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航空影像上线状地物的半自动提取

DOI: 10.11834/jig.20020233

Keywords: 线状地物,半自动提取,最小二乘匹配,自适应模板,航空影象,上线特征,数字摄影测量系统,图像处理

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Abstract:

提出了一种顾及操作性、稳定性、精度和速度的从航空影象半自动撮线状地物的策略和算法。在人工依次输入的每两个初始点之间,提取连续的抛物线。该方法先通过二模板快速相关和优化计算得到剔除了错误匹配后的初始抛物线参数,然后以其为初值,基于整体最小二乘法模板匹配,解求参数的精确值,以获得更高的定位精度。通过自适应的模板克服了线特征的对比度和线宽度的变化对定位带来的影响。实验结果表明,该算法有较强的抗干扰能力和较高的精度,有较好的实用价值。

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