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Restoration of a Bi-level Waveform by Estimation of Edge Locations  

Kim, Jeong-Tae (이화여자대학교 정보통신학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.55, no.7, 2006 , pp. 327-331 More about this Journal
Abstract
We have proposed an image restoration method for a bi-level waveforms whose number of edges is known to us. Based on the information, we parametrize a bi-level waveform using the locations of edges and restore the waveform by estimating the parameter. We estimated the locations by maximizing the correlation coefficients between the hi-level waveform and the measured waveform. In experiments using two dimensional barcode images of the PDF417 specification, the proposed method showed better performance than conventional methods in the sense that the proposed method was able to decode barcode images that were not decoded by the conventional methods.
Keywords
Bi-Level Waveform; Barcode; Deblurring; Restoration; Edge; Optimization;
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