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    • 5. 发明申请
    • IMAGE MATCHING DEVICE
    • 图像匹配装置
    • US20130216106A1
    • 2013-08-22
    • US13882645
    • 2011-11-02
    • Masanori HaraNina Sato
    • Masanori HaraNina Sato
    • G06K9/00
    • G06K9/001G06K9/00067G06K9/036
    • A feature-point matching unit calculates a first matching score between first and second biological patterns, based on: first and second feature-point data indicating first and second feature-point sets of first and second ridge patterns included in first and second images of first and second biological patterns respectively, and generates a corresponding feature-point list by extracting a corresponding feature-point set being a set of corresponding feature-points between the first and second feature point sets. A non-linear image conversion unit performs a first non-linear conversion making the first image approximate to the second based on the corresponding feature-point list. A feature point matching unit calculates a second matching score between the first and second biological patterns based on the first image after the first non-linear image conversion and the second. A high matching accuracy is achieved in fingerprint or palmprint matching using a low-quality image.
    • 特征点匹配单元基于:第一和第二特征点数据来计算第一和第二生物图案之间的第一匹配分数,第一和第二特征点数据指示包括在第一和第二图像的第一和第二图像中的第一和第二脊图案的第一和第二特征点集合 和第二生物模式,并且通过提取对应的特征点集合来生成对应的特征点集合,所述相应特征点集合是第一和第二特征点集合之间的对应特征点的集合。 非线性图像转换单元基于对应的特征点列表执行使第一图像接近第二图像的第一非线性转换。 特征点匹配单元基于第一非线性图像转换之后的第一图像和第二图像转换来计算第一和第二生物图案之间的第二匹配分数。 在使用低质量图像的指纹或掌纹匹配中实现高匹配精度。
    • 6. 发明申请
    • IMAGE PROCESSING APPARATUS
    • 图像处理设备
    • US20130051636A1
    • 2013-02-28
    • US13574198
    • 2010-12-21
    • Masanori HaraHiroaki Toyama
    • Masanori HaraHiroaki Toyama
    • G06K9/00
    • G06T5/003G06K9/00067G06T2207/20192
    • An image processing apparatus includes: a data storage section configured to store image data as a density image containing a fingerprint or a palm print and ridge pattern direction distribution data which shows a direction distribution of a ridge pattern in a fingerprint or a palm print; a direction usage image enhancing section configured to execute ridge direction usage image enhancement processing on the density image based on the ridge pattern direction distribution data; and a direction extracting section configured to extract a first direction distribution of a first pattern which is contained in a ridge direction usage image enhanced image, from the ridge direction usage image enhanced image as a result of the ridge direction usage image enhancement processing to the density image. The direction usage image enhancing section executes first direction usage image enhancement processing on the density image based on first direction distribution data which shows a first direction distribution.
    • 一种图像处理装置,包括:数据存储部,被配置为将图像数据存储为包含指纹或掌纹的浓度图像,以及脊图形方向分布数据,其显示指纹或掌纹中的脊图案的方向分布; 方向使用图像增强部,被配置为基于所述脊图案方向分布数据对所述浓度图像执行脊线方向使用图像增强处理; 以及方向提取部,被配置为从作为脊方向使用图像增强处理的结果的脊线方向使用图像增强图像中提取包含在脊线方向使用图像增强图像中的第一图案的第一方向分布, 图片。 方向使用图像增强部基于表示第一方向分布的第一方向分布数据对密度图像执行第一方向使用图像增强处理。
    • 8. 发明申请
    • PATTERN NOISE REMOVAL DEVICE, PATTERN NOISE REMOVAL METHOD, AND PATTERN NOISE REMOVAL PROGRAM
    • 图案噪声去除装置,图案噪声去除方法和图案噪声消除程序
    • US20120057797A1
    • 2012-03-08
    • US13321065
    • 2010-05-19
    • Masanori Hara
    • Masanori Hara
    • G06K9/40G06K9/46G06K9/56
    • G06T5/002G06K9/00067G06K9/40G06T5/20
    • Disclosed is a pattern noise removal device for removing background pattern noise having periodicity from a digital image, which includes a candidate pixel extracting module for extracting candidate pixels that constitute the background pattern noise from the pixels in the image on the bases of the concentration of each of the pixels, a dot pattern feature extracting module for extracting the feature of a dot pattern formed by each of the candidate pixels and the peripheral neighborhood pixels among the extracted candidate pixels, a dot pattern area extracting module for extracting a dot pattern area including the candidate pixels of the periodicity and the neighborhood pixels, which have the feature of the dot pattern, and a periodic pattern noise removal module for removing the candidate pixels of the periodicity and the neighborhood pixels, which are included in the dot pattern area, as the background pattern noise.
