Technical advice needed: Visual confirmation on web forms
I need a little bit of advice on a Captcha (visual confirmation) solution which I created for my comment form on my CMS. I'm currently using random number in an image with random noise in the form of pixels. I'm also randomizing the background colour and the text colour each time the image is generated. However, the text itself is plain without distortions.
My question is how easily will OCR bots figure out this captcha? It seems a little weak since the text itself is not distorted. I'm not sure how to achieve such an effect, to be quite honest.
Any advice in the right direction will be of great help. By the way, I looked around google and found a couple of interesting captcha scripts, but I would prefer to use my own code if possible.