采取对基准图卫片中特征进行亚像元精度特征定位的方法，可以将匹配精度提高到1／3个像素以内。
The location precision is improved to 1/3 pixel by performing sub - pixel edge detection in fiducial satellite photo image.
通过对基准图相关曲面特征与匹配性能参数之间的关系分析，建立了一种综合的评价准则，对不同的特征进行综合的评价。
Analyzing the relationship between the feature of reference-image correlation plane and matching capability, a synthetic rule is established to evaluate different feature.
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