1. A method for verifying a user's identity from a test biometric image obtained from the user, the method comprising: comparing the test biometric image provided by an imaging device with reference biometric data stored in a reference database, wherein the reference biometric data comprises a plurality of reference biometric images of different portions of a surface of an organic tissue of the user, wherein each reference biometric image partially overlaps at least one other reference biometric image, and wherein the reference biometric data further comprises spatial correspondence between each reference biometric image and at least one other reference biometric image, and wherein comparing the test biometric image with reference biometric data comprises using a matching algorithm to compare the test biometric image with one or more of the reference biometric images to identify a matching reference image having overlapping data with the test biometric image; determining spatial correspondence between the test biometric image and the matching reference image; estimating areas of overlap between the test biometric image and the reference biometric images other than the matching reference image based on the spatial correspondence between the test biometric image and the matching reference image and the spatial correspondence between the matching reference image and each of the reference biometric images other than the matching reference image; and determining an amount of matching between the test biometric image and each of the reference biometric images other than the matching reference image in each estimated area of overlap.