Pristine Iris Image
Adaptive Optics delivers images that are always
These two issues are among the most significant challenges in iris biometrics imaging.
Closed loop control, central to Adaptive Optics functionality, maintains a fix on the subject’s eye during exposure, continuously adjusting the targeting and focus of the optical system.
AOptix is Exceeding Industry Specifications
Optical design experts in AOptix have also optimized the entire optical chain in both analog and digital domains, so that the resulting captured iris images exceed industry specification as defined by ISO and ANSI in standard 19794-6. The system is optimized for modulation transfer function (MTF), spatial resolution, motion blur avoidance, proper digital sampling rate, and digital sensor read, among other key engineering parameters.
Better Matching Through Higher Subject Image Quality
Outstanding digital iris images are merely one part of optimizing the biometrics matching result. Iris images of occluded or off-gaze angle eyes can severely compromise the ability of any iris encoding algorithm to provide templates suitable for very high accuracy matching.
Occluded irises from eyelids or eyelashes that simply cover up important iris structure information can confuse the segmentation subroutines in the algorithms that demark the border of the iris. Off-gaze angle images distort the iris image and can damage matching accuracy. Minimizing iris occlusion and off-gaze angle—or subject image quality—is crucial to optimization of matching results.
AOptix Advancement in Human Factors
- Speed of capture - one second for a single eye and two seconds for both eyes.
- Ease of subject participation - lends itself to effortless and immediate recapture when needed. Subjects simply step into the large capture volume, look at the imager and open their eyes. Since the AOptix system can measure real-time occlusion and eye-gaze angle as part of its on-board image quality metric, the operator will immediately know to recapture a set of images should the subject squint or look away.
Significant Accuracy Improvement
Setting a higher threshold for iris image acceptance, with special emphasis on minimizing occlusion and eye-gaze angle, is key to delivering “ideal imaging” and therefore to significantly improving accuracy rates.
While iris recognition is inherently resistant to false matches (or false acceptances), ideal imaging permits false non-match (or false reject) rates to plummet, while maintaining resistance to false matches.
Ideal imaging thereby enables compilation of very large high-quality databases, which offer unprecedented matching accuracy as required in a national or regional ID program, an immigration control program, or a governmental employee ID project.
In this additional way, the Adaptive Optics-based iris recognition is poised to revolutionize biometrics technology.
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