Automatic control device based on iris recognition

Abstract

The invention provides an automatic control device based on iris recognition. The automatic control device comprises an automatic control device and an iris recognizer which is in electrical signal connection with the automatic control device. The iris recognizer comprises a sampling module (1), a preprocessing module (2), a feature coding module (3) and a coding matching module (4). The feature coding module (3) is used for extracting and coding features of an iris image, and comprises a first LBP operator processing sub-module, a second LBP operator processing sub-module, a third LBP operator processing sub-module and a fourth LBP operator processing sub-module. According to the invention, the correlation between a center point and other surrounding areas is increased; image texture of different scales and frequencies can be realized; after repeated processing of the LBP operator processing sub-modules, coding length is constantly reduced without affecting the correlation between the center point and the surrounding areas; storage space is saved; calculation amount is reduced; the recognition speed is improved; the recognition accuracy is enhanced; and high robustness is acquired.

Description

technical field [0001] The invention relates to the field of automatic control device design, in particular to an automatic control device based on iris recognition. Background technique [0002] In related technologies, automatic control devices with identity verification functions usually use basic LBP (Local Binary Pattern) operators to extract and encode iris image features. LBP operators are a method for describing texture features in the grayscale range of images. It has strong robustness to illumination changes, so it is widely used in image texture feature extraction. [0003] The basic LBP operator is generally defined as: in a 3×3 window by the center point n c and its surrounding 8 neighbors n 0 ,... n 7 composition, where the texture T is defined as: T=(n 0 -n c ,n 1 -n c ,...,n 7 -n c ), binarize it, and use n c As the threshold, the 8 points of the neighborhood and n c Comparison, if the value greater than the center point is marked as 1, otherwise i...

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Problems solved by technology

[0005] In view of the above problems, the present invention provides an automatic control device based on iris recognition with fast recognition speed and wide recognition range, which solves the problem of automatic control device systems that use basic LBP operators to extract and encode iris image features in the related art. Problems dealing with image textures of different scales and frequencies

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