ISO/IEC 29794-4:2017 establishes
- terms and definitions for quantifying finger image quality,
- methods used to quantify the quality of finger images, and
- standardized encoding of finger image quality,
for finger images at 196,85 px/cm spatial sampling rate scanned or captured using optical sensors with capture dimension (width, height) of at least 1,27 cm × 1,651 cm.