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Examination of Downsampling Strategies for Converting 1000 ppi Fingerprint Imagery to 500 ppi

Examination of Downsampling Strategies for Converting 1000 ppi Fingerprint Imagery to 500 ppi

Paperback

General Reference

ISBN10: 1499734964
ISBN13: 9781499734966
Publisher: Createspace
Published: Jul 23 2014
Pages: 86
Weight: 0.49
Height: 0.18 Width: 8.50 Depth: 11.00
Language: English
The Federal Bureau of Investigation (FBI) is increasing the sample rate at which it acquires and stores fingerprint imagery, and to accommodate the higher sample rate is replacing Wavelet Scalar Quantization (WSQ) with JPEG2000 as its standard compression algorithm. Currently the bulk of fingerprint data in operations is captured, processed and stored at 500 ppi (pixels per inch) using the WSQ compressed digital format. With the transition to 1000 ppi, some systems will unavoidably contain an overlap between 500 ppi and 1000 ppi operational pathways.

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