发明名称 |
IMAGE PROCESSING DEVICE |
摘要 |
An image processing device capable of processing images containing poorly contrasted letters and/or bold letters in addition to well contrasted letters and pictures such that both resolutions of letters and tones of pictures can be preserved. The device may include a circuit (3, 4) to distinguish two level images from non two level images according to image concentration related quantity, and a circuit (2) to distinguish picture images out of non two level images according to another image concentration related quantity. The device may include a circuit (2) to distinguish letters from pictures according to the maximum and the minimum values of the image concentration related quantity. The device may include a circuit to distinguish letters from pictures according to the maximum and the minimum values of changes in the image concentration related quantity. The device may include a circuit to distinguish letters from pictures according to the square sum average of differences in the image concentration related quantity between neighboring picture elements. |
申请公布号 |
EP0318950(A3) |
申请公布日期 |
1991.07.03 |
申请号 |
EP19880119973 |
申请日期 |
1988.11.30 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
YONEDA, HIOTSHI;MACHIDA, HIRONOBU;KANNO, HIROKI;IZAWA, KOJI |
分类号 |
G06T5/00;(IPC1-7):G06F15/68 |
主分类号 |
G06T5/00 |
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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