发明名称 |
Two-dimensional code reader |
摘要 |
A two-dimensional code reader for accurate and fast reading of a two-dimensional code image containing luminance unevenness caused by variations in illumination. To binarize cells, first the gray levels of the pixels at the center points of the cells are extracted, a local threshold value is found only from the extracted gray levels, and the gray levels are compared with the local threshold value, thereby binarizing the cells.
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申请公布号 |
US6181839(B1) |
申请公布日期 |
2001.01.30 |
申请号 |
US19990443614 |
申请日期 |
1999.11.18 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KANNON TETSUYA;KOJIMA YOSHIHIRO;INOUE KATSUSHI;KOBAYASHI KEIICHI |
分类号 |
G06K7/00;G06K7/10;G06K7/14;(IPC1-7):G06K7/00 |
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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