Example of one iris video sequence (60s).
| The video sequence obtained under NIR illumination is synchronized with the “visible light” pulses (a white LED was employed) applied to the other eye. Thus, it is possible to extract the features of the frames during pupil contraction or dilation without the interference of light reflections from the iris, pupil and sclera. Their movements are induced by the light stimulus applied to the other eye and, due to the consensual reflex, repeated by the eye whose image is being digitized without interference from visible light reflections | |||||
 The
prototype was built with two multi-spectral
cameras, digital and progressive scan model
AD-080GE, GigE Vision compliant, belonging
to the JAI C3 Advanced family.The left eye receives visible light stimuli (white light) at computer-controlled specific time intervals, while the right eye image is captured and digitized into a video sequence under NIR illumination. The two sides of the device related to the left and right eye are optically isolated from each other. |
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  ContractionDilation |