In minutiae feature extraction algorithm

In minutiae feature extraction algorithm for fingerprint, i extract the ridge and bifurcations points x,y,angle. what i want to know is all the extracted points is considered as a ridge ? or each x,y,angle is a separate ridge i don't understand. if we supposed that i extracted 40 points of ridge endig and 50 for bifurcation, then is all these points are considered as one ridge ? how should i know what are the points in the same ridge