I think it is more along the lines of ikegami realising that someone wants to be able to solve captchas programmatically, and rather than search for them, OP posts some perl code (that doesn't work) just in case someone will solve all of her problems for him.

I personally think that the word deduce is used inaccurately, however because English is such a versatile language the gist of the question is easily deduced.

This does not take anything away from ikegami's answer, which although Windows specific, is quite helpful for the OP to get things started.