Fingerprint preview quality and segmentation

摘要

A ridge flow based fingerprint image quality determination can be achieved independent of image resolution, can be processed in real-time and includes segmentation, such as fingertip segmentation, therefore providing image quality assessment for individual fingertips within a four finger flat, dual thumb, or whole hand image. A fingerprint quality module receives from one or more scan devices ridge-flow--containing imagery which can then be assessed for one or more of quality, handedness, historical information analysis and the assignment of bounding boxes.

主权项

1. An image quality determination method, for an input image of any resolution, comprising:
receiving an image from a scanner; storing the received image in storage; determining, using a processor connected to the storage, a ridge flow for the received image, wherein a grid spacing for the received image is determined based on a resolution of the received image; establishing a ridge flow map for a portion of the received image; identifying one or more ridge flow detections; determining a quality of the received image at least based on the identified ridge flow detections; and determining whether to provide feedback, via one or more of an audio and video feedback device connected to the processor, to a fingerprintee.