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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing. >Coarse-to-Fine Extraction of Small-Scale Lunar Impact Craters From the CCD Images of the Chang’E Lunar Orbiters
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Coarse-to-Fine Extraction of Small-Scale Lunar Impact Craters From the CCD Images of the Chang’E Lunar Orbiters

机译：从the娥娥号月球轨道器的CCD图像中粗略地提取小型月球撞击坑

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摘要

Lunar impact craters form the basis for lunar geological stratigraphy, and small-scale craters further enrich the basic statistical data for the estimation of local geological ages. Thus, the extraction of lunar impact craters is an important branch of modern planetary studies. However, few studies have reported on the extraction of small-scale craters. Therefore, this paper proposes a coarse-to-fine resolution method to automatically extract small-scale impact craters from charge-coupled device (CCD) images using histogram of oriented gradient (HOG) features and a support vector machine (SVM) classifier. First, large-scale craters are extracted as samples from the Chang’E-1 images with spatial resolutions of 120 m. The SVM classifier is then employed to establish the criteria for classifying craters and noncraters from the HOG features of the extracted samples. The criteria are then used to extract small-scale craters from higher resolution Chang’E-2 CCD images with spatial resolutions of 1.4, 7, and 50 m. The sample database is updated with the newly extracted small-scale craters for the purpose of the progressive optimization of the extraction. The proposed method is tested on both simulated images and multiple resolutions of real CCD images acquired by the Chang’E orbiters and provides high accuracy results in the extraction of the small-scale impact craters, the smallest of which is 20 m.
机译：月球撞击坑形成了月球地质地层学的基础，而小规模的陨石坑进一步丰富了用于估算当地地质年龄的基本统计数据。因此，提取月球撞击坑是现代行星研究的重要分支。但是，很少有研究报道小规模陨石坑的开采。因此，本文提出了一种从粗到细分辨率的方法，该方法使用定向梯度（HOG）特征直方图和支持向量机（SVM）分类器从电荷耦合器件（CCD）图像中自动提取小规模撞击坑。首先，从Chang'E-1影像中以120 m的空间分辨率提取大型陨石坑作为样本。然后，使用SVM分类器来建立用于根据提取样本的HOG特征对火山口和非火山口进行分类的标准。然后使用该标准从空间分辨率为1.4、7和50 m的高分辨率Chang'E-2 CCD图像中提取小规模的陨石坑。为了逐步优化提取，将使用新提取的小规模环形坑更新样品数据库。拟议的方法在模拟图像和由Chang'E轨道器获取的真实CCD图像的多分辨率上进行了测试，并且在提取最小规模为20 m的小规模撞击坑中提供了高精度结果。

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