On Tue, Aug 10, 2010 at 5:00 PM, Raul Miller <[email protected]> wrote: > So... I use gethttp to retrieve a png image which I want to manipulate in J. > > png=:gethttp'http://rosettacode.org/mw/images/c/c6/Pentagon.png' > > What is the simplest way to convert that raw data to an array of pixel > values?
The simplest way is using imagemagick. Try this: img=: 240 320 $ a.i. 2!:0 'curl "http://rosettacode.org/mw/images/c/c6/Pentagon.png"; | convert - gray:-' '.@'{~ (<(+/%#)@:,) _10+/\"1] _10+/\ img Ambrus ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
![http://rosettacode.org/mw/images/c/c6/Pentagon.png"](http://rosettacode.org/mw/images/c/c6/Pentagon.png"){kind=link}