发明名称 |
Signal processing in barcode reading with a wavelet transformation |
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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申请公布号 |
US2007086670(A1) |
申请公布日期 |
2007.04.19 |
申请号 |
US20050253013 |
申请日期 |
2005.10.18 |
申请人 |
HAYAKAWA HIROSHI;NAKANO SUSUMU;TAKAHASHI KENTARO |
发明人 |
HAYAKAWA HIROSHI;NAKANO SUSUMU;TAKAHASHI KENTARO |
分类号 |
G06K9/40;G06K7/10;G06K9/36 |
主分类号 |
G06K9/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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