From: chenji@z.eecs.umich.edu (z)
Subject: PhD, EE and Med. Imaging, seek job in image processing, compression
Summary: experienced Ph.D. in image processing, data compression 
Organization: University of Michigan EECS Dept., Ann Arbor
Distribution: usa
Date: Sat, 29 Aug 1992 19:15:30 GMT

                                              1903 Pointe Lane, #203
                                              Ann Arbor, MI 48105

Dear Sir/Madam,

I am looking for a research and development position in image processing,
especially in image data compression.  I have a strong and extensive 
background in image processing, which has been my major research interest 
in the past three years. 

Currently I am working on two projects. One is on the enhancement of digital 
mammograms for digital display and the wavelet regional compression of image 
data. The other is the evaluation of digital image display in the orthopedic 
clinic. 

My Ph.D. dissertation, which was completed last year, dealt with digital 
radiographic data compression. I designed and implemented a novel image 
compression algorithm for high resolution digital radiographs. Clinical 
radiographs were collected to evaluate the effects of image processing. 
I worked with several experienced radiologists in Henry Ford Hospital in
the observer study to collect their subjective views for the statistical
analysis. Several computer platforms, UNIX, VMS, DOS, and Macintosh were
used in the research projects. Programs in C and Fortran written for UNIX
and VMS performed the image processing. DOS and Macintosh computers were
used for observer data collection and statistical analysis.

Working with a resourceful and productive group of medical physics researchers 
in the hospital, I have also gained many experiences through the discussions 
and involvements in the projects of nuclear medicine, MRI, and CT. Also, 
I have extensive software design and development experiences in C, FORTRAN, 
and machine assembly codes. 

My resume is in the following page.  If you have any questions, please
give me a call at (313)-741-1546 or send me an email message to the address
chenji@eecs.umich.edu.  Thank you.

                                             Ji Chen
E-mail Address: chenji@eecs.umich.edu 




                                Ji Chen
1903 Pointe Lane, #203                          Henry Ford Hospital
Ann Arbor, MI 48105                             Diagnostic Radiology Dept.
Phone: (313)-741-1546                           2799 West Grand Blvd.
E-mail Address:                                 Detroit, MI 48202
chen@rad.hfh.edu                                Phone: (313)-876-1603
chenji@eecs.umich.edu                           Fax:   (313)-876-9143

Objective:
A  research  and development position of image processing, transmission
and display.

Qualification
* Extensive experience in image processing and compression, and clinical 
  evaluation since 1989.
* Multifaceted background across a broad  range  of fields such as signal 
  processing,  data  communication,  software development,   computer 
  electronics, image  science,  control theory,  and applied mathematics.
* Excellent academic achievements.

Experience
  Research   Investigator  -  Conduct   research   projects  
  including:  image processing for mammographic image  enhancement  and
  display, wavelet compression of digital radiographs, quantization  of
  digital  radiographs, pattern recognition for calcification detection
  in  mammograms,  and clinical evaluation of digital  image  displays.
  Investigate  X-window based radiographic image viewing  stations  and
  image communication systems.
  
  Research   Assistant  (Medical  Imaging)  -  Developed  and   Applied
  transform  compression methods to digital radiographs. Evaluated  the
  performances  and  effects  of  these methods  in  clinical  setting.
  Conducted observer performance studies to determine the quality of  a
  Kodak  experimental high resolution (46 - 86 mm spot  size,  4096  by
  5120  pixels) film scanner and laser printed films. Managed  MicroVax
  VMS  systems  in the film scanner lab and developed image  processing
  software in both UNIX and VMS platforms with C and FORTRAN.
  
  Research   Intern  -  Conducted  a  comparison  study  of  a   vector
  quantization  and a full frame Discrete Cosine Transform  compression
  methods. Developed a novel technique (byte-splitting) to reduced  the
  ringing effects resulted from the sharp edges of some radiographs.
  
  Research  Assistant  (Signal  Processing)  -  Conducted  research  in
  multidimensional   signal   processing,   information   theory,   and
  estimation  theory,  and investigated the performance  of  radar  and
  sonar arrays for incoming object detection and estimation.
  
  Program  Analyst  -  Designed  and implemented  data  collection  and
  processing  devices  for  auditory hair cell  experiments.   Stimulus
  signals  with  different frequencies and attenuations were  generated
  and  the  hair  cell  responses to these signals were  processed  and
  displayed  simultaneously on a monitor to help determining  the  next
  signal sets. An IBM AT computer with a Tecmar data acquisition  board
  was  used  as the controller and processor. Software programming  was
  done in Microsoft C and Intel 8086 Assembly.
  
