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Bfp final presentation
 

Bfp final presentation

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Bfp final presentation Bfp final presentation Presentation Transcript

    • Presented by
    • LAKSHMY.J
    • Roll no:46
    • S7 CS
    • MACE
    Brain Fingerprinting Technology
  • 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
  • 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
  • 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.
  • 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.
  • 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)
  • 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.
  • 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.
  • 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
  • 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.
  • 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
  • DATA ACQUISITION BOARD
  • BLOCK DIAGRAM
  • 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.
  • FLOW CHART
  •  
  •  
  •  
  • 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.
  • EEG MEASUREMENT (Contd.)
  • 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.
  • 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
  • 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
  • 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.
  • 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.
  • 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/
  • THANK YOU