Full On Design » CAPTCHA. Image Orientation http://www.fullondesign.co.uk Design & Web Technologies Sun, 30 Oct 2011 21:37:16 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 CAPTCHA Based On Image Orientation http://www.fullondesign.co.uk/coding/938-captcha-based-on-image-orientation.htm http://www.fullondesign.co.uk/coding/938-captcha-based-on-image-orientation.htm#comments Fri, 05 Jun 2009 17:38:15 +0000 Rogem http://www.fullondesign.co.uk/?p=938 A few months ago 3 Google employees explored an innovative approach to CAPTCHA (What’s Up CAPTCHA? A CAPTCHA Based On Image Orientation). Essentially they suggested that having a user orientate an image into its upright position is easier for users (typing difficult to read text can be problematic) and harder for computers.

Computers find it hard to figure out what this is
A computer finds it really difficult to know if this is correctly orientated.

Here is a version I wrote which to can use on your website.

View Demo Download

This script makes use of jQuery to allow the user to rotate the images and a little PHP to check the image was rotated into the correct position.

]]> http://www.fullondesign.co.uk/coding/938-captcha-based-on-image-orientation.htm/feed 0