Abstract:

Based on the seaport remote sensing images at different time in the same place, a new method is proposed for ship targets change detection in ROI of the seaport. This method detects and recognizes the ship targets in seaport first, then compares the location change of ship targets, and finally gives the quantitative analysis result. Also, an algorithm is developed for targets distance calculation in which the latitude and longitude information are used to get the distance change of targets. As a result, the affection of disturbing factors caused by environment-different or time-different images are eliminated. Meanwhile, in the present method, the ship targets distance and length are integrated into one parameter, so that the change analysis of ship targets is simplified.

Key words: Change detection, Ship recognition, Distance calculation by latitude and longitude

摘要： 基于同一地区不同时相港区遥感图像，在图像感兴趣区域(ROI)目标检测的基础上，研究了一种港区舰船目标变化检测新方法。该方法检测和识别港区舰船目标，比较目标位置变化后，给出了定量分析结果。提出了一种用经纬度计算目标距离的算法，可以克服多幅图像摄取环境、摄取时差等干扰因素的影响；将舰船距离和舰船斜边2个参数综合成斜距，简化舰船目标的变化分析。

关键词: 变化检测, 舰船识别, 经纬度求距离