A Method of Mismatching Points Elimination of Non-collinear Multiple CCDs Remote Sensing Images Based on Clustering Algorithm
Funds:
The National Nature Science Foundation of China (41001214)
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摘要: 針對非共線多CCD遙感圖像匹配點的分布特點,該文提出一種基于聚類的誤匹配點去除方法。 首先,根據(jù)匹配點的沿軌方向偏移量曲線,獲取匹配點的多維特征向量。然后,對匹配點集進行聚類處理,將所有點聚為一個類簇,最后根據(jù)簇半徑序列曲線的變化趨勢區(qū)分正確點和誤匹配點。通過天繪1號02星全色遙感圖像的實驗和處理,結(jié)果表明在誤匹配點去除和正確匹配點保留方面所提算法與其它方法相比具有更好性能。Abstract: Considering the distribution characteristic of the matching points of non-collinear multiple Charge- Coupled Device (CCD) remote sensing images, a new method based on clustering to eliminate the mismatching points is proposed. First, the multi-dimensionality feature vector of matching points is obtained on the basis of the disparity curve in along-track direction. Second, all points are clustered to one cluster. Finally, the points are marked off according to the variation trend of the semi-diameter of the cluster. The experiment results running on the panchromatic image of mapping satellite 1-02 show that the method has better performance on eliminating the mismatched points and keeping the matched points.
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Key words:
- Remote sensing images /
- Non-collinear /
- Charge-Coupled Device (CCD) /
- Mismatching points /
- Clustering
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