jesoakley@yahoo.co.uk wrote:
> Hi, I like to buy Sudoku magazines (the 'killer' variety with the
> grids inside), scan the puzzles into jpgs, and them print them much
> bigger. The only way I get a decent image is to scan them grayscale,
> which leaves much of the backgrounds grey (surprise surprise). I am
> getting through quite a few ink cartridges printing these things out,
> and thought that even a newby like me ought to be able to use CS3 to
> remove the gray, and leave just the black grid/numbers.
>
> It seems to me that using CS3 for such a mundane task is like using a
> chainsaw to cut down a dandelion; i.e. it is far too powerful a beast,
> because i have tried many different techniques (boosting contrast/
> brightness, painting white etc), but have so far failed to find a
> slick method to do what i want. Given that there are roughly 50
> puzzles per mag, I was hoping for something very simple.
>
> Can anyone out there ?

Scanning them as line art doesn't work?

If not, then Image, Adjustments, Levels and use the left eyedropper to
set your black and use the right eyedropper to set your white.

--
JD..