Enhancement of Fingerprint Images using Shape-Adapted Scale-Space Operators
Enhance the fingerprint image. This usually involves a filtering step to suppress noise. The output from this step can be either a better grey-level image or a binary image in which the ridge structure of the original is preserved.
Extract the ridge structure of the fingerprint, i.e., build a graph-like representation of the skeletonized ridges and their incidence relations.
Classify the fingerprint according to its ridge structure at a coarse scale. This reduces the search space, thus speeding up the procedure.
Detect minutiae, i.e. singularities in the ridge structure, such as bifurcations and ridge endings. Then, build a feature vector of the fingerprint.
Store the feature vectors in a database for later use and/or search for fingerprints with matching feature vectors (which will most likely correspond to the same person).
KeywordsIntegration Scale Fingerprint Image Shape Adaptation Scale Selection Ridge Structure
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