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Signal processing in barcode reading with a wavelet transformation
Signal processing in barcode reading with a wavelet transformation
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机译:小波变换在条形码读取中的信号处理
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摘要
A method for processing a digital signal obtained in a barcode reading operation comprises a step of applying a wavelet transformation to the digital signal. The noise threshold at each level of the wavelet transformation is determined from a total transfer function in the analogue processing stage, and the coefficients are set to be zero if less than the noise threshold.
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