公开(公告)号：US09613287B2

公开(公告)日：2017-04-04

申请号：US14359049

申请日：2012-11-15

Applicant: NEC Corporation

Inventor： Kota Iwamoto ,  Ryota Mase

IPC: G06K9/00 ,  G06K9/46 ,  G06K9/48 ,  G06K9/62

CPC classification number: G06K9/4604 ,  G06K9/4642 ,  G06K9/4671 ,  G06K9/481 ,  G06K9/6247

Abstract: 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.

公开(公告)号：US20160292662A1

公开(公告)日：2016-10-06

申请号：US15035511

申请日：2014-11-11

Applicant: NEC Corporation

Inventor： Jun Kobayashi ,  Eiji Muramatsu ,  Kota Iwamoto ,  Soma Shiraishi ,  Tetsuo Inoshita

IPC: G06Q20/20 ,  H04N5/235 ,  G06K9/20 ,  H04N5/225

Abstract: A POS terminal device capable of improving a recognition rate in a process for recognizing a commodity irrespective of the surrounding environment is provided. A POS terminal device (1) includes a brightness measurement unit (2), an irradiation unit (4), an image pickup unit (6), and a recognition process unit (8). The brightness measurement unit (2) measures the brightness of environmental light around the POS terminal device (1). The irradiation unit (4) irradiates a commodity with light, the light being adjusted according to the brightness of the environmental light measured by the brightness measurement unit (2). The image pickup unit (6) shoots the commodity irradiated with the light by the irradiation unit (4) and thereby generates an image thereof. The recognition process unit (8) performs a process for recognizing the commodity based on the image generated by the shooting performed by the image-pickup unit (6).

Abstract translation: 提供一种能够在不考虑周围环境的情况下提高用于识别商品的处理中的识别率的POS终端装置。 POS终端装置（1）包括亮度测量单元（2），照射单元（4），图像拾取单元（6）和识别处理单元（8）。 亮度测量单元（2）测量POS终端设备（1）周围的环境光的亮度。 照射单元（4）用光照射商品，根据由亮度测量单元（2）测量的环境光的亮度来调节光。 图像拾取单元（6）通过照射单元（4）拍摄用光照射的商品，从而生成其图像。 识别处理单元（8）执行基于由图像拾取单元（6）执行的拍摄生成的图像来识别商品的处理。

公开(公告)号：US20150010237A1

公开(公告)日：2015-01-08

申请号：US14375524

申请日：2013-01-30

Applicant: NEC Corporation

Inventor： Toshiyuki Nomura ,  Akio Yamada ,  Kota Iwamoto ,  Ryota Mase

IPC: G06K9/62 ,  G06F17/30

CPC classification number: G06K9/6232 ,  G06F17/3079 ,  G06F17/30805 ,  G06K9/00771 ,  G06K9/3241 ,  G06K9/4671 ,  G06T7/74 ,  G06T2207/30112 ,  G06T2207/30232

Abstract: A search object and m-number of first local features respectively constituted by a feature vector of 1 to i dimensions of local areas of m-number of feature points in an image of the search object are stored, feature points are extracted from the image, second local features respectively constituted by a feature vector of 1 dimension to j dimensions are generated with respect to local areas of n-number of feature points, a smaller number of dimensions among the number of dimensions i of the first local features and the number of dimensions j of the second local features is selected, and an existence of the search object in the image in the video is recognized when a prescribed ratio of the m-number of first local features up to the selected number of dimensions corresponds to the n-number of second local features up to the selected number of dimensions.

