Retrieve Captcha image details

[pweller]

Is there a way to get some details from the captcha image?
For example the width and height?

I have a registration form where sometimes the captcha image is not found and instead another image is selected but it's not the captcha image.

If I could find out the details about the image I could prevent the wrong detection.

 

[step85]

Do a search on the attribute of part links to captcha (regexp)