某型飞机仪表符号提取与叠加方法  

Extraction and Overlaying Method of Meter Symbols for Fighter Plane

作　　者：刘楠[1] 毕笃彦[1] 熊磊[1] 李权合[1] 

机构地区：[1]空军工程大学航空航天工程学院,陕西西安710038

出　　处：《电视技术》2012年第23期25-28,49,共5页Video Engineering

基　　金：国防科技重点实验室基金项目(9140C610301080C6106);国家自然科学基金项目(61175029);航空科学基金项目(20101996009)

摘　　要：针对某型飞机仪表符号矢量信号输出图像存在边缘杂乱、字符断裂、难以直接与飞机外景视频画面叠加的缺陷,提出一种飞机仪表符号提取与叠加算法。首先对仪表画面进行预处理提取感兴趣区域,然后提出结合最小交叉熵的局部阈值法进行分割,继而通过断笔连接和去毛刺使分割出的符号边缘光滑,最后将平滑的二值符号与飞机外景叠加。实验结果表明,该算法能很好地保持仪表符号特征信息,有效改善了原始仪表符号的视觉质量,叠加后能还原外景与仪表真实景象,具有较强的实用性。In view of the defects of edge clutter, character fracture and difficulty in overlaying with sight screens in front ot the alrcratt which result trom limitations of the hardware conditions, a meter symbols extraction and overlaying algorithm is proposed in this paper. First, the meter images are prepro- cessed, and then the proposed method combined with minimum cross-entropy is used to segment the meter symbols. Subsequently, the restoring lossy characters and wiping off burrs algorithms are applied to smooth the symbol vein edges, and ultimately the obtained binary symbols are employed to make overlaying. Experiment results show that the proposed algorithm enjoys a good performance in the video overlaying, improves the visual quality of original meter symbols, and the superimposed video can restore the real scene and has a fine applicability.

关 键 词：仪表符号 图像分割 OTSU法 局部阈值 最小交叉熵 视频叠加 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]