发明名称 |
Encoded symbol reader which determines the uniformity of brightness of the background image |
摘要 |
In an encoded symbol that is read by an encoded symbol reader, an image of the encoded symbol is read and a ratio of a minimum and maximum values of the electrical signals corresponding to the image is determined. If the ratio is larger than a predetermined value, the brightness of the image is determined to be uniform.
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申请公布号 |
US5621202(A) |
申请公布日期 |
1997.04.15 |
申请号 |
US19950404997 |
申请日期 |
1995.03.16 |
申请人 |
ASHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
AOKI, HARUMI |
分类号 |
G06K7/10;G06K7/14;(IPC1-7):G06K7/10 |
主分类号 |
G06K7/10 |
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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