A living body detection method based on pupil grayscale

Abstract

The invention discloses a living body detection method based on the pupil gray scale. When the iris collection program performs iris collection, the living body detection is carried out through the gray scale of the pupil image in the user's eye image. The pupil is the light-through hole of the human eye. After passing through the lens, the light is imaged on the retina, and the light entering the pupil is rarely reflected out of the pupil. Therefore, the pupil is black when viewed under different brightness outside; while for the artificial eye printed on paper, the pupil area is only In the dark pattern printed out, the pupil area of ​​the artificial eye will show different gray levels under different brightness. Liveness detection based on the above pupil characteristics has the advantages of small amount of calculation and fast detection speed. For the most common piracy at present Take the iris image and print it on paper to deceive the iris recognition system, which has a good detection effect.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a living body detection method based on pupil grayscale. Background technique [0002] At present, the mainstream iris recognition algorithm has a false recognition rate generally lower than one in a million. Because of its extremely high accuracy, iris recognition technology is often applied to high-security scenarios, such as: banks, hospitals, and prisons; in this In this case, it is particularly important to identify non-living bodies and prevent others from stealing iris information and deceiving the iris recognition system with fake eyes. [0003] The pupil is the light opening of the human eye. The light that passes through the pupil passes through the lens and forms an image on the retina. The light that enters the pupil is rarely reflected out of the pupil. Therefore, the pupil is black when viewed under different brightness outside. In the artificial eye print...

AI Technical Summary

Problems solved by technology

[0003] The pupil is the light opening of the human eye. The light that passes through the pupil passes through the lens and forms an image on the retina. The light that enters the pupil is rarely reflected out of the pupil. Therefore, the pupil is black when viewed under different brightness outside. In the artificial eye printed on paper, the pupil area is just a dark pattern printed out. Under different brightness, the pupil area of ​​the artificial eye will show different gray levels. features to take full advantage of

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