Lie detection method and device

Abstract

The embodiment of the invention discloses a lie detection method and device. The lie detection method includes: acquiring a detection parameter of a subject, wherein the detection parameter includes afirst sound production record and a first expression picture; determining the first sound production record as a first input value, and inputting the first input value into a preset deep learning based sound detection model, and acquiring a sound characteristic of the first sound production record and / or a first confidence coefficient; determining the first expression picture as a second input value, and inputting the second input value into a preset deep learning based expression detection model, and acquiring an expression characteristic of the first expression picture and / or a second confidence coefficient; and generating a lie detection result according to the sound characteristic and / or the first confidence coefficient and the expression characteristic and / or the second confidence coefficient. The lie detection method and device can improve the accuracy of the lie detection result.

Description

technical field [0001] The invention relates to the technical field of data analysis, in particular to a lie detection method and device. Background technique [0002] At present, when performing lie detection on the tested person, the physical characteristics of the tested person are collected, such as: skin bioelectricity, heartbeat, sweat glands, blood pressure, etc., and the collected physical characteristics are analyzed to obtain the confidence level of the physical characteristics. When the confidence level When it is greater than the preset value, it is determined that the tested person is lying. [0003] In polygraph detection, in addition to physical characteristics, other characteristics are also included, such as expression and voice, which are also important characteristics for judging whether the person under test is lying. At present, the confidence level of other features except physical features cannot be obtained through equipment collection. It is general...

AI Technical Summary

Problems solved by technology

At present, the confidence level of other features except physical features cannot be obtained through equipment collection. It is generally determined by professionals through observation of the tested person, and the professional's judgment results will be affected by the professional's physical characteristics during the polygraph test. and psychological factors, and then add subjective factors to the polygraph results, making the polygraph results inaccurate

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