Remote iris tracking and acquiring method based on microphone array

Abstract

The invention discloses a remote iris tracking and acquiring method based on a microphone array, which includes the following steps: S1, a sound source locating module of a microphone array is started according to the voice of a user distributed within the voice acquisition range of the distributed microphone array, and tracks and calculates the position information of the mouth of the user in a three-dimensional space in real time; S2, the sound source locating module transmits the position information to a central processing control module, and if the position information is within the work range of an infrared camera and a holder, the central processing control module makes a high-speed holder and zoom module of the infrared camera aligned with the head of the user for zoom-in focus shooting to get multiple infrared images of the head of the user; and S3, a voice wakeup module identifies whether the current user voice is an agreed wakeup word according to the voice; if the current user voice is not an agreed wakeup word, the voice is invalid, and the infrared images are ignored; and if the current user voice is an agreed wakeup word, the voice is valid, and the infrared images collected are used in iris recognition. The remote iris tracking and acquiring method of the invention has the advantages of high accuracy, high practicability and high verification speed.

Description

technical field [0001] The present invention relates to a long-distance iris image collection method, and more specifically, to a long-distance iris tracking and collection method based on a distributed microphone array. Background technique [0002] Iris recognition is a high-accuracy non-contact biometric recognition technology with very broad application scenarios. Micro-distance and short-distance iris collection devices require the user's eyes to get close to the camera to take iris pictures, which limits the actual use scenarios. With the rapid development of camera technology, cameras larger than 10 million pixels have been widely used. With high-speed pan / tilt and zoom modules and infrared narrow-band filters, we can get high-quality iris pictures within a range of 1-10 meters. Compared with the traditional special equipment for micro-distance iris collection, this long-distance collection method based on infrared camera module has the characteristics of low cost an...

AI Technical Summary

Problems solved by technology

However, the accuracy of voiceprint recognition is still lower than that of fingerprints and irises, and it cannot perform high-accuracy tasks in some environments, such as payment

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