在特征表示方面，用形状签名代替链码来描述轮廓，从而提高了计算速度，降低了由噪声干扰和镜头形变造成的影响。
The chain code was replaced by the shape signature and used to express the contour, improve the speed and decrease the effect of noise and transformation due to camera calibration.
仿真测试结果表明，此方法使得匹配跟踪的时间大约降低为原来的10%，提高了整个跟踪算法的计算速度，对星敏感器整体效能的提高也非常明显。
The simulation results show that the matching time is reduced to 10% of the past method, the speed of tracking is improved and the whole efficiency of star sensor is also improved obviously.
当显示图形的时候，计算速度降低了。
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