发明名称 |
Two-dimensional code reader |
摘要 |
<p>A two-dimensional code reader for precisely and fast reading a two-dimensional code image containing luminance unevenness caused by variations in illumination, etc. 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. <IMAGE></p> |
申请公布号 |
EP0825547(A2) |
申请公布日期 |
1998.02.25 |
申请号 |
EP19970114582 |
申请日期 |
1997.08.22 |
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):G06K7/14 |
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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