How to get only the captcha

How i can do to get only the captcha (image verification code)
i will make a program to filter and derotate image to use with GOCR but
i dont know to get only the captcha ... sro make a temp file for captcha ?

I accept ideas !!

its like inviciblenoob told you, its in the memory, stop asking pls!

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You want to make a anti-captcha tool without knowing how to get the image code picture?

#closed