iso 19794-2 fingerprint format

Question

I am using iso 19794-2 fingerprint data format. All the data are in the iso 19794-2 format. I have more than hundred thousand fingerprints. I wish to make efficient search t

Answer 1

The iso format specifies useful mechanisms for matching and decision parameters. Decide on what mechanism you wish to employ to identify the match, and the relevant decision parameters. When you have determined these mechanisms and decision parameters, examine them to see which are capable of being put into an order - with a fairly high degree of individual values, as you want to avoid multiple collisions on the data. When you have identified a small number of data items (preferably one) that have this property, calculate the property for each fingerprint - preferably as they are added to the database, though a bulk load can be done initially. Then the search for a match is done on the calculated characteristic, and can be done by a binary tree, a black-red tree, or a variety of other search processes. I cannot recommend a particular search strategy without knowing what form and degree of differentiation of values you have in your database. Such a search strategy should, however, be capable of delivering a (small) range of possible matches - which can then be tested individually against your match mechanism and parameters, before deciding on a specific match.