Script or Module to recreate underlying data from a graph/chart image

whakka has asked for the wisdom of the Perl Monks concerning the following question:

Is there any way to take an image of a graph (example - external link) and store the (x,y) positions of the color contrasts to recreate the underlying data? I apologize if this is a silly question but I appreciate any input.

Comment on Script or Module to recreate underlying data from a graph/chart image

Replies are listed 'Best First'.
Re: Script or Module to recreate underlying data from a graph/chart image by Corion (Patriarch) on Jan 11, 2008 at 17:12 UTC
The Imager module has the `->getpixel()` method which can read the colour value at a location in an image. I guess that all the other imaging modules (Image::Magick, GD,...) also have comparable routines, but I don't know them.	[reply] [d/l]
Re^2: Script or Module to recreate underlying data from a graph/chart image by whakka (Hermit) on Jan 11, 2008 at 17:25 UTC
Thanks Corion, this looks exactly like what I would need.	[reply]