CN108983966B - Criminal reconstruction assessment system and method based on virtual reality and eye movement technology - Google Patents
Criminal reconstruction assessment system and method based on virtual reality and eye movement technology Download PDFInfo
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Abstract
The invention discloses a criminal reconstruction system and a criminal reconstruction method based on virtual reality and eye movement technology, wherein the criminal reconstruction method comprises the following steps: receiving interaction information of a criminal in an interaction process in a virtual reality scene, wherein the interaction information is acquired by virtual reality interaction equipment, and the interaction is carried out according to a set interaction link; and carrying out criminal reconstruction and evaluation by adopting a pre-established decision tree prediction model. The invention effectively evaluates the reconstruction condition of the criminal by recording various behaviors and characteristic information of the criminal in the interactive process, avoids the criminal from deceiving police officers in the reconstruction process and truly reflects the reconstruction condition of the criminal.
Description
Technical Field
The invention relates to the field of prison criminal modification and evaluation, in particular to criminal modification and evaluation based on VR interaction and eye movement technologies.
Background
At present, the educational reconstruction of criminals is the core part and the main task of the prison constitution in China, and through the educational reconstruction system of prisons, criminals under escort can be reconstructed into good citizens who obey laws and self-help. The educational reconstruction of criminals is a complicated and difficult system project, and the evaluation of the reconstruction situation of criminals is a difficult and continuous work which plays a crucial role in improving the quality of the educational reconstruction of criminals. The traditional criminal reconstruction assessment mainly comprises: the prison police officer carries out comprehensive evaluation by observing the modification performance of a criminal and collecting related information, and evaluates the criminal by carrying out psychological test on the criminal to obtain psychological test data. However, in the education and reconstruction of criminals, a considerable number of criminals lose consciousness due to reconstruction, do not accept convict service laws and reassurance reconstruction, and are speculated to get handy and try to achieve the purposes of criminal reduction and parole. The traditional criminal reconstruction assessment method for the situation is difficult to make accurate and effective assessment.
With the rapid development of science and technology, VR (virtual reality) technology has matured in recent years, and corresponding products are more and more popular in people's daily life. The VR related product mainly utilizes a computer to generate a simulation environment, is a system simulation of multi-source information fusion and interactive three-dimensional dynamic vision and entity behaviors, and can simulate various scene modes in reality. In the process of the continuous development of computer vision technology, eye movement technology is also intensively studied. At present, products combining eye movement technology and VR are also available in the market, and various information data such as limbs, heads and eye spirit of users can be captured. Psychology, in a certain environmental scene, various information data such as limbs, heads, eye spirit and the like of people are connected with the thought of people.
How to objectively and accurately perform criminal reconstruction and assessment is a technical problem which is urgently solved by technical personnel in the field at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a criminal reconstruction evaluation system and method based on virtual reality and eye movement technology, multiple daily life scenes are simulated through VR technology, and criminals can interact in the simulated VR scenes. Various behaviors and characteristic information in the criminal interaction process are recorded by combining the VR technology and the eye movement technology, and data excavation and tunneling one-step modeling analysis and prediction are adopted for the acquired information, so that the criminal reconstruction condition is effectively evaluated, the situation that a criminal is put into operation and taken out of order in the reconstruction process to cheat police personnel in a prison is avoided, and the criminal reconstruction condition is truly reflected.
In order to achieve the purpose, the invention adopts the following technical scheme:
a criminal improvement assessment system based on virtual reality and eye movement techniques, comprising: a virtual reality interaction device and a background server, wherein,
the virtual reality interaction equipment acquires interaction information of a criminal in an interaction process in a virtual reality scene and transmits the interaction information to the background server; the interaction is carried out according to a set interaction task;
and the background server receives the interaction information and adopts a pre-established decision tree prediction model to carry out criminal reconstruction and evaluation.
Further, the interaction information comprises the number, frequency, duration and percentage of total duration of each interaction task in the interaction process in the whole interaction time, and action information, emotion and eye movement information.
Further, the motion information includes a motion gesture.
Further, the eye movement information includes the attention of the criminal to each area in the simulated scene.
Further, the background server comprises a criminal information database used for storing basic information and test data of each criminal.
Further, the establishing process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing the interaction information and converting the interaction information into feature vector data;
and training the prediction model through a decision tree algorithm.
