公开(公告)号：DE10239342A1

公开(公告)日：2004-03-11

申请号：DE10239342

申请日：2002-08-28

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： SCHOLZE STEFFEN ,  MEIER REINHARD

IPC: G06T7/00 ,  G06K9/00

Abstract: In a method and an arrangement for assessing the quality of skin print images, and particularly fingerprint images, provision is made for gradients to be formed for the individual picture elements (pixels) of the skin print image, for a mean value to be formed from the gradients of the pixels in one region of the image (tile) at a time, and for similarities in the mean values from tile to tile to form a measure of quality.

公开(公告)号：DE60313041D1

公开(公告)日：2007-05-16

申请号：DE60313041

申请日：2003-12-15

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MEIER REINHARD

IPC: G06K9/00 ,  G06K9/38

Abstract: In a method of binarizing images containing linear structures, and particularly images of prints from the skin, areas are determined that are each distinguished by a preset approximate direction of the structures. The areas of the image that are determined are each filtered with a Gabor filter adapted to the given direction. The method according to the invention can advantageously be implemented into a system for analyzing and binarizing images containing linear structures, and particularly images of prints from the skin. Such systems can advantageously be used for identifying human individuals and are especially intended for access control and the like.

公开(公告)号：DE60305936T2

公开(公告)日：2007-02-01

申请号：DE60305936

申请日：2003-08-20

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： SCHOLZE STEFFEN ,  MEIER REINHARD

IPC: G06K9/00 ,  G06T7/00

Abstract: In a method and an arrangement for assessing the quality of skin print images, and particularly fingerprint images, provision is made for gradients to be formed for the individual picture elements (pixels) of the skin print image, for a mean value to be formed from the gradients of the pixels in one region of the image (tile) at a time, and for similarities in the mean values from tile to tile to form a measure of quality.

公开(公告)号：DE60305936D1

公开(公告)日：2006-07-20

申请号：DE60305936

申请日：2003-08-20

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： SCHOLZE STEFFEN ,  MEIER REINHARD

IPC: G06K9/00 ,  G06T7/00

Abstract: In a method and an arrangement for assessing the quality of skin print images, and particularly fingerprint images, provision is made for gradients to be formed for the individual picture elements (pixels) of the skin print image, for a mean value to be formed from the gradients of the pixels in one region of the image (tile) at a time, and for similarities in the mean values from tile to tile to form a measure of quality.

公开(公告)号：DE10237011A1

公开(公告)日：2004-02-26

申请号：DE10237011

申请日：2002-08-13

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MEIER REINHARD

IPC: G06T3/00 ,  G06K9/00 ,  G06T9/20

Abstract: The method involves encoding one line at a time by vertices, which include a starting point and an end point that are situated on the line, such that connecting line segments between adjacent vertices are no more than a given distance away from the line. A search is made for that point on the line that is the maximum distance away from a connecting line between the starting point and the end point.

公开(公告)号：DE10254327A1

公开(公告)日：2004-06-03

申请号：DE10254327

申请日：2002-11-21

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MEIER REINHARD

IPC: G06K9/00

Abstract: In a method of determining the region of interest in images of skin impressions, the skin having ridges and valleys and the images taking the form of image data, values within a first value range being assigned to the ridges and values within a second value range of the image data being assigned to the valleys, the values of the overall image are shifted in the direction of the first value range. The overall image is split into tiles. Mean values of the shifted values for the individual tiles are compared with a reference value. Those tiles whose mean value deviates relative to the reference value in the direction of the first value range are considered at least on a preliminary basis as belonging to the region of interest.

公开(公告)号：DE60310768T2

公开(公告)日：2007-10-04

申请号：DE60310768

申请日：2003-12-22

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MEIER REINHARD ,  SCHOLZE STEFFEN

IPC: G06K9/00

Abstract: In a method for determining the bearing surface in images of skin prints, the skin having ridges and furrows and the images existing in the form of image data, the image is filtered with a plurality of Gabor filters whose cosine functions are oriented in different directions in the spatial domain. From the filter responses, surfaces are determined that are each distinguished by an approximate direction of the ridges/furrows, which direction is preset by the respective Gabor filter. The surfaces are combined to an overall surface that represents the bearing surface.

公开(公告)号：DE60313041T2

公开(公告)日：2007-08-30

申请号：DE60313041

申请日：2003-12-15

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MEIER REINHARD

IPC: G06K9/00 ,  G06K9/38

Abstract: In a method of binarizing images containing linear structures, and particularly images of prints from the skin, areas are determined that are each distinguished by a preset approximate direction of the structures. The areas of the image that are determined are each filtered with a Gabor filter adapted to the given direction. The method according to the invention can advantageously be implemented into a system for analyzing and binarizing images containing linear structures, and particularly images of prints from the skin. Such systems can advantageously be used for identifying human individuals and are especially intended for access control and the like.

公开(公告)号：DE60310768D1

公开(公告)日：2007-02-08

申请号：DE60310768

申请日：2003-12-22

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MEIER REINHARD ,  SCHOLZE STEFFEN

IPC: G06K9/00

Abstract: In a method for determining the bearing surface in images of skin prints, the skin having ridges and furrows and the images existing in the form of image data, the image is filtered with a plurality of Gabor filters whose cosine functions are oriented in different directions in the spatial domain. From the filter responses, surfaces are determined that are each distinguished by an approximate direction of the ridges/furrows, which direction is preset by the respective Gabor filter. The surfaces are combined to an overall surface that represents the bearing surface.

公开(公告)号：WO2004053790A3

公开(公告)日：2004-08-19

申请号：PCT/IB0305552

申请日：2003-12-02

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  SCHOLZE STEFFEN ,  MEIER REINHARD

Inventor： SCHOLZE STEFFEN ,  MEIER REINHARD

IPC: G06T5/20

CPC classification number: G06T5/20

Abstract: In a method for the Gabor filtration of image signals, following singular value disaggregation of the Gabor filter, filtration is undertaken in the time domain as a one-dimensional convolution. The one-dimensional convolution is preferably undertaken according to the formula (I), wherein B is the filtered signal, A is the signal to be filtered, G is a given Gabor filter, which is an element of a real number matrix of a size m x n with m with a diagonal matrix D whose main diagonal contains the singular values of G,wi is the i-th column vector of a matrix W = DV.

Abstract translation: 在用于图像信号的Gabor滤波的方法中，在Gabor滤波器的奇异值分解之后，在时域中进行过滤作为一维卷积。 一维卷积优选根据公式（1）进行，其中B是滤波后的信号，A是待滤波的信号，G是给定的Gabor滤波器，其是尺寸为实数矩阵的元素 m×n，其中m <= n，ui是矩阵U的第i列向量，其具有奇异值分解G = UDV ，其中对角矩阵D的主对角线包含G的奇异值，wi < T>是矩阵W = DV的第i列向量。