Venu Govindaraju

1
Pattern Analysis and Machine Intelligence
Applications

• Venu Govindaraju
• Dept. of Computer Science Engineering
• University at Buffalo
• govind_at_cse.buffalo.edu

2
Research Projects

• Document Image Analysis and Recognition
• Interactive Recognition NSF 2003-04
• Digital Libraries NSF 2002-04
• Public Health Surveillance NSF 2003-04

• Unified Biometrics and Sensors
• Biometric Systems NYSTAR 2003-0
• Fingerprint Recognition Ultra-Scan Inc 2002-04
• Hand Geometry Infinite Group Inc 2003-04
• Cancelable Biometrics CUBRC 2003-04
• Patho-biometrics AFMIC 2003-04

3
Document Analysis and Recognition
Goal Everything that can be done with
symbolically encoded data can also be done with
scanned hardcopy documents.   Searching document
images, presenting them legibly, navigating
within and among them.
4
I Interactive Recognition Models
Ranked Lexicon
Context
PhD Student Vemulapati Ramanaprasad
5
I Interactive Recognition Models
Ranked Lexicon
Context
6
Grapheme Models
7
Structural Features, BAG
Loops
End
Junction
End
Loop
Turns
8
Continuous Attributes
grapheme pos orientation angle
Down cusp 3.0 -90o
Up loop
Down arc
9
II Multilingual Digital Libraries

• South Asian Languages
• Hindi (Devanagari script), Urdu (Arabic Script),
  Telugu
• Covers a billion people!
• Script discrimination
• Multilingual querying

PhD Students Faisal Farooq, Surya Kompalli
10
Digital Library application
OCR design
Semi-Automatic Annotation
Script Analysis
Multilingual Digital Archives
11
II Public Health Surveillance

• Thousands are filed a day.
• Passed from EMS to Hospital.
• PCR Purpose
• Medical care/diagnosis
• Legal Documentation
• Quality Assurance
• EMS Abbreviations
• COPD Chronic Obstructive Pulmonary Disease
• CHF Congestive Heart Failure
• D/S Dextrose in Saline
• PID Pelvic Inflammatory Disease
• GSW Gunshot Wound
• NKA No known allergies
• KVO Keep vein open
• NaCL Sodium Chloride

PhD Student Robert Milewski
12
Medical Text Recognition and Data Mining
Check box recognition, Numeral recognition Large
lexicons, partial recognition, abbreviations Chro
nic Obstructive Pulmonary Disease
CRC-OBV-UOARY-DISAE Contextual knowledge,
constraints and lexicon reduction
13
Unified Biometrics and Sensors
Biometrics are automated methods of identifying a
person or verifying the identity of a person
based on a physiological or behavioral
characteristic.
14
I UB STARS Unobtrusive Biometric Sense Transmit
Assess and Respond Systems
15
II. Fingerprint Analysis and Recognition
PhD Students Tsai-yang Jea, Chaohong Wu
16
Partial matching
?
Latent partial fingerprints
17
III Hand Geometry
Hand geometry biometrics and fingerprints
18
IV Cancelable Biometrics

• Intentional, repeatable distortion of biometric
  signal based on a chosen transform
• One-way non-invertible mapping using another
  biometric data giving layered security
• Transform minutiae points on fingerprints using
  signature features

PhD Student Sergey Tulyakov
19
V Animal Biometrics

• Visible Symptoms of FMD
• Straying from the herd
• Swaying gait, sometimes with high stepping of the
  feet
• Difficulties in walking or getting up
• Loss of weight, milk yield

20
Texture Analysis
21
Other Projects

• Signature Verification
• HanSheng Lei (PhD) Srinivas Palla (MS)
• Devanagari OCR
• Swapnil Khedekar (MS)
• Biometric Data Representation
• Viraj Chavan (MS)
• Web Security and CAPTCHA
• Sumit Manocha (MS)
• Video HWR
• Sijun Kung (PhD)