According to a second object of the present invention, the present invention also provides a criminal reconstruction method based on virtual reality and eye movement technology, comprising the following steps:
receiving interaction information of a criminal in an interaction process in a virtual reality scene, wherein the interaction information is acquired by virtual reality interaction equipment, and the interaction is carried out according to a set interaction link;
and carrying out criminal reconstruction and evaluation by adopting a pre-established decision tree prediction model.
Further, the establishing process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing the interaction information and converting the interaction information into feature vector data;
and training the prediction model through a decision tree algorithm.
According to a third object of the present invention, there is also provided a criminal reconstruction assessment apparatus based on virtual reality and eye movement technology, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the program.
According to a fourth object of the present invention, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the above-described criminal reconstruction assessment method based on virtual reality and eye movement techniques.
The invention has the advantages of
1. The invention collects the action, emotion and eye movement information through the virtual reality device, and can reflect the psychological state of the criminal from a plurality of angles, so the evaluation result of the invention has more authenticity compared with the traditional direct observation or psychological test.
2. The invention collects criminal interaction information data through virtual reality equipment in combination with an eye movement technology, and analyzes and predicts the transformation situation of the criminal by applying a prediction model to the interaction information data, thereby effectively avoiding that the criminal gets skillful and tries to deal with the education transformation of prisons to achieve the purposes of criminal reduction and parole due to the transformation consciousness desalination, non-convict service law and reassurance transformation, and truly reflecting the transformation situation of the criminal, thereby solving the defects of the existing criminal transformation and assessment method.
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The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is an overall block diagram of criminal reconstruction assessment based on virtual reality and eye movement techniques.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Due to the closed environment of prisons, criminals are difficult to touch the social environment during their prison service, so many criminals are unfamiliar with the increasingly changing social environment. The invention adopts VR technology to simulate various scenes of daily life in society, including traffic scenes (airplane stations, railway stations, bus stations, subway stations, bus stations, and the like), shopping scenes (superstores, e-commerce simulation scenes, and the like), social scenes (WeChat, QQ, and the like), and other scenes represented by modern social characteristics, and sets corresponding interactive links in the simulated real life in each scene according to requirements, so that criminals can interact in the simulated scenes to realize intelligent interaction.
The invention simulates various real life scenes by using VR technology, enables criminals to carry out intelligent interaction in the simulated scene through front end VR equipment, collects eye signals of criminal interaction process, and data information such as attention, action, motion posture, emotion, frequency, duration of various interactions, percentage of total duration in the whole interaction time, and the like, carries out modeling analysis of a prediction model on known data information by using a decision tree algorithm, and predicts the collected criminal interaction information data by using the prediction model, thereby evaluating the reconstruction condition of the criminals.
Example one
The embodiment discloses a criminal reconstruction assessment system based on virtual reality and eye movement technology, which comprises a head-wearing virtual reality interaction device and a background server.
Head-mounted virtual reality interaction device, including:
the scene display device is used for displaying the virtual reality interaction scene and the interaction task; and the criminal interacts with the scene according to the set interaction task.
The behavior acquisition device is used for acquiring action images of criminals in the interaction process in the virtual reality scene and transmitting the action images to the data processing device;
the face acquisition device is used for acquiring a face image of a criminal in an interaction process in a virtual reality scene and transmitting the face image to the data processing device;
the eye movement tracking device is used for acquiring eyeball images of criminals in the interaction process in the virtual reality scene and transmitting the eyeball images to the data processing device;
the data processing device is used for receiving selection aiming at the virtual reality interactive scene and outputting the selection to the scene display device;
receiving the criminal action image transmitted by the action acquisition device, and analyzing the action information and the operation instruction of the criminal based on the characteristics of the head, the limbs and the like;
analyzing the interactive frequency, duration and the percentage of the total duration of each interactive task in the interactive process in the whole interactive time according to the operation instruction and the interactive tasks; specifically, the total interaction time is the total duration of each interaction of the criminal, the number of interactions represents the number of interactions of a single interaction task in the total interaction time, the duration represents the single interaction time of the single interaction task, and the total duration represents the total time of multiple interactions of the single interaction task.
