Iris recognition is one of the most reliable methods for identification. In general, itconsists of image acquisition, iris segmentation, feature extraction and matching. Among them, iris segmentation has an important role on the performance of any iris recognition system. Eyes nonlinear movement, occlusion, and specular reflection are main challenges for any iris segmentation method. In thi...

Iris recognition is one of the most reliable methods for identification. In general, itconsists of image acquisition, iris segmentation, feature extraction and matching. Among them, iris segmentation has an important role on the performance of any iris recognition system. Eyes nonlinear movement, occlusion, and specular reflection are main challenges for any iris segmentation method. In thi...

The results of clinical examinations and follow-up of 7 patients with floppy eyelid syndrome are presented. The most prominent features of the syndrome are floppy upper eyelids that can be easily everted, with papillary conjunctivitis and punctate keratopathy. The ocular changes seem to be the result of an underlying metabolic (or endocrine) disorder. In the patient with the longest follow-up p...

© 2014 Canadian Medical Association or its licensors CMAJ 1 A 52-year-old man presented with redness and irritation of the left eye. He had tried using artificial tear drops and gels without much benefit. On examination, the patient had redundant, wrinkled eyelid skin bilaterally with a greater amount on the affected side (Figure 1A). Ptosis of the left upper eyelid was evident, and the upper e...

Model lattices consisting of balls connected by central-force springs provide much of our understanding of mechanical response and phonon structure of real materials. Their stability depends critically on their coordination number z. d-dimensional lattices with z = 2d are at the threshold of mechanical stability and are isostatic. Lattices with z < 2d exhibit zero-frequency "floppy" modes that ...

Biometric recognition is an automatic identification method which is based on unique features or characteristics possessed by human beings and Iris recognition has proved itself as one of the most reliable biometric methods available owing to the accuracy provided by its unique epigenetic patterns. The main steps in any iris recognition system are image acquisition, iris segmentation, iris norm...