    • 公开了一种用于从数字图像中去除具有周期性的背景图案噪声的图案噪声去除装置,其包括候选像素提取模块,用于基于每个图像的浓度从图像中的像素中提取构成背景图案噪声的候选像素 的点图案特征提取模块,用于提取由所提取的候选像素中的每个候选像素和外围邻域像素形成的点图案的特征;点阵图区域提取模块,用于提取包括 具有点图案的特征的周期性的候选像素和相邻像素,以及用于将包括在点图案区域中的周期性的候选像素和邻近像素的周期性图案噪声去除模块作为 背景图案噪音。
    • 9. 发明申请
    • LINE NOISE ELIMINATING APPARATUS, LINE NOISE ELIMINATING METHOD, AND LINE NOISE ELIMINATING PROGRAM
    • 线噪声消除装置,线噪声消除方法和线噪声消除程序
    • US20080031531A1
    • 2008-02-07
    • US11833165
    • 2007-08-02
    • Masanori Hara
    • Masanori Hara
    • G06K9/36G06K9/40
    • G06K9/0008G06K9/346
    • To provide a line noise eliminating apparatus and the like, with which the picture quality of the area that has no line noise is not deteriorated, and a line noise having no periodicity can be eliminated. The line noise eliminating apparatus includes: an image binarizing device which generates a binary image by an input image; a line noise reliability calculating device which calculates an edge feature quantity for each of black-pixel consecutive areas in the rotated images, and calculates line noise reliability based on the edge feature quantities; a line noise area determining device which determines the line noise areas that correspond to each of the rotation angle candidates based on the line noise reliability; a density converting device which generates a density-converted image by applying local image enhancement on an area that corresponds to the line noise area of the input image so as to generate a density-converted image.
    • 为了提供没有线噪声的区域的图像质量不劣化的线路噪声消除装置等,并且可以消除不具有周期性的线路噪声。 线路噪声消除装置包括:图像二值化装置,其通过输入图像生成二值图像; 线噪声可靠性计算装置,其计算旋转图像中的每个黑像素连续区域的边缘特征量,并且基于边缘特征量计算线噪声可靠性; 线路噪声区域确定装置,其基于线路噪声可靠性确定与每个旋转角度候选对应的线路噪声区域; 密度转换装置,其通过对与输入图像的线路噪声区域对应的区域应用局部图像增强来生成密度转换图像,以便生成密度转换图像。
    • 10. 发明申请
    • Ridge direction extraction device, ridge direction extraction method, ridge direction extraction program
    • 脊方向提取装置,脊方向提取方法,脊方向提取方案
    • US20070047784A1
    • 2007-03-01
    • US11501874
    • 2006-08-10
    • Masanori Hara
    • Masanori Hara
    • G06K9/00
    • G06K9/0008
    • A ridge direction extraction device capable of extracting ridge directions accurately even in direction unstable areas is provided. In the ridge direction extraction device, a zone direction extractor calculates ridge directions and direction confidence of each zone, and a high confidence zone area determiner determines a high confidence zone area. A direction expectation calculator selects a propagation candidate zone and a reference zone, and calculates direction expectation of the ridge direction of the propagation candidate zone based on the ridge direction and distance of the reference zone. A propagation zone direction extractor recalculates the direction confidence calculated by the zone direction extractor based on the direction expectation of each propagation candidate zone, and extracts the ridge direction of a propagation candidate zone based on the direction confidence recalculated.
    • 提供了即使在方向不稳定区域也能够准确地提取脊方向的脊方向提取装置。 在脊方向提取装置中,区域方向提取器计算每个区域的脊方向和方向置信度,并且高置信区域确定器确定高置信区域。 方向期望计算器选择传播候选区域和参考区域,并且基于参考区域的脊方向和距离来计算传播候选区域的脊方向的方向期望。 传播区方向提取器基于每个传播候选区域的方向期望重新计算由区域方向提取器计算的方向置信度,并且基于重新计算的方向置信度来提取传播候选区域的脊方向。