Receiving facial image data of a criminal transmitted by the behavior acquisition device, and analyzing the emotion of the criminal based on the facial image data;
receiving criminal eyeball image data transmitted by the behavior acquisition device, extracting characteristics of the eyeball pupils of the criminals based on an image processing technology, and calculating the attention of the criminals to each area in the simulation scene in real time through the characteristics;
a backend server, comprising:
the data acquisition device acquires information data recorded by the front-end VR interactive equipment in real time through a wireless network, preprocesses the acquired information data to remove noise and some irrelevant or redundant information, and stores the preprocessed information data into a criminal information database; the criminal information database establishes different data headers according to different attributes of criminal information data, wherein the data headers comprise criminal names, criminal testing times, criminal eye signals, the attention of criminals to various areas of a scene, criminal actions, criminal movement postures, criminal emotions, various interaction times, frequencies, duration time and the percentage of the total duration time in the whole interaction time.
The criminal reconstruction assessment device collects interactive data of criminals in a VR scene, and predicts the collected data by applying an established prediction model, so that the reconstruction condition of the criminals is assessed and assessment results (excellent, good, qualified and unqualified) are given.
The training process of the prediction model is as follows: a prediction model is established in advance by adopting a decision tree algorithm according to known criminal interaction information data.
Determining a training set: selecting excellent, good, qualified and unqualified criminals with the same number of persons according to the reconstruction condition of the known criminals, and enabling the criminals to interact in a simulation scene established by the criminal reconstruction evaluation system based on VR interaction and eye movement technology, so that the interactive information data of the criminals are collected as a training set; the interactive information data includes: recording various information of the criminals such as actions, motion postures and emotions, and counting the times, frequency, duration time, the percentage of the total duration time in the whole interaction time and the like of various interactions, and the attention of the criminals to various areas in the simulation scene;
data conversion: for information data collected and preprocessed by criminals in the simulation scene interaction, data conversion is needed because the data belong to data with different dimensions. The invention adopts a z-score standardization (zero-mean normalization) algorithm to carry out data standardization processing on the collected and preprocessed information data so as to solve comparability between data indexes, and after the data standardization processing, all the data indexes are in the same order of magnitude and are finally quantized into feature vector data;
training a prediction model: the prediction model is trained through a decision tree algorithm, so that the model has better robustness.
The invention adopts the current mainstream VR helmet and combines the eye movement technology to form the front end VR interactive equipment, and the front end VR interactive equipment can transmit data to the background in real time through a wireless network. The front-end VR interactive equipment can enable criminals to interact in an established simulation scene according to set interactive links, for example, criminals can simulate to buy train tickets and get tickets, check the train in a security manner, get on the train according to the ticket information, get off the train and the like in the scene of a train station through the VR interactive equipment. In the intelligent interaction process of a criminal in a simulation scene, the VR interaction equipment can record and record various information of the criminal, such as the action, the motion posture, the emotion and the like, and count the times, the frequency, the duration time, the percentage of the total duration time in the whole interaction time and the like of various interactions, and also capture an eye signal of the criminal in the interaction process by using an eye movement technology and count the attention of the criminal to each area in the simulation scene in real time.
Example two
The embodiment provides a criminal reconstruction assessment method based on virtual reality and eye movement technology, which comprises the following steps:
receiving interaction information of a criminal in an interaction process in a virtual reality scene, wherein the interaction information is acquired by virtual reality interaction equipment, and the interaction is carried out according to a set interaction link;
and carrying out criminal reconstruction and evaluation by adopting a pre-established decision tree prediction model.
The establishment process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing the interaction information and converting the interaction information into feature vector data;
and training the prediction model through a decision tree algorithm.
EXAMPLE III
An object of the present embodiment is to provide a computing device.
A criminal reconstruction assessment apparatus based on virtual reality and eye movement techniques, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the program implementing the steps comprising:
receiving interaction information of a criminal in an interaction process in a virtual reality scene, wherein the interaction information is acquired by virtual reality interaction equipment, and the interaction is carried out according to a set interaction link;
and carrying out criminal reconstruction and evaluation by adopting a pre-established decision tree prediction model.
The establishment process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing the interaction information and converting the interaction information into feature vector data;
and training the prediction model through a decision tree algorithm.
Example four
An object of the present embodiment is to provide a computer-readable storage medium.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, performs the steps of:
receiving interaction information of a criminal in an interaction process in a virtual reality scene, wherein the interaction information is acquired by virtual reality interaction equipment, and the interaction is carried out according to a set interaction link;
and carrying out criminal reconstruction and evaluation by adopting a pre-established decision tree prediction model.
The establishment process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing the interaction information and converting the interaction information into feature vector data;
and training the prediction model through a decision tree algorithm.
