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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Two New Methods for Locating Outer Edge of Iris
verfasst von : Yujie Liu, Hong Tian
Erschienen in: Advances in Image and Graphics Technologies
Verlag: Springer Berlin Heidelberg
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The two new methods for locating the outer edge of iris were presented by researching of iris images. The first is to locate the inner edge of iris by using canny operator and Hough transform method. The selection of the appropriate threshold is based on the diagram which observes the color distribution of the iris image; the second is that the circle integral and linear segment methods to locate the outer edge of iris are presented. We would like to indicate that the experiment results show that both of the two methods have the following qualities: rapidity, availability, real time calculations and accuracy in locating the iris outer edge.