Here is an overview of some similarities and differences between iris and retina scanning: Since the Retina is located on the back of the eye, retinal scanning was not widely accepted due to the intrusive process required to capture an image. Retinal Scanning requires a very close encounter with a scanning device that sends a beam of light deep inside the eye to capture an image of the Retina. This allows for a non-intrusive method of capturing an image since you can simply take a picture of the iris from a distance of 3 to 10 inches away. The Iris is the colored ring around the pupil of the eye and is the only internal organ visible from outside the body. Iris Recognition uses a camera, which is similar to any digital camera, to capture an image of the Iris. Similarities and Differences: While both iris and retina scanning are ocular based biometric technologies, there are distinct similarities and differences that differentiate the two modalities. Advantage of iris #biometrics is stability of iris as internal, protected, externally visible organ. 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, protected, yet externally visible organ of the eye. Hundreds of millions of persons in 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 systems based on this technology are being deployed. Databases of enrolled templates are searched by matcher engines at speeds measured in the millions of templates per second per (single-core) CPU, and with infinitesimally small False Match rates. Digital templates encoded from these patterns by mathematical and statistical algorithms allow unambiguous positive identification of an individual. Unlike retina scanning, iris recognition uses camera technology with subtle infrared illumination to acquire images of the detail-rich, intricate structures of the iris. ![]() Iris recognition is an automated method of biometric identification that uses mathematical pattern-recognition techniques on video images of the irises of an individual’s eyes, whose complex random patterns are unique and can be seen from some distance. The larger the pupil, the more light can enter. In response to the amount of light entering the eye, muscles attached to the iris expand or contract the aperture at the center of the iris, known as the pupil. In some cases, it can be hazel (a combination of light brown, green and gold), grey, violet, or even pink. “Eye color” is the color of the iris, which can be green, blue, or brown. ![]() Iris Scanning: The iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina. Likewise, indications of chronic health conditions such as congestive heart failure, atherosclerosis, and cholesterol issues first appear in the eyes. Communicable illnesses such as AIDS, syphilis, malaria, chickenpox well as hereditary diseases like leukemia, lymphoma, and sickle cell anemia impact the eyes. Retinal scanning also has medical applications. The pattern of variations is converted to computer code and stored in a database. Because retinal blood vessels are more absorbent of this light than the rest of the eye, the amount of reflection varies during the scan. This beam of light traces a standardized path on the retina. A retinal scan is performed by casting an unperceived beam of low-energy infrared light into a person’s eye as they look through the scanner’s eyepiece. The blood vessels within the retina absorb light more readily than the surrounding tissue and are easily identified with appropriate lighting. (Source: Wikipedia) The RetinaĪ biometric identifier known as a retinal scan is used to map the unique patterns of a person’s retina. The network of blood vessels in the retina is so complex that even identical twins do not share a similar pattern. Although retinal patterns may be altered in cases of diabetes, glaucoma or retinal degenerative disorders, the retina typically remains unchanged from birth until death. Because of the complex structure of the capillaries that supply the retina with blood, each person’s retina is unique. Retinal Scanning: The human retina is a thin tissue composed of neuralcells that is located in the posterior portion of the eye. Let’s take a closer look at both and then explain how to write my essay about the similarities and differences in detail: Even though they both share part of the eye for identification purposes, these biometric modalities are quite different in how they work. In biometrics, iris and retinal scanning are known as “ocular-based” identification technologies, meaning they rely on unique physiological characteristics of the eye to identify an individual.
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