The steps related to the second, third and fourth embodiments correspond to the first embodiment, and the detailed description thereof can be found in the relevant description part of the first embodiment. The term "computer-readable storage medium" should be taken to include a single medium or multiple media containing one or more sets of instructions; it should also be understood to include any medium that is capable of storing, encoding or carrying a set of instructions for execution by a processor and that cause the processor to perform any of the methods of the present invention.
The invention provides a criminal reconstruction assessment system and method based on VR interaction and eye movement technology, which collects criminal interaction information data through VR equipment and eye movement technology, and analyzes and predicts the reconstruction condition of a criminal by applying a prediction model to the interaction information data, so that the criminal is effectively prevented from fading reconstruction consciousness, not authenticating a service law and reassuring reconstruction, but is skillfully put into operation and thinks to try to cope with the educational reconstruction of prisons to achieve the purposes of criminal reduction and parole release, the reconstruction condition of the criminal is truly reflected, and the defects of the existing criminal reconstruction assessment method are overcome.
Those skilled in the art will appreciate that the modules or steps of the present invention described above can be implemented using general purpose computer means, or alternatively, they can be implemented using program code that is executable by computing means, such that they are stored in memory means for execution by the computing means, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps of them are fabricated into a single integrated circuit module. The present invention is not limited to any specific combination of hardware and software.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (6)
1. A criminal improvement assessment system based on virtual reality and eye movement techniques, comprising: a virtual reality interaction device and a background server, wherein,
the virtual reality interaction equipment acquires interaction information of a criminal in an interaction process in a virtual reality scene and transmits the interaction information to the background server; the interaction is carried out according to a set interaction task;
the background server receives the interaction information and adopts a pre-established decision tree prediction model to carry out criminal reconstruction and evaluation;
the interaction information comprises the number, frequency, duration and the percentage of the total duration of each interaction task in the interaction process in the whole interaction time, and action information, emotion and eye movement information; the eye movement information comprises the attention degree of a criminal to each area in the simulation scene;
the establishment process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing and converting the interaction information into feature vector data: carrying out data standardization processing on the acquired and preprocessed information data by adopting a z-score standardization algorithm to solve comparability between data indexes, wherein after the data standardization processing, all the data indexes are in the same order of magnitude, and finally quantizing the data into feature vector data; and training the prediction model through a decision tree algorithm.
2. The virtual reality and eye movement technology-based criminal reconstruction assessment system of claim 1, wherein the action information comprises a movement gesture.
3. The system for criminal reconstruction assessment based on virtual reality and eye movement technology as claimed in claim 1, wherein the background server comprises a criminal information database for storing basic information and test data of each criminal.
4. A criminal reconstruction assessment method based on virtual reality and eye movement technology is characterized by comprising the following steps:
receiving interaction information of a criminal in an interaction process in a virtual reality scene, wherein the interaction information is acquired by virtual reality interaction equipment, and the interaction is carried out according to a set interaction link;
carrying out criminal reconstruction and evaluation by adopting a pre-established decision tree prediction model;
the interaction information comprises the number, frequency, duration and the percentage of the total duration of each interaction task in the interaction process in the whole interaction time, and action information, emotion and eye movement information; the eye movement information comprises the attention degree of a criminal to each area in the simulation scene;
the establishment process of the decision tree is as follows:
four groups of criminals with excellent transformation, good transformation, qualified transformation and unqualified transformation conditions of the same number of people are respectively selected, and the interaction information of the criminals is collected by the virtual reality interaction equipment to serve as a training set;
quantizing and converting the interaction information into feature vector data: carrying out data standardization processing on the acquired and preprocessed information data by adopting a z-score standardization algorithm to solve comparability between data indexes, wherein after the data standardization processing, all the data indexes are in the same order of magnitude, and finally quantizing the data into feature vector data; and training the prediction model through a decision tree algorithm.
5. A criminal alteration evaluation apparatus based on virtual reality and eye movement techniques, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the method of claim 4.
6. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, performs the criminal alteration evaluation method based on virtual reality and eye movement techniques according to claim 4.
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| CN111477061A (en) * | 2020-06-02 | 2020-07-31 | 谭明新 | Supervision place VR education correction system based on VR technology |
| CN111784181B (en) * | 2020-07-13 | 2023-09-19 | 南京大学 | Evaluation result interpretation method for criminal reconstruction quality evaluation system |
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