Research On Detection And Tracking For Small Dim Targets In Infrared Images

With the rapid development of IR imaging and its widest prospect in military application, the IR image processing technology has been the research hotspot in relative professional field. Infrared small dim moving target detection technology, one of the key techniques of infrared imaging system, adopts imaging processing algorithm whose performance is critical for action distance and intelligence of infrared imaging system, to detect target automatically which is under random background and heavy noise. In this paper, we studied on the IR guidance essential features and the limitation in the technology of detection and track for the IR small dim targets, and has got certain achievement. The main work as follows:1. Combine to the principle of heat radiation, we studied and summed on characteristic of the small dim targets in array IR image based on the mathematic model of the array IR image systematically. And union the IR detector nature, have been in progress to noise characteristic in IR array image studying and summing up.2. To infrared image, the pretreatment and background restrain a technology having been in progress studying. And aimed at poor precision of the traditional infrared image segmentation and the poor real time application of the Level Set method that is only based on boundary information or area information .A new Level Set method, based on boundary information and area information simultaneity ,used for infrared image segmentation was proposed . The boundary information and area information are combined excellently by using adaptive coefficient T1 and T2, and at the same time, the precision of image segmentation is guaranteed and the time-consuming is also reduced .The simulation results and comparison with other methods show that this method can segment the infrared image not only accurately but also practically.3. Have been in progress to target detecting in the past small and weak technology recollecting and summing up. And based on the analysis of the targets and background in IR image .An method of small dim targets detection based on fusion of the mark information and gradient information was proposed . In IR image space, according to targets' characteristic, dual-window was used to search and mark possible targets .Calculate the gradient of originality IR image simultaneously.