该算法利用差分求导的方法求得指纹的曲率场，并按照一定的规则搜索参考点。
The curvature image of fingerprint was calculated by using difference derivation, and the core point was searched complying with certain rules.
通过对原串行程序进行分析与测试，确定了以曲率计算、第一次差分计算和第二次差分计算等为并行化的重点。
Through the analysis and test of original serial program system, curvature computing and first difference, second difference etc. are defined as key objects.
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