发明名称 |
Apparatus for distinguishing between different areas of an image. |
摘要 |
An image area determining apparatus acquires a multi-value image to determine to which one of a picture area and a character area an image signal of the multi-value image belongs. A density detecting unit detects whether or not a density value of the multi-value image is within a range between two preset density threshold values. A density variation amount detecting unit detects whether or not a variation amount of the density value of the multi-value image is less than a preset density variation threshold value. The determining apparatus determines that the multi-value image is related to a picture area when the density value of the received multi-value image is within the range between the two density threshold values and the density value variation amount of the multi-value image is less than the density variation threshold value. <IMAGE> |
申请公布号 |
EP0501450(A2) |
申请公布日期 |
1992.09.02 |
申请号 |
EP19920103265 |
申请日期 |
1992.02.26 |
申请人 |
NEC CORPORATION |
发明人 |
SUGIURA, MASASHI;TAKASHIMA, YOSUKE |
分类号 |
G06T7/40;H04N1/40 |
主分类号 |
G06T7/40 |
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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