有色设备

As the non-ferrous enterprises in China accelerate their development of information technology, information security is an important factor that cannot be ignored. CAPTCHA is a reversed Turing test program which could be used to autonomously distinguish between computers and human. A captcha noise reduction recognition algorithm model was designed and implemented, and a common type of CAPTCHAs were identified and analyzed. Studies have shown that for CAPTCHAs with multiple font types are more difficult to identify, thus could be used to improve information security in the non-ferrous industry.