Efficient determination of biometric attribute for fast rejection of enrolled templates and other applications

A biometric input method, comprising:

• obtaining, by a processing system, a biometric image of an input biometric object;
• generating, by the processing system, a skeletonized ridge representation of the input biometric object based on the obtained biometric image;
• performing, by the processing system, a distance transform on the skeletonized ridge representation to determine a distance-to-nearest-ridge for each pixel of the skeletonized ridge representation;
• identifying local maxima based on the performed distance transform;
• and
• determining an attribute of the biometric image based on the performed distance transform and the identified local maxima.

A non-transitory, computer-readable medium having processor-executable instructions stored thereon for biometric input, the processor-executable instructions, when executed, facilitating performance of the following:

• generating a skeletonized ridge representation of an input biometric image corresponding to an input biometric object;
• performing a distance transform on the skeletonized ridge representation to determine a distance-to-nearest-ridge for each pixel of the skeletonized ridge representation;
• identifying local maxima based on the performed distance transform;
• and
• determining an attribute of the biometric image based on the performed distance transform and the identified local maxima.