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usnistgov / NFIQ2

Optical live-scan and ink fingerprint image quality assessment tool
https://www.nist.gov/services-resources/software/development-nfiq-20
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NFIQ2 for minutiae cropped patches #349

Closed gowrijsuria closed 1 year ago

gowrijsuria commented 1 year ago

Hi, I tried to run Nfiq2 for minutiae cropped patches. However, they don't seem to work, it gives the following error:

Error: NFIQ2 computeQualityScore returned an error code: Cannot compute Frequency Domain Analysis (FDA): Not enough data to generate histogram bins (is the image blank?)

Could you please confirm if nfiq2 will work for patches or provide a solution for the same?

gfiumara commented 1 year ago

NFIQ 2 is designed to compute a quality score for finger images at 500 ppi spatial sampling rate and a bit depth of 8 bit for the grayscale pixel intensity values scanned or captured using optical area sensors.