Texture features for biometric authentication

摘要

In general, one aspect of the subject matter described can be embodied in methods that include obtaining one or more image regions from a first image of an eye. Each of the image regions may include a view of a respective portion of the white of the eye. The method may further include applying several distinct filters to each of the image regions to generate a plurality of respective descriptors for the region. The several distinct filters may include convolutional filters that are each configured to describe one or more aspects of an eye vasculature and in combination describe a visible eye vasculature in a feature space. A match score may be determined based on the generated descriptors and based on one or more descriptors associated with a second image of eye vasculature.

主权项

1. A computer-implemented method comprising:
obtaining one or more image regions from a first image of an eye, wherein each of the image regions includes a view of a respective portion of vasculature of the eye external to a corneal limbus boundary of the eye; applying a convolutional filter to each of the image regions at a plurality of different orientations to generate a plurality of respective filtered images for the image region; generating a respective descriptor for each of the image regions based on, at least, phases of image data elements in the respective filtered images for the image region wherein generating comprises thresholding image data elements of the respective filter images for the image region based on phase values of the image data elements to create respective thresholded images for the image region by setting image data elements having phase values above a first threshold or below a second threshold to a first value, and setting image data elements having phase values in the range of the first threshold to the second threshold to a different second value; and determining a score based on the generated descriptors and based on one or more descriptors associated with a second image of eye vasculature.