An Improved Detection Method of The Infrared Small Target

The detection technique for infrared small targets is a key part of an infrared searching and tracking(IRST) system or an infrared surveillance system.The conventional methods are too sensitive to salt and pepper noise and the highlight edges of the background.The geometry and grey level characteristics of infrared small targets in sky background were researched.A new method of detecting infrared small targets was proposed based on multi-degree and orientation gradient.The simulation experiment results show the method could restrain the salt and pepper noise and the highlight edges of the background.The high detection rate and a low false alarm rate are obtained.This method also could be implemented in FPGA to satisfy the real-time requirement.