[Amath-seminars] Boeing Distinguished lecture - Fadil Santosa, Thursday Feb. 3

Eli Shlizerman shlizee at uw.edu
Tue Feb 1 15:57:30 PST 2011

Dear all,

This Thursday Fadil Santosa from the University of Minnesota and IMA will
give the Boeing Distinguished lecture. See you there!

*Boeing Distinguished Lecture Series*

*Fadil Santosa*,
Professor of Mathematics, School of Mathematics, University of Minnesota
Director, Institute for Mathematics and its Applications

Title: *An inverse problem arising in bar code scanning*

Thursday, February 3, 2011
220 Guggenheim, 4:00 pm
(Reception to follow on 4th floor of Guggenheim)

Information encoded in a bar code can be read using a laser scanner or a
camera-based scanner. For one-dimensional bar codes, which are in most
prevalent use, the information that needs to be extracted are the widths of
the black and white bars. The collection of black and white bars may be
viewed as a binary one-dimensional image. The signal measured at the scanner
amounts to the convolution of the binary image with a smoothing kernel. The
challenge is that the smoothing kernel, in addition to the binary image, is
also unknown. This presentation will review the technology behind bar code
scanning and present several approaches to the decoding problem.
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