Parsing a graph image

[Laurent Claessens]

> I guess it requires some kind of image processing , where you can move around image pixel
>by pixel and somehow figure out what color is present in that pixel .
> If there isn’t much noise in the image you should sharp contrast and would
>be able to differentiate between two colors ? if yes ( I don’t know matlab
 >might provide some tools ..  just guessing ) then its easy i think to 
pick (X,Y) as time and value ?

You made me think that in addition to ask to imagemagick's and 
matplotlib, one can also as to Sage[1]

In order of pythonicity :
- matplotlib
- sage
- imagemagick's


Laurent

[1] www.sagemath.org

PS : Sorry for having send my previous answer 5 times. I don't understand :(