Will authentication be affected by the dryness or wetness of the finger?
Frankly speaking, no fingerprint sensor can capture the full spectrum of extremely wet to extremely dry fingerprints. However, the range detected can be improved by auto-regulation through the quality feedback from the image captured.
If the fingerprint is very dry or fine:
- The quality will depend on the image-capturing ability of the scanner. CCD would provide the best scanning quality, but these scanners are not cost-effective. Optical scanners are less expensive, but their indirect scanning method produces less satisfactory results.
- The best solution would be direct scanning methods offered by solid state devices, such as TouchStrip.
If the fingerprint is very wet:
- The TouchStrip on AET62 and AET65 has a special coating to address wet fingers.