发明名称 |
LOCAL FEATURE DESCRIPTOR EXTRACTING APPARATUS, METHOD FOR EXTRACTING LOCAL FEATURE DESCRIPTOR, AND PROGRAM |
摘要 |
The size of a feature descriptor is reduced with the accuracy of object identification maintained. A local feature descriptor extracting apparatus includes a feature point detecting unit configured to detect feature points in an image, a local region acquiring unit configured to acquire a local region for each of the feature points, a subregion dividing unit configured to divide each local region into a plurality of subregions, a subregion feature vector generating unit configured to generate a feature vector with a plurality of dimensions for each of the subregions in each local region, and a dimension selecting unit configured to select dimensions from the feature vector in each subregion so as to reduce a correlation between the feature vectors in proximate subregions based on positional relations among the subregions in each local region and output elements of the selected dimensions as a feature descriptor of the local region. |
申请公布号 |
US2014321755(A1) |
申请公布日期 |
2014.10.30 |
申请号 |
US201214359049 |
申请日期 |
2012.11.15 |
申请人 |
NEC Corporation |
发明人 |
Iwamoto Kota;Mase Ryota |
分类号 |
G06K9/46;G06K9/48 |
主分类号 |
G06K9/46 |
代理机构 |
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代理人 |
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主权项 |
1. A local feature descriptor extracting apparatus comprising:
a feature point detecting unit configured to detect feature points in an image; a first local region acquiring unit configured to acquire a local region for each of the feature points; a first subregion dividing unit configured to divide each local region into a plurality of subregions; a first subregion feature vector generating unit configured to generate a feature vector with a plurality of dimensions for each of the subregions in each local region; and a dimension selecting unit configured to select dimensions from the feature vector in each subregion so as to reduce a correlation between proximate subregions based on positional relations among the subregions in each local region and output elements of the selected dimensions as a feature descriptor of the local region. |
地址 |
Tokyo JP |