Question: 3. What is the ridge frequency map? Describe its function and how it is derived. What information do we use to compute the ridge frequency

3. What is the ridge frequency map? Describe its function and how it is derived. What information do we use to compute the ridge frequency map in fingerprint recognition? Is it possible to use information from the template database to derive a valid ridge frequency map? What is the difference between the use of the ridge frequency map, ridge contours, and minutiae?

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