL. Not only that, but the Image.eval function had no
success either. I did some tests and I found out that Image.eval only
called the function a certain number of times either 250, or 255.
Unless I can find a working example for this function, its impossible
to use.