Transcript REFACTORING A KEYSTROKE BIOMETRIC SYSTEM SeethaRam Janapala, Shiladitya Roy, Jackson John, Luca Columbu, Joseph Carrozza, Robert Zack, and Charles Tappert.

REFACTORING A
KEYSTROKE BIOMETRIC
SYSTEM
SeethaRam Janapala, Shiladitya Roy, Jackson John, Luca
Columbu, Joseph Carrozza, Robert Zack, and Charles Tappert
Biometric Authentication System
(BAS)
Bio Feature Extractor
Biometric Authentication System
(BAS)
BAS Accuracy Calculator
BAS Accuracy Calculator
BAS Accuracy Calculator
Refactoring Objectives
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Fix errors and warnings in the code.
Remove deprecated elements and replace with
supported ones.
Conform to coding standards.
Rewrite memory management components to
support large data sets.
Improve system performance.
Enable applications to run standalone without an
IDE.
Completed Tasks
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Modified code to efficiently use threads,
collections, files, and buffering techniques to
improve the system speed, manage the memory,
and avoid OutOfMemory errors.
Now the system uses only 60MB-120MB memory
and less CPU allowing the user to run the system in
the background and continue his/her work.
Completed Tasks
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Preserve dichotomy data so subsequent runs did not
need to re-dichotomize.
Changed BAS defaults to support odd valued NN’s.
Removed all unnecessary buttons to save
dichotomy data as we are already storing the data
by default.
Completed Tasks
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Parameterized the 'lowest N choices' for test results
which can be used for larger nearest neighbor
choice.
Converted Perl and Python scripts to Java.
Added error handling and improved logging.
Results saved in HTML format.