Bfp final presentation


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  • Bfp final presentation

    1. 1. <ul><li>Presented by </li></ul><ul><li>LAKSHMY.J </li></ul><ul><li>Roll no:46 </li></ul><ul><li>S7 CS </li></ul><ul><li>MACE </li></ul>Brain Fingerprinting Technology
    2. 2. TOPIC OUTLINE <ul><li>1. Introduction </li></ul><ul><li>2. Working Principle </li></ul><ul><li>3. Scientific Procedure </li></ul><ul><li>4. Equipments and Technology </li></ul><ul><li>5. Algorithm used </li></ul><ul><li>6. EEG measurement </li></ul><ul><li>7. Applications </li></ul><ul><li>8. Disadvantages </li></ul><ul><li>9. Conclusions </li></ul><ul><li>10. References </li></ul>
    3. 3. INTRODUCTION <ul><li>Invented by Dr. Farwell </li></ul><ul><li>Proved successful over 170 cases </li></ul><ul><li>Computer based technique that measures recognition of familiar stimuli by measuring electrical brain wave responses to words, phrases, or pictures that are presented on a computer screen </li></ul>
    4. 4. WORKING PRINCIPLE <ul><li>Entire system under computer control includes </li></ul><ul><ul><li>Presentation of the stimuli </li></ul></ul><ul><ul><li>Recording of electrical brain activity </li></ul></ul><ul><ul><li>Determination of &quot;information present&quot; or &quot;information absent,&quot; </li></ul></ul><ul><ul><li>Mathematical data analysis algorithm that compares the responses </li></ul></ul><ul><ul><li>statistical confidence level for the determination. </li></ul></ul>
    5. 5. WORKING PRINCIPLE (Contd.) <ul><li>When someone commits a crime, his brain records it in the memory . </li></ul><ul><li>BFP seeks to reveals that memory, by showing the suspect, evidences taken from the crime scene. </li></ul><ul><li>A head band with EEG sensors is placed on the subject which digitizes brain wave activity and feeds it to the computer. </li></ul>
    6. 6. WORKING PRINCIPLE (Contd .) <ul><li>The computer records the brain waves produced in response to what the subject sees which are called as Event Related Potentials (ERP) </li></ul><ul><li>On seeing familiar info p300,a positive electric voltage is elicited for 300ms by the brain which is recorded as a wave form. </li></ul><ul><li>P300 along with along with other electrically negative components constitutes the MERMER (Memory and Encoding Related Multifaceted Electroencephalographic Response) </li></ul>
    7. 7. WORKING PRINCIPLE (Contd .) <ul><li>By analyzing MERMER the pattern of waves using suitable computer based algorithm, it can be determined if the subject is recognizing what he is seeing. </li></ul><ul><li>Accuracy lies in the ability to differentiate p300 brain wave, before the suspect has time to affect the output. </li></ul>
    8. 8. SCIENTIFIC PROCEDURE <ul><li>Stimulus appears for a fraction of a second when they are presented on a video monitor under computer control. </li></ul><ul><li>Three types of stimuli are presented: </li></ul><ul><li>I ) Targets, </li></ul><ul><li>2 ) Irrelevants, and </li></ul><ul><li>3 ) probes. </li></ul>
    9. 9. SCIENTIFIC PROCEDURE (Contd.) <ul><li>TARGETS stimuli </li></ul><ul><ul><li>Info known to suspect about the crime </li></ul></ul><ul><ul><li>Elicits a MERMER </li></ul></ul><ul><li>IRRELEVANTS stimuli </li></ul><ul><ul><li>Info not related to the crime </li></ul></ul><ul><ul><li>Do not elicit a MERMER </li></ul></ul><ul><li>PROBES stimuli </li></ul><ul><ul><li>Info relevant to the situation under investigation that only the perpetrators knows </li></ul></ul><ul><ul><li>Elicits a MERMER </li></ul></ul>
