After getting pixel stripes with edge detection algorithm, the high precision strips could be detected by sub-pixel technology.
利用边缘提取算法获得像素级条纹后，再利用亚像素技术可以进一步对条纹进行高精度提取。
Applying the radial section scanning method based on gray centroid, the image edges are tested with a sub-pixel precision.
采用基于灰度质心法的径向截面扫描法对图像边缘进行亚像素级检测；
The location precision is improved to 1/3 pixel by performing sub - pixel edge detection in fiducial satellite photo image.
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。
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