  Teaching  Assistant  - Designed and implemented  lab  experiments  of
  logic  circuits  and  micro-computers  for  a  senior/graduate  level
  computer architecture class, and taught the lab sessions.
  
Work History
5/91-Present: Assistant  Staff Investigator, Department  of  Radiology,
              Henry Ford Hospital. (M.J.Flynn, Div. Head)
2/89-5/91:    Research  Assistant,  Department of Radiology, Henry Ford
              Hospital. (M.J.Flynn, Div. Head)
7/89-8/89     Research   Intern, Department of Radiology, Georgetown
              University.
8/87-12/88    Research  Assistant, Department of EECS, the University of
              Michigan.
4/86-7/87     Program Analyst, Kresge Hearing Research Institute, the
              University of Michigan,
9/85-12/86    Teaching Assistant, Department of EECS, the University of
              Michigan.

Academic Summary
Education: Ph.D. in Electrical Engineering, the University of Michigan;
        1991;  Co-chairs: Prof. Michael J. Flynn and  Prof.  Janice  M.
        Jenkins.
1985-91 Dissertation: The Effect of Data Compression on Image Quality
        in High Resolution Digital Chest Radiographs
            A  new  image  compression method  which  incorporates  the
        advantage features of both transform coding and entropy  coding
        has  been developed to meet the needs of picture archiving  and
        communication  systems  (PACS) in  hospitals.  Experiments  and
        statistical   analysis  were  also  done  to   evaluate   human
        sensitivity  to image degradations caused by irreversible  data
        compression.    In   the   experiment,   several    experienced
        radiologists  read  a  set  of paired  images  with  each  pair
        consisting of an original and a compressed image. The  readers'
        responses  varied  in  the  degree of compression,  which  also
        affected  the  difference  image  of  the  original   and   the
        compressed.  Power spectrum were calculated for the  difference
        images  under  varying  degree  of  compression  to  show   the
        characteristics  of errors created by the compression  process.
        The  results  of  the statistical analysis  of  the  subjective
        responses  and  the  error image power spectra  suggested  that
        irreversible  compression can achieve high  compression  ratios
        without altering the image features.
1983-85     M.S.E.  in Electrical Engineering, Department of Electrical
        Engineering  and Computer Science, the University of  Michigan.
        Courses   taken  included  digital  signal  processing,   image
        processing,  data  structure, computer  structure,  information
        theory,  control theory, and optimization theory.  Term  papers
        for  several  courses  were written  on  fast  discrete  cosine
        transforms, minimum entropy methods for speech processing,  and
        rate distortion lower bound for estimators.
1978-82     B.S.E. in Electrical Engineering, South China Institute  of
        Technology,  Canton, China. Thesis work was on the applications
        of  pseudo-random noises in system identification.  Programming
        was  done  for a micro-computer with a Z80 4 MHz  CPU  and  the
        assembly codes were transferred to a single board computer  for
        the  actual  data  collection and processing  to  estimate  the
        system   response   functions.  Senior  courses   included   TV
        engineering and communication.
Publications:"A  Method  for  Splitting Digital Value  in  Radiological
        Image  Compression", Medical physics Journal,  Vol-18,  No.  5,
        1991
          "Effect  of block size on image quality for compressed  chest
        radiographs", SPIE Medical Imaging VI Symposium,  Feb., 1992
           "Observer   Detection   of  Image  Degradation   Caused   by
        Irreversible Data Compression Processes", Proceedings  of  SPIE
        Medical Imaging V Symposium, Feb., 1991.
          "Effect  of  Data  Compression on Digital  Radiography  Image
        Quality",  Scientific Paper Presentation, Radiological  Society
        of North America Annual Meeting, Chicago, Dec.,1991
           "High-Fidelity   Radiographic   Image   Data   Compression",
        Scientific Exhibit, RSNA Annual. Conf., Chicago, Dec., 1991.
          "Digital  Replication of Chest Radiographs  without  Altering
        Diagnostic  Observer Performance", Proceedings of SPIE  Medical
        Imaging V Symposium, Feb., 1991.
           "Replication  of  Chest  Radiographs  with  a  Digital  Film
        Scanner/Printer",  Scientific Paper Presentation,  Radiological
        Society of North America Annual Meeting, Chicago, Dec.,1990.

Hobbies: Competitive sports, photography, travel, and creative hands-on work.