Abstract translation: 搜索对象和m个第一局部特征分别由搜索对象的图像中的特征点的m个数量的局部区域的1到i维度的特征向量组成，从图像中提取特征点， 相对于n个特征点的局部区域产生分别由1维到j维的特征向量构成的第二局部特征，第一局部特征的维数i和维数i中的维数较小， 选择第二局部特征的尺寸j，并且当第一局部特征的m个数量的规定比例直到所选择的维度数量对应于n维时，识别视频中的图像中的搜索对象的存在。 第二个本地功能的数量，直到选定的维度数。

公开(公告)号：US20150003704A1

公开(公告)日：2015-01-01

申请号：US14375452

申请日：2013-01-25

Applicant: NEC Corporation

Inventor： Toshiyuki Nomura ,  Akio Yamada ,  Kota Iwamoto ,  Ryota Mase

IPC: G06K9/62

CPC classification number: G06K9/6232 ,  G06F19/00 ,  G06F19/3418 ,  G06K9/4671 ,  G06K9/52 ,  G06K9/6201 ,  G06K9/6212 ,  G06K2209/057 ,  G16H40/20

Abstract: A medical article and m-number of first local features which are respectively constituted by a feature vector of 1 dimension to i dimensions of m-number of feature points in an image of the medical article are stored in association with each other, n-number of feature points are extracted from an image in a captured video, n-number of second local features respectively constituted by a feature vector of 1 dimension to j dimensions are generated, a smaller number of dimensions among the number of dimensions i and the number of dimensions j is selected, and an existence of the medical article in the image in the video is recognized when it is determined that a prescribed ratio or more of the m-number of first local features up to the selected number of dimensions corresponds to the n-number of second local features up to the selected number of dimensions.

Abstract translation: 医疗用品和m个第一局部特征分别由医疗用品的图像中的特征点的m维数的i维的特征向量相互关联地存储，n个数 从捕获的视频中的图像中提取特征点，生成分别由1维到j维的特征向量分别构成的n个第二局部特征，维数i和数量i之间的维数较小 选择尺寸j，并且当确定直到所选择的维度数量的第一局部特征的m个数量的规定比例或更多的规定比例对应于n时，识别视频中的图像中的医疗用品的存在 - 第二个本地功能的数量，直到选定的维度数。

公开(公告)号：US20140328543A1

公开(公告)日：2014-11-06

申请号：US14359063

申请日：2012-11-15

Applicant: NEC Corporation

Inventor： Kota Iwamoto ,  Ryota Mase

IPC: G06K9/62 ,  G06T7/00 ,  G06K9/46

CPC classification number: G06K9/6202 ,  G06K9/4604 ,  G06K9/4671 ,  G06K9/6247 ,  G06T2207/20021 ,  G06T2207/20112

Abstract: An object of the present invention is to reduce a size of a feature descriptor while maintaining accuracy of object identification. A local feature descriptor extracting apparatus includes: a feature point detecting unit which detects a plurality of feature points in an image and which outputs feature point information that is information regarding each feature point; a feature point selecting unit which selects a prescribed number of feature points in an order of importance from the plurality of detected feature points, based on the feature point information; a local region acquiring unit which acquires a local region corresponding to each selected feature point; a subregion dividing unit which divides each local region into a plurality of subregions; a subregion feature vector generating unit which generates a feature vector of a plurality of dimensions for each subregion in each local region; and a dimension selecting unit which selects a dimension from the feature vector for each subregion so that a correlation between neighboring subregions is lowered, based on a positional relationship between subregions in each local region and which outputs an element of the selected dimension as a feature descriptor of the local region.

Abstract translation: 本发明的目的是在保持对象识别的精度的同时减小特征描述符的大小。 本地特征描述符提取装置包括：特征点检测单元，其检测图像中的多个特征点，并且输出作为关于每个特征点的信息的特征点信息; 特征点选择单元，其基于所述特征点信息，从所述多个检测到的特征点中以重要次序选择规定数量的特征点; 局部区域获取单元，其获取与每个所选特征点相对应的局部区域; 分区单元，其将每个局部区域划分成多个子区域; 子区域特征向量产生单元，其针对每个局部区域中的每个子区域生成多个维度的特征向量; 以及尺寸选择单元，其基于每个局部区域中的子区域之间的位置关系，并且将所选尺寸的元素作为特征描述符输出，从而针对每个子区域从特征向量中选择尺寸，使得相邻子区域之间的相关性降低 的地方。