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One reason for this is that an 8-bit gray fingerprint image is a fundamental base when converting the image to a 1-bit image with value 1 for ridges and value 0 for furrows. This process allows for enhanced edge detection so the fingerprint is revealed in high contrast, with the ridges highlighted in black and the furrows in white.
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. Mobile app distribution platform by Apple For the macOS version of the App Store, see Mac App Store. App Store Screenshot of the App Store on iOS Developer(s) Apple Initial release July 10, 2008 ; 16 years ago (July 10, 2008) Operating system iOS, iPadOS, watchOS, tvOS, and VisionOS Type ...