A Small Target Auto-orientation Method of Infrared Image with Sea-sky Background

An auto-detection method based on 'cross algorithm' is introduced for infrared image small target(detection.) By utilizing the method on ship infrared search and track system,the algorithm proves to be ability to(detect) the small infrared target rapidly and exactly and with high detection ability.The method includes the following steps.First,an auto detection of sea-sky-line is implemented through Radon transform.Then nearer lines paralleling to sea-sky-line is availed to detect the break point of frequency. At last,the line paralleling to sea-sky-line together with the break point of frequency ascertains the position of IR small target.The algorithm has a high efficiency and can achieve real-time auto-orientation of IR small target.