Software designer with extensive experience creating and implementing algorithms in the areas of image processing, pattern recognition, signal processing, computer vision, and real time systems.
AREAS OF EXPERTISE:
- Extensive experience in algorithm design, image processing, signal processing, and real time embedded systems.
- Excellent mathematical/analytical background including physics and statistics.
- Self-motivated with wide range of experience developing innovative technologies in large and small companies on various platforms using object oriented design and development.
- Software Design Methodology: Object oriented design (OOD) using UML (Unified Modelling Language), software peer review methods, Subversion (SVN) and CVS source code control.
- Languages: C++ (10+ years), C (10+ years), HTML, CSS and HTML (10+ years), Matlab (5+ years), Mathematica (5+ years), Microsoft Windows MFC/Win32 API (3 years), Intel 80x86 assembly language (3 years), FORTRAN 77, 95 (5+ years), Python (5+ years), Perl (2 years), Common Lisp (3 years).
- Systems: Apple Mac (OS X), Pentium PC (Windows 7, XP), Sun SPARCstation (Solaris/UNIX), Mercury RACE PowerPC/Altivec, Motorola VME-167 (VxWorks), VAX 8750 (VMS).
9/06-present: Machine Learning / Image Processing Engineer, Apple Inc., Cupertino.
4/95-9/06: Senior Staff Software Design Engineer, KLA-Tencor, San Jose.
Designed new machine vision and pattern recognition algorithms for automatically detecting defects on semiconductor wafers on optical and SEM inspection systems. Implemented them in C++/C on Windows NT/Pentium PC, Sun Sparc/Solaris and multiprocessor PowerPC platforms.
- Designed a method for reliably and automatically detecting and measuring repeating patterns on Images of semiconductor wafers in the presence of severe noise and obscuring artifacts in the image. Used mathematical methods from image processing, robust statistical analysis and number theory.
- Developed a two class hybrid rule-based and statistical classifier to discriminate between image noise artifacts and real objects at a > 90% success rate. Discovered a method to reduce the size of the training set similar to Wilson editing to improve both the accuracy and speed. Implemented techniques for automatic training of rules and other classifier settings.
- Developed a series of image processing filters to improve image quality in scanning electron microscopy (SEM) Images, including methods to compensate for brightness variation, correction of geometric distortion by graylevel morphological filtering, suppression of random shot and impulse noise, and image low passing and subsampling to increase object signal to noise ratio. Developed default algorithm settings, wrote user manual and trained application engineers in intuitive use of filter settings on customer data.
- Developed an image processing analysis tool for measuring geometric field distortion on Images to monitor and improve performance of SEM and optical imaging systems. Used crosscorrelation, subpixel interpolation, and rigid body point matching.
- Analyzed speed bottlenecks in image processing methods for defect detection and and used methods from graph theory to improve the speed by an order of magnitude.
- Developed a new method for finding the rotation angle of a view relative to the camera using autocorrelation and robust statistical methods.
Designed and implemented new algorithms for automating semiconductor wafer probers in C on a Sun SPARCStation and cross compiled for a real time embedded system running VxWorks.
- Developed a new method for automatically locating and focusing on probe pin positions reliably in the presence of stray reflections and noise. Used a collection of image processing techniques based on adaptive thresholding, morphological noise cleaning, connected components analysis, blob feature analysis, robust centroid computation, and computational geometry.
5/93-4/95: Member of the Technical Staff, Photon Dynamics Inc., Milpitas.
Developed new software to give high accuracy image calibration and registration in real time for an automated flat panel display inspection system. Software was written in C on a Sun workstation running Solaris with extensive firmware programming on Datacube pipelined real time image processing hardware.
- Developed methods for accurately locating calibration target positions from camera Images using fast projection, 1D correlation with 2D correlation fine tuning.
- Developed a reliable and accurate method for automatically focusing the camera in real time based upon adaptive noise thresholding and a modified edge operator with parabolic curve fitting.
- Did a theoretical analysis of the effects of system noise on image gain correction and developed methods to reduce it and speed up performance.
- Designed software for real time image acquisition from digital and analog cameras, working closely with the hardware engineers designing the camera.
9/91-5/93: Senior Engineer, TAU Corporation, Los Gatos.
Developed C software on a real time image processing system for monitoring laser welding. Designed fast algorithms for detecting the laser light and displaying its location graphically.
