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Yifei Lou, Ernie Esser, Jack Xin Barcode Recognition UCI iCAMP 2012.
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Slide 1
Yifei Lou, Ernie Esser, Jack Xin Barcode Recognition UCI iCAMP 2012
Slide 2
Slide 3
Different types of barcodes? UPC-A EAN-13 QR code
Slide 4
UPC-As anatomy ~ 1 trillion (10^12) different barcodes
Slide 5
UPC-A encoding It encodes information in the relative widths of the bars
Slide 6
Codebook
Slide 7
Barcode scanner/reader Laser scanner Imaging scanner
Slide 8
Image acquisition Pre-processingDecoding 12589-34706
Slide 9
Image deblurring Barcode Ideal signal Obtained signal
Slide 10
Image formation model Ideal signalObtained signal Electrical noise, source defects, etc
Slide 11
An inverse problem: find u given y Non-blind: the kernel G is known Partially blind: Gaussian kernel with unknown width Blind: the kernel G is unknown
Slide 12
Weekly agenda Week 1: introduction to barcode Week 2-3: non-blind solutions Week 4-5: blind deblurring algorithms Week 6-7: collect real world data with cell phones Week 8: summarize results, write up presentation.
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