Abstract: An individual identification device and a method for extracting an iris region which can extract the iris region with high accuracy even if the shape of a pupil is not circular as in the case of a horse, cattle or the like. Contour lines of the pupil and an granula iridia are extracted from an image inputted. Part of a circle is applied to a contour line of the pupil and a radius of the contour line outside the iris region is estimated by an angle formed by two lines, one to connect both ends of the pupil and the other to pass the center of the circle. An iris circle is estimated by applying part of the circle to the contour line inside and outside the iris region.

Abstract: A system for identifying individuals, which easily reveals the cause of misjudgment when it occurred, wherein individual identification means 4 identifies an individual by comparing an input image with a recognition dictionary 2, wherein identification result analysis means 6 analyzes an identification result of the individual identification means 4, and detects that portion of a region, used for identification, of the input image, which differs from the recognition dictionary 2, wherein result output control means 5, if an analysis result of the identification result analysis means 6 is that the input image differs from the dictionary image for the most part, directs only the input image to be displayed, and if the identification result is that the input image partially differs from the dictionary image, directs at least the input image and also the discordant portion to be displayed.

Abstract: A system for identifying individuals, which easily reveals the cause of misjudgment when it occurred, wherein individual identification means 4 identifies an individual by comparing an input image with a recognition dictionary 2, wherein identification result analysis means 6 analyzes an identification result of the individual identification means 4, and detects that portion of a region, used for identification, of the input image, which differs from the recognition dictionary 2, wherein result output control means 5, if an analysis result of the identification result analysis means 6 is that the input image differs from the dictionary image for the most part, directs only the input image to be displayed, and if the identification result is that the input image partially differs from the dictionary image, directs at least the input image and also the discordant portion to be displayed.

Abstract: A system for identifying individuals, which easily reveals the cause of misjudgment when it occurred, wherein individual identification means 4 identifies an individual by comparing an input image with a recognition dictionary 2, wherein identification result analysis means 6 analyzes an identification result of the individual identification means 4, and detects that portion of a region, used for identification, of the input image, which differs from the recognition dictionary 2, wherein result output control means 5, if an analysis result of the identification result analysis means 6 is that the input image differs from the dictionary image for the most part, directs only the input image to be displayed, and if the identification result is that the input image partially differs from the dictionary image, directs at least the input image and also the discordant portion to be displayed.

Abstract: An animal identification system is provided which is designed to determine outlines of a pupil and irial granule in an input image of an eye of an animal to be identified, apply an arc to a lower portion of the outline of the pupil, turns back the arc from a principal axis to define a reference axis, and maps an image of the irial granule into a polar coordinate system whose origin is the center of the reference axis. The shape of the irial granule corrected in the above manner is compared with a reference shape stored in a memory to determine whether the input image arises from the same animal or not.

Abstract: A system for identifying individuals, which easily reveals the cause of misjudgment when it occurred, wherein individual identification means 4 identifies an individual by comparing an input image with a recognition dictionary 2, wherein identification result analysis means 6 analyzes an identification result of the individual identification means 4, and detects that portion of a region, used for identification, of the input image, which differs from the recognition dictionary 2, wherein result output control means 5, if an analysis result of the identification result analysis means 6 is that the input image differs from the dictionary image for the most part, directs only the input image to be displayed, and if the identification result is that the input image partially differs from the dictionary image, directs at least the input image and also the discordant portion to be displayed.

Abstract: An individual animal identification apparatus has an eye region image pick-up unit for obtaining an input image by taking a picture of an eye, including an iridial granule, of an animal to be registered and identified, a geometric normalizer for performing a coordinate transformation process by using a specified parameter to move the iridial granule region of the input image onto predetermined coordinates, a feature extractor for extracting the feature of the normalized iridial granule, a dictionary memory for registering data on the features of the iridial granule regions corresponding to animals to be registered, the data having been extracted by the feature extractor, and a collator for checking whether or not an animal to be identified has been registered by comparing data on the feature of the iridial granule region corresponding to the animal under identification, the feature having been extracted by the feature extractor, with the feature data registered in the dictionary memory.

Abstract: An animal identification system is provided which is designed to determine outlines of a pupil and irial granule in an input image of an eye of an animal to be identified, apply an arc to a lower portion of the outline of the pupil, turns back the arc from a principal axis to define a reference axis, and maps an image of the irial granule into a polar coordinate system whose origin is the center of the reference axis. The shape of the irial granule corrected in the above manner is compared with a reference shape stored in a memory to determine whether the input image arises from the same animal or not.

Abstract: There is provided an individual identification system and a method thereof which are capable of identifying individuals having elliptical pupils and elliptical irises. In the individual identification system 10, the image storage unit 11 stores eye images 20, the ellipse preparation unit 12 prepares a plurality of ellipses, and the pixel addition unit 13 adds up pixels laid along circumferences of the ellipses. The ellipse selection unit 14 selects ellipses representative of the pupil 21 and the iris 22 among the plurality of ellipses based upon the sums of the pixels given by the pixel addition unit 13, whereby the parameters of the selected ellipses are output.

Abstract: An input image that includes an eye is divided into a plurality of blocks, and a mosaic image in which each of the blocks has a density value is produced. Among all the blocks, one having a small distance from a center point of the mosaic image and having a small density value is determined to be a block including the center of the pupil of the eye. Then, based on the determined block, a center position of the pupil in the input image is derived. Based on the density value of the block including the center of the pupil, a density threshold value is set. Then, based on the density threshold value, a two-valued image is produced from the input image. Among regions in the two-valued image which are darker than the density threshold value, one including the center position of the pupil is extracted as a pupil region.

Abstract: An individual identification system and method for identifying individuals having elliptical pupils and elliptical irises. In the individual identification system, an image storage unit stores eye images, an the ellipse preparation unit prepares a plurality of ellipses, and a pixel addition unit adds up pixels laid along circumferences of the ellipses. An ellipse selection unit selects ellipses representative of the pupil and the iris among the plurality of ellipses based upon the sums of the pixels given by the pixel addition unit, whereby the parameters of the selected ellipses are output.

Abstract: An animal body identifying device of the present invention includes a camera for photographing an eye of an animal, a body data capturer for capturing body data for the photographed animal from an image photographed by the camera, a body data registry for pre-storing a plurality of body data and a body data collator for correlating body data stored in the body data registry with body data captured by the body data capturer and identifying whether or not the photographed animal is a registered animal. An animal body identifying system of the present invention includes a body data capturing device for photographing an eye of an animal and capturing body data for the animal and a body data comparing device for collating body data obtained from the body data capturing device with pre-registered body data and determining whether or not the photographed animal is a registered animal.