海天背景下红外小目标检测的背景抑制及海天线检测方法

针对复杂海天背景下红外弱小目标难以检测与识别的问题，提出了基于海天线检测实现远距离弱小目标识别的方法。该方法对采集到的红外图像进行相关处理。通过用多级小波变换方法抑制背景杂波噪声提高目标信杂比；然后使用多方向Gabor滤波融合方法增强海天线边缘，并通过霍夫变换方法实现海天线定位和检测；最后通过定位海天线确定海天线附近区域的目标搜寻范围，缩小目标点潜在区，从而提高弱小目标在海天背景下的检测和识别概率。

Background Suppression and Sea-sky Line Detection Method for Small Infrared Target Detection in Background of Sea and Sky

It is difficult to detect and recognize dim and small infrared targets in the complicated sea-sky background. To solve this problem, a remote small target recognition method based on sea-sky line detection is proposed. In the method, the correlation processing is performed on the infrared images collected. To improve the signal-to-clutter ratio of the target, the background clutter noise is suppressed through multi-level wavelet transform. Then, a multi-direction Gabor filtering fusion method is used to enhance the edge of the sea-sky line and the sea-sky line is positioned and detected through Hough transform. Finally, by positioning the sea-sky-line, the target search area near the sea-sky line is determined, the potential area of the target is narrowed and hence the detection and recognition probability of the dim and small target in the background of sea and sky is improved.