De-obfuscate a picture with statistical information?

Question

I need to get this kind of information into numbers, how?

Perhaps related

1. https://dsp.stackexchange.com/questions/1054/how-do-i-recover-the-signal-from-an-ecg-image

2. https://dsp.stackexchange.com/questions/1080/find-a-specific-line-in-a-picture

3. R's biOps here as a generic tool. R's PET has Hough transform here (but may not work in this domain but HT does not seem too complicated, here)

Answer 1

There's the Haskell explore package meant to do that:

Very first prototype of a command line tool to extract pixel positions matching a given colour to help reconstruct plot data.

(Also see its homepage. I've never used this, though.)