发明名称 |
Bar-code reader, method of reading a bar code and computer product |
摘要 |
In an optical bar-code reader, an optical scanner (11) optically scans a bar code (1) to obtain optical power of light reflected from white bars and black bars of the bar code (1), a differentiation unit (22) calculates a differential of the optical power to obtain a differential waveform, a dividing unit (23) divides the differential waveform into a positive waveform and a negative waveform, a bar-code correcting unit (24, 25) calculates correct widths of black bars in the bar code from the positive waveform and the negative waveform to create corrected bar-code data, and a converter (28) converts the corrected bar-code data into character data that is an array of numerals and letters. <IMAGE>
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申请公布号 |
EP1450293(A2) |
申请公布日期 |
2004.08.25 |
申请号 |
EP20040250497 |
申请日期 |
2004.01.29 |
申请人 |
FUJITSU LIMITED;FUJITSU FRONTECH LIMITED |
发明人 |
IWAGUCHI, ISAO;MIYAZAWA, HIDEO;WATANABE, MITSUO;YAMAZAKI, KOZO;OHKAWA, MASANORI |
分类号 |
G06K7/00;G06K7/10;G06K7/14;(IPC1-7):G06K7/10 |
主分类号 |
G06K7/00 |
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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