Method for searching bridge in IR images

A method for searching bridges in IR images is presented. To recognize targets in low SCR images is a time-exhausting task . As in IR images the bridges usually have almost the same gray level range of the backgrounds. The typical segmentation algorithm cannot get correct segmentation labels and edge sites of the bridges. The gray level characters of both the lands, which connect the bridge, and the river are fully considered resulting in a method that can be realized effortlessly and quickly. The criteria are also presented to decide whether there exist bridges or not in the given images, so the method endows the system with the ability to seize target automatically. Some experimental results are also presented demonstrating that the method can be used effectively for the recognition of bridges in IR images.