发明名称 |
METHOD, APPARATUS, AND PROGRAM FOR URBAN AREA EXTRACTION PROCESSING, AND RECORDING MEDIUM FOR THE PROGRAM |
摘要 |
<P>PROBLEM TO BE SOLVED: To extract an urban area more stably by paying attention to texture features in the urban area when the urban area is automatically extracted from a satellite photographic image, an aerial photographic image, etc. <P>SOLUTION: In an edge vector acquiring process 21, a two-dimensional edge vector having lateral and longitudinal difference values as vector components at each point of an input image 20 is imparted to each pixel and in a block acquiring process 23, a block of local areas including each pixel in the centers is generated. In an outer product sum calculating process 24, the absolute values of the vector outer products are calculated as to all combinations of two of all edge vectors in the block and summed up and in an urban area decision process 26, it is decided whether a representative point in the block is in the urban area according to the sum of vector outer products. <P>COPYRIGHT: (C)2004,JPO |
申请公布号 |
JP2003288592(A) |
申请公布日期 |
2003.10.10 |
申请号 |
JP20020091086 |
申请日期 |
2002.03.28 |
申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
KINEBUCHI TETSUYA;SUZUKI AKIRA;ITO NAOKI;SHIO AKIO |
分类号 |
G01C11/04;G06T1/00;G06T7/00;G06T7/40 |
主分类号 |
G01C11/04 |
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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