- Implemented the system on a VME compatible 68040 single board computer with Datacube real time image processing hardware, and controlled by a Sun workstation running X windows under UNIX.
- Wrote the user manual, installed the system and trained the customer.
Designed the C software for an automated PC-based image analysis system for automated strain analysis of materials such as aircraft wings and turbines.
- Designed fast correlation algorithms for comparing the image of a sample to a reference image to measure defects and display their locations graphically.
- Implemented the software on a 80486 PC with a specialized signal processing board, a camera and frame grabber board and a precision motor driven xy platform.
- Built the system, wrote the user manual, installed it, trained the customer, and shipped maintainence updates.
2/81-9/91: Senior Software Engineer, Lockheed-Martin Corporation, Sunnyvale.
10/87-9/91 Communications Systems Analysis Group
Responsible for the software design in a simulation study of a communications system for broadcasting error free Images over satellite links.
- Designed and implemented error correction/detection algorithms using the CRC, Reed-Solomon, BCH and Golay codes to protect Images against burst errors on telephone or satellite links.
- Developed an improved theoretical formula for predicting error correction performance which was verified by simulation.
4/85-10/87 Communications Systems Analysis Group
Designed the image processing and graphics software for a portable PC based system for processing, enhancement and transmission of Images over satellite data links.
- Designed methods for fast image rotations and reflections.
- Designed an algorithm to display satellite Images in false color by combining information from different frequency bands.
- Wrote C and assembly language software for interfacing to image scanners, cameras, image display boards, and image printers.
2/81-4/85 Scientific Software Support Group
- Designed the user interface and graphics software for a topographic map display on a Sun workstation and implemented it in X windows using the C language.
- Designed a computational geometry algorithm for automatic detection and suppression of overlapping graphics objects to automatically declutter the display screen.
- Used the UNIX tools YACC and LEX to write a parser for extracting graphics data from a database.
- Designed an algorithm to automatically lay out connections between graphic symbols for a visual programming language. Designed a method to automatically generate code from the diagram using topological sorting.
- Developed mathematical software for polynomial root finding, numerical Laplace transform inversion, exponential integral and other math library functions.
- Graduate work, partial differential equations, Ph.D. program in Mathematics (6/79 - 6/80), University of California, Berkeley, California.
- B. A. in Mathematics 6/79. G.P.A. 3.7/4.0, University of California, Berkeley, California.
- Minors in Computer Science and Physics.
- Honors: Phi Beta Kappa, Distinction in Scholarship.
CLASSES AND TRAINING COURSES:
- Mercury RACE PowerPC Programming, Mercury Computer Training Course, 2001.
- Introduction to the Java Language, Learnsoft Training Course, 2001.
- Object-Oriented Analysis and Design Using the Unified Modeling Language (UML), Lockheed-Martin Training Course, 1998.
- Software Inspections Using Peer Review, Sandia Labs Training Course, 1998.
- Programming with MFC (Microsoft Foundation Classes) and Visual C++, U. C. Berkeley Extension, 1997.
- Communication engineering courses in the design of error correcting codes, Stanford University, 1990.
- Method for transitioning power states of an electronic device, Filed Dec 29, 2017
- State-based touch threshold, Filed Sep 11, 2017
- Method of optimizing touch detection, Filed Dec 11, 2014
- Method of disambiguating water from a finger touch on a touch sensor panel, Filed Dec 2, 2014
- Coupling correction in capacitive touch panels, Filed Sep 9, 2014
- Low power scan for device wake up and unlock, Filed Aug 28, 2014
- Multiple simultaneous frequency detection, Filed Jul 23, 2013
- ESD detection on a touch input device, Filed Dec 10, 2012
- Detection of low noise frequencies for multiple frequency sensor panel stimulation, Filed Feb 21, 2012
- Combined force and proximity sensing, Filed Jul 14, 2011
- Noise detection in multi-touch sensors, Filed Jan 5, 2010.
- Negative Pixel Compensation, Filed Sep 30, 2009.
- Speed/positional mode translations - Gestures for converting from a position control mode to a motion continuation mode, Filed Jun 13, 2007
- Mathematical software and tutorials published on my web site http://seanerikoconnor.freeservers.com, 1999-present.
- "PC-Based High Accuracy Displacement Field Measurement System", Hassan Mostafavi and Sean O'Connor, 1992.
- "Software for Galois Field Arithmetic and BCH Code Generation", Sean O'Connor, Lockheed Technical Report F-103441, April 1986.