Help solving PNG based captcha (Not SVG, but PNG)

[dansp89]

[skotz]

The images you provided are PNGs. If the CAPTCHA is truly an SVG (which is essentially a text file) then you might be able to simply parse out the shapes that way without any image operations at all. I've even seen some CAPTCHAs label the shapes with the name of the letter or not combine shapes like the lines with the letters. SVG is probably the worst possible image format for making a secure CAPTCHA, but without examples of the SVG itself I can't really help.