The problem of fingerprint scaling has received limited attention in the literature. Fingerprint scaling is an important issue
for fingerprint sensor interoperability. However, no systematic study has been conducted to ascertain its effect on fingerprint
systems. In this paper, a fingerprint scaling scheme using the average inter-ridge distance is presented. At first, the average
inter-ridge distances of two fingerprint images acquired with two different fingerprint sensors are estimated respectively.
Then the images are zoomed according to scale of the two average inter-ridge distances. Experiments have shown that the proposed
fingerprint scaling method has good performance.
Keywords Fingerprint - scaling - sensor interoperability - inter-ridge distance
The work is supported by Shandong Province Science and Technology Development Program under Grant No. 2005GG3201089, Reward
Fund for Outstanding Young and Middle Aged Scientists of Shandong Province under Grant No. 2006BS01008, and Shandong Province
High Technology Independent Innovation Project under Grant No. 2007ZCB01030.