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Christopher Thomas's Research
VISOR Lab, York University

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Main

Research

Publications

Reference Documents

Fun Stuff

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Current Projects

The Very Small Array
(Image sensor chips with on-die array optics.)

• Characterization of fabricated sensor arrays.
  
• Optimization of image recovery algorithms for improved monochrome and colour imaging.
• Optimization of image recovery algorithms for improved characterization of monochromatic and polychromatic point sources.

Downloads:

• EI '08 [presentation PDF] (0.4 MB), [poster PDF] (1.5 MB)
  
• EI '07 [presentation PDF] (1.2 MB), [poster PDF] (0.6 MB)
  

Micrite Sensors
(Self-contained sensors under 100 microns in size organized into an ad-hoc sensing network.)

• Proof of concept for sensing, power, and communications implementations.
  

Downloads:

• Literature review [report PDF] (0.2 MB), [slideshow PDF] (0.2 MB)
  
• Dissertation presentation [slideshow PDF] (0.7 MB)
  

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Past Projects

"cif2tribes" Visualization Tool
(Converter that turns integrated circuit layouts into computer game maps.)

• Aids in visualization of 3D structures in integrated circuits.
  
• Introduces students to integrated circuit design concepts in an appealing way.
  
• Presently converts from CIF format to Tribes 2 mission format.
  
• Project web site: http://cif2tribes.sourceforge.net
  

Object Location System Image Sensor Chips
(Object Location System object tracking chips and variants)

• Optimization for low-power operation.
  
• Optimization for extremely high frame rates.
  
• Investigation of methods for accurately distinguishing/tracking multiple objects in the field of view.
  
• Documentation, testing, and characterization of the digital Cumulative Cross-Section chip built by Ryan Burns.
  

JETTY Cache Snoop Filter Devices
(AENAO Group, University of Toronto)

• Assessment of JETTY snoop filter performance with realistic workloads (TPC-C database benchmark).
  
• Optimization of and extensions to inclusive JETTY snoop filter architecture.
  
• Extension of JETTY concept to broadcast suppression in snoop-coherence SMP systems.
  
• Assessment of JETTY snoop filter and broadcast inhibitor performance in CMP systems.
  

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Publications

• "Mitigating Polarization Effects in On-Die Diffractive Optics for a CMOS Image Sensor", Christopher Thomas, Richard I. Hornsey, IS&T/SPIE 20th Annual Symposium on Electronic Imaging Science and Technology, Jan. 2008 [PDF] (0.6 MB)
  
  
• "A diffractive multispectral image sensor with on- and off-die signal processing and on-die optics in 0.18 micron CMOS", Christopher Thomas, Richard I. Hornsey, IS&T/SPIE 19th Annual Symposium on Electronic Imaging Science and Technology, Jan. 2007 [PDF] (0.6 MB)
  
  
• "An image sensor with on-die diffractive optics in 0.18-micron bulk CMOS", Christopher Thomas, Richard I. Hornsey, IS&T/SPIE 18th Annual Symposium on Electronic Imaging Science and Technology, Jan. 2006 [PDF] (0.3 MB)
  
  
• "CMOS Imager Design for Fast Centroid Readout", Christopher Thomas, Mayes Mullins, Paul J. Thomas, Richard Hornsey, Kevin Yip, IEEE Canadian Conference on Electrical and Computer Engineering, 2004 [PDF] (0.2 MB)
  
  
• "Pixel-Parallel CMOS Active Pixel Sensor for Fast Object Location", Ryan Burns, Christopher Thomas, Paul Thomas, Richard Hornsey, SPIE International Symposium on Optical Science and Technology, Aug. 2003 [PDF] (1.5 MB)
  

Thesis Documents

• "Micrite: A Sub-100-Micron Distributd Sensor System", Christopher Thomas, PhD Dissertation, York University, 2011 [PDF] (2.3 MB)
  
  
• "Application of Enhanced JETTY Snoop Filters to Reducing Bus Traffic and Snoop Power in SMP and CMP Systems", Christopher Thomas, MASc Thesis, University of Toronto, 2003 [PS] (2.6 MB)
  

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Main

Research

Publications

Reference Documents

Fun Stuff

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Written by Christopher Thomas. Updated 18 August 2008.