• circular
  • In order to use an iris pattern based on a clinical experience of the iridology as the feature point, the iris analysis region is divided into 13 sectors and each sector is subdivided into 4 circular regions based on a center of the pupil. (justia.com)
  • pupillary
  • In a process for precisely dividing the pupil from the iris by detecting a pupil boundary, it is very important to achieve a feature point and a normalized feature quantity regardless of a pupillary dilation without allocating the same part of the iris analysis region to the same coordinates when the image is analyzed. (justia.com)
  • abnormal
  • It can be easily distinguished from other abnormal pupils by normal reactions to bright light, near response and lesser degree of inequality. (prezi.com)
  • The exact mechanism is unknown, however there appears to be a component of abnormal corneal endothelium that proliferates onto the iris forming a membrane that then obstructs the trabecular meshwork, leading to iris distortion [1, (wikipedia.org)
  • Nodule formation can also occur when the abnormal corneal endothelium causes contractions around the iris stroma . (wikipedia.org)
  • 1994
  • In 1994 he patented this basis for iris recognition and its underlying computer vision algorithms for image processing, feature extraction, and matching, and published them in a paper. (wikipedia.org)
  • recognition
  • and, more particularly, to a pupil detection method and a shape descriptor extraction method for an iris recognition that can provide a personal identification based on an iris of an eye, an iris feature extraction apparatus and method and iris recognition system and method using the same, and a computer-readable recording medium that records programs implementing the methods. (justia.com)
  • Since among various biometric methods, the iris is broadly known as most effective in a view of identity, invariance and stability, and a failure rate of the recognition is very low, the iris is applied to a field that requires high security. (justia.com)
  • Generally, in method for identifying a person using the iris, it is indispensable to detect speedily a pupil and the iris for real-time iris recognition from an image signal of an eye of the person. (justia.com)
  • Hereinafter, features of the iris and a conventional method for the iris recognition will be described. (justia.com)
  • The iris recognition system extracts an image signal from the iris, transforms the image signal to specialized iris data, searches identical data to the specialized iris data in a database and compares the searched data to the specialized iris data, to thereby identify the person for acceptance or refusal. (justia.com)
  • Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on video images of one or both of the irises of an individual's eyes, whose complex patterns are unique, stable, and can be seen from some distance. (wikipedia.org)
  • Iris recognition uses video camera technology with subtle near infrared illumination to acquire images of the detail-rich, intricate structures of the iris which are visible externally. (wikipedia.org)
  • Several hundred million persons in several countries around the world have been enrolled in iris recognition systems for convenience purposes such as passport-free automated border-crossings and some national ID programs. (wikipedia.org)
  • A key advantage of iris recognition, besides its speed of matching and its extreme resistance to false matches, is the stability of the iris as an internal and protected, yet externally visible organ of the eye. (wikipedia.org)
  • Although John Daugman developed and patented the first actual algorithms to perform iris recognition, published the first papers about it and gave the first live demonstrations, the concept behind this invention has a much longer history and today it benefits from many other active scientific contributors. (wikipedia.org)
  • With various improvements over the years, these algorithms remain today the basis of all significant public deployments of iris recognition, and they are consistently top performers in NIST tests (implementations submitted by L-1, MorphoTrust and Morpho, for whom Daugman serves as Chief Scientist for Iris Recognition). (wikipedia.org)
  • In the early years of this century, major deployments began at Amsterdam's Schiphol Airport and at ten UK airport terminals allowing frequent travellers to present their iris instead of their passport, in a programme called IRIS: Iris Recognition Immigration System. (wikipedia.org)
  • Eyes
  • John Derry breaks down exactly how to make the most of a subject's eyes, reviewing the three major areas for enhancement: iris, pupil, and eyelashes. (lynda.com)
  • Buy this Royalty Free Stock Photo on Eyes Emotions Audience Pupil Iris Insight Fix Tack Eyewitness for your Editorial or Promotional Website, Book Cover, Flyer, Article, Wordpress Blog and Template from Photocase. (photocase.com)
  • They are humanoid in appearance, but are generally larger than humans with grey skin and red eyes without visible iris or pupil. (wikipedia.org)
  • small
  • In this case I present a variety of phaco techniques and pearls as cataract extraction and multifocal IOL implantation is performed in an eye with a small pupil and moderately floppy iris. (mackoolonlinecme.com)
  • You will see, I take a small brush and apply a little food color to the lip and press on the eye where the pupil will go. (instructables.com)
  • secondary
  • Iridocorneal Endothelial (ICE) syndromes are a spectrum of diseases characteriezed by slowly progressive abnormalities of the corneal endothelium and features including corneal edema, iris distortion, and secondary angle-closure glaucoma. (wikipedia.org)
  • Iris Murdoch: a descriptive primary and annotated secondary bibliography. (wikipedia.org)
  • size
  • and d) determining a location and a size of the pupil by obtaining a radius of a circle and coordinates of a center of the circle based on a center candidate point, wherein the center candidate point is a center point of perpendicular bisectors of straight line between the neighbor boundary candidate points, to thereby detect the pupil. (justia.com)
  • Normal pupil size varies from 2.5-4mm depending upon the illumination. (prezi.com)
  • Isocoria : Normally the two pupils are equal in size. (prezi.com)
  • Gummibär's right iris and pupil is greater in size than the corresponding left-sided features. (wikipedia.org)
  • ring-shape
  • The annulus iridis major includes iris furrows that are a ring-shape prominence concentric to the pulillary. (justia.com)
  • short
  • Scallop shaped pupils due to sector atrophy of the iris are seen sometimes in amyloidosis and neuropathy of short ciliary nerves. (prezi.com)