    10. 10. SCIENTIFIC PROCEDURE (Contd.) <ul><li>Stimuli consists of 1/6 targets, 1/6 probes and 2/3 irrelevents. </li></ul><ul><li>Comparing “Probe” with the “Target” determines if the subject recognizes the Probes </li></ul><ul><li>Comparing the “Probe” with the “Irrelevant” determines if the subject does not recognizes the Probes. </li></ul>
    11. 11. EQUIPMENTS AND TECHNOLOGY <ul><li>The BFP system comprises </li></ul><ul><ul><li>A personal computer </li></ul></ul><ul><ul><li>A data acquisition board </li></ul></ul><ul><ul><li>A graphics card for driving two monitors from one PC </li></ul></ul><ul><ul><li>A 4 channel EEG amplifier system </li></ul></ul><ul><ul><li>Software for data acquisition and analysis </li></ul></ul><ul><ul><li>Electrodes </li></ul></ul>
    13. 13. BLOCK DIAGRAM
    14. 14. ALGORITHM USED <ul><li>Nonparametric statistical method called Bootstrapping compares the responses produced by the stimuli. </li></ul><ul><li>It deduces the distribution of a statistic from a sample </li></ul><ul><li>Determines how reliable that statistic is as a measure for the population. </li></ul>
    15. 15. FLOW CHART
    16. 19. EEG MEASUREMENT <ul><li>Functional activities emerging from the brain is reflected by the variation of the surface potential distribution on the scalp. </li></ul><ul><li>When a stimulus appears, the EEG breaks into a series of larger peaks and troughs which constitutes the ERP </li></ul><ul><li>Voltage difference between a pair of electrodes are measured, filtered, amplified and recorded for analysis. </li></ul>
    17. 20. EEG MEASUREMENT (Contd.)
    18. 21. APPLICATIONS <ul><li>National Security </li></ul><ul><ul><li>Aids in determining who has participated in terrorist acts, directly or indirectly. </li></ul></ul><ul><ul><li>Aids in identifying trained terrorists with the potential to commit future terrorist acts, even if they are in a “sleeper” cell and have not been active for years. </li></ul></ul><ul><li>To test job applicants on the falsification of an application. </li></ul>
    19. 22. APPLICATIONS (Contd.) <ul><li>Medical Field </li></ul><ul><ul><li>Helps in detecting diseases such as Alzheimer's </li></ul></ul><ul><ul><li>Evaluation of the effectiveness of the treatment </li></ul></ul><ul><li>Helps in Identifying false-witnesses </li></ul><ul><li>Successfully predict learning difficulties </li></ul>
    20. 23. APPLICATIONS (Contd.) <ul><li>Advertising area </li></ul><ul><ul><li>What specific information do people retain from advertising </li></ul></ul><ul><ul><li>which element have more impact </li></ul></ul><ul><ul><li>Which type of media is most effective </li></ul></ul><ul><ul><li>What commercial is most effective for a single product </li></ul></ul><ul><li>Criminal Justice </li></ul><ul><ul><li>Improves speed and accuracy </li></ul></ul><ul><ul><li>Reduces time and cost </li></ul></ul>
    21. 24. DISADVANTAGES <ul><li>Not applicable for general screening. </li></ul><ul><li>It does not indicate intent of the crime. </li></ul><ul><li>Takes a fair amount of time to set up and conduct properly . </li></ul><ul><li>Difficult to distinguish the criminal and a witness who saw all the criminal activity happen. </li></ul>
    22. 25. CONSLUSIONS <ul><li>BFP is a new technology which provides high rate accuracy results </li></ul><ul><li>Introduction of this technology, decreases the crime rates in the future to a considerate extend. </li></ul><ul><li>It is fully developed and is available for application in the field. </li></ul>
    23. 26. REFERENCES <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li>http://patft.uspto.govc </li></ul><ul><li> </li></ul>
    24. 27. THANK YOU