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Bfp final presentation

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  • Transcript

    • 1.
      • Presented by
      • LAKSHMY.J
      • Roll no:46
      • S7 CS
      • MACE
      Brain Fingerprinting Technology
    • 2. TOPIC OUTLINE
      • 1. Introduction
      • 2. Working Principle
      • 3. Scientific Procedure
      • 4. Equipments and Technology
      • 5. Algorithm used
      • 6. EEG measurement
      • 7. Applications
      • 8. Disadvantages
      • 9. Conclusions
      • 10. References
    • 3. INTRODUCTION
      • Invented by Dr. Farwell
      • Proved successful over 170 cases
      • 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
    • 4. WORKING PRINCIPLE
      • Entire system under computer control includes
        • Presentation of the stimuli
        • Recording of electrical brain activity
        • Determination of "information present" or "information absent,"
        • Mathematical data analysis algorithm that compares the responses
        • statistical confidence level for the determination.
    • 5. WORKING PRINCIPLE (Contd.)
      • When someone commits a crime, his brain records it in the memory .
      • BFP seeks to reveals that memory, by showing the suspect, evidences taken from the crime scene.
      • A head band with EEG sensors is placed on the subject which digitizes brain wave activity and feeds it to the computer.
    • 6. WORKING PRINCIPLE (Contd .)
      • The computer records the brain waves produced in response to what the subject sees which are called as Event Related Potentials (ERP)
      • On seeing familiar info p300,a positive electric voltage is elicited for 300ms by the brain which is recorded as a wave form.
      • P300 along with along with other electrically negative components constitutes the MERMER (Memory and Encoding Related Multifaceted Electroencephalographic Response)
    • 7. WORKING PRINCIPLE (Contd .)
      • 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.
      • Accuracy lies in the ability to differentiate p300 brain wave, before the suspect has time to affect the output.
    • 8. SCIENTIFIC PROCEDURE
      • Stimulus appears for a fraction of a second when they are presented on a video monitor under computer control.
      • Three types of stimuli are presented:
      • I ) Targets,
      • 2 ) Irrelevants, and
      • 3 ) probes.
    • 9. SCIENTIFIC PROCEDURE (Contd.)
      • TARGETS stimuli
        • Info known to suspect about the crime
        • Elicits a MERMER
      • IRRELEVANTS stimuli
        • Info not related to the crime
        • Do not elicit a MERMER
      • PROBES stimuli
        • Info relevant to the situation under investigation that only the perpetrators knows
        • Elicits a MERMER
    • 10. SCIENTIFIC PROCEDURE (Contd.)
      • Stimuli consists of 1/6 targets, 1/6 probes and 2/3 irrelevents.
      • Comparing “Probe” with the “Target” determines if the subject recognizes the Probes
      • Comparing the “Probe” with the “Irrelevant” determines if the subject does not recognizes the Probes.
    • 11. EQUIPMENTS AND TECHNOLOGY
      • The BFP system comprises
        • A personal computer
        • A data acquisition board
        • A graphics card for driving two monitors from one PC
        • A 4 channel EEG amplifier system
        • Software for data acquisition and analysis
        • Electrodes
    • 12. DATA ACQUISITION BOARD
    • 13. BLOCK DIAGRAM
    • 14. ALGORITHM USED
      • Nonparametric statistical method called Bootstrapping compares the responses produced by the stimuli.
      • It deduces the distribution of a statistic from a sample
      • Determines how reliable that statistic is as a measure for the population.
    • 15. FLOW CHART
    • 16.  
    • 17.  
    • 18.  
    • 19. EEG MEASUREMENT
      • Functional activities emerging from the brain is reflected by the variation of the surface potential distribution on the scalp.
      • When a stimulus appears, the EEG breaks into a series of larger peaks and troughs which constitutes the ERP
      • Voltage difference between a pair of electrodes are measured, filtered, amplified and recorded for analysis.
    • 20. EEG MEASUREMENT (Contd.)
    • 21. APPLICATIONS
      • National Security
        • Aids in determining who has participated in terrorist acts, directly or indirectly.
        • 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.
      • To test job applicants on the falsification of an application.
    • 22. APPLICATIONS (Contd.)
      • Medical Field
        • Helps in detecting diseases such as Alzheimer's
        • Evaluation of the effectiveness of the treatment
      • Helps in Identifying false-witnesses
      • Successfully predict learning difficulties
    • 23. APPLICATIONS (Contd.)
      • Advertising area
        • What specific information do people retain from advertising
        • which element have more impact
        • Which type of media is most effective
        • What commercial is most effective for a single product
      • Criminal Justice
        • Improves speed and accuracy
        • Reduces time and cost
    • 24. DISADVANTAGES
      • Not applicable for general screening.
      • It does not indicate intent of the crime.
      • Takes a fair amount of time to set up and conduct properly .
      • Difficult to distinguish the criminal and a witness who saw all the criminal activity happen.
    • 25. CONSLUSIONS
      • BFP is a new technology which provides high rate accuracy results
      • Introduction of this technology, decreases the crime rates in the future to a considerate extend.
      • It is fully developed and is available for application in the field.
    • 26. REFERENCES
      • http://www.brainwavescience.com/
      • http://en.wikipedia.org/wiki/Brain_fingerprinting
      • http://www.scribd.com/doc/20835999/Brain-Fingerprinting-Report
      • http://www.slideshare.net/singhgarima/brain-finger-printing-2128593
      • http://patft.uspto.govc
      • http://www.encyclopedia.com/
    • 27. THANK YOU