Singular point detection is an important task in many Automatic Fingerprint Identification Systems (AFIS). There already exists many singular point detection algorithms, Most of them can efficiently detect the core point when the image quality is fine, but when the image quality is poor; the efficient of the algorithm degrades rapidly. In this paper; we present a new singular point detecting algorithm based on Multi-Resolution Direction Field (DF). First we use the low resolution DF to find an area that includes singular point, then we use high resolution direction field to search the precise position of the singular point. Experiment results show that the detection precise is rather high, even with a poor quality image.
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