公开(公告)号：EP0308162A2

公开(公告)日：1989-03-22

申请号：EP88308416.2

申请日：1988-09-12

申请人： IDENTIX INCORPORATED

发明人： Sartor, Thomas F. ,  Driscoll, Edward C., Jr.

IPC分类号： A61B5/10 ,  G06K9/00

CPC分类号： G06K9/00046 ,  A61B5/1172

摘要： An optical system for fingerprint imaging utilizing a platen prism (14) and a correction prism (30). The platen prism includes a platen area (18) on one face for receiving a finger to be imaged. Light from a monochromatic light source (22) enters the platen prism through a second face (18) and is totally internally reflected at the platen area surface except in the regions where ridges of the finger directly contact the platen prism. The correction prism (30) receives the light from the platen prism. An objective lens (38) receives the light from the correction prism and forms a fingerprint image on a light detector. The geometry and placement of the correction prism, with respect to the platen prism, are selected to reduce defocussing of the fingerprint image on the detector introduced by the tilting of the platen area with respect to the axis of the objective lens. The light detector (48), typically an area array detector such as a charge coupled device array, provides an output used for fingerprint verification and the like. Preferably, the correction prism, in combination with the platen prism, also provides anamorphic magnification of the fingerprint image thereby permitting the aspect ratio of the image to be controlled. Thus, the image aspect ratio can be selected to match the aspect ratio of the light sensitive cells which form the area array detector.

摘要翻译： 一种用于使用压板棱镜（14）和校正棱镜（30）进行指纹成像的光学系统。 压板棱镜包括在一个面上用于接收待成像的手指的压板区域（18）。 来自单色光源（22）的光通过第二面（18）进入压板棱镜，并且除了手指的脊部直接接触压板棱镜的区域之外，在压板区域表面处完全内部反射。 校正棱镜（30）接收来自压板棱镜的光。 物镜（38）接收来自校正棱镜的光，并在光检测器上形成指纹图像。 选择校正棱镜相对于压板棱镜的几何形状和放置，以减少由于压板区域相对于物镜的轴线的倾斜引起的指纹图像在检测器上的偏聚。 光检测器（48）通常是诸如电荷耦合器件阵列的区域阵列检测器，提供用于指纹验证等的输出。 优选地，校正棱镜与压板棱镜组合还提供指纹图像的变形放大率，从而允许控制图像的纵横比。 因此，可以选择图像宽高比以匹配形成区域阵列检测器的光敏感单元的纵横比。

公开(公告)号：EP0251504A3

公开(公告)日：1989-09-13

申请号：EP87304911.8

申请日：1987-06-03

申请人： IDENTIX INCORPORATED

发明人： Driscoll, Edward C., Jr. ,  Martin, Craig O. ,  Ruby, Kenneth ,  Russell, James J. ,  Watson, John G.

IPC分类号： G07C9/00 ,  G06K9/64

CPC分类号： G06K9/001 ,  G06K9/00067 ,  G06K9/6211 ,  G07C9/00158

摘要： A method and apparatus for verification of personnel identity by correlation of fingerprint images. The method includes the steps of: first enrolling a person by the steps of forming a reference image of a fingerprint of the person, identifying a plurality of reference sections within the reference image, where the image data contained in each of the reference sections is distinct relative to the image data adjacent to and surrounding the reference section, and saving the image data of each of the reference sections; and then verifying the identity of someone claiming to be an enrolled person by the steps of retrieving the image data of the reference sections of the enrolled person, forming a verify image of the fingerprint of the person claiming to be enrolled, where the verify image includes a plurality of verify regions each corresponding in position to one of the reference sections and each larger in extent than its corresponding reference section, determining a best-match location within each verify region at which the image data is most similar to the image data of its corresponding reference section, and verifying the identity of the person claiming to be enrolled according to the degree of similarity between the image data of the best-match locations and the corresponding reference sections and according to the degree of similarity between the relative positioning of the best-match locations and the corresponding reference sections.

公开(公告)号：EP0251504A2

公开(公告)日：1988-01-07

申请号：EP87304911.8

申请日：1987-06-03

申请人： IDENTIX INCORPORATED

发明人： Driscoll, Edward C., Jr. ,  Martin, Craig O. ,  Ruby, Kenneth ,  Russell, James J. ,  Watson, John G.

IPC分类号： G07C9/00 ,  G06K9/64

CPC分类号： G06K9/001 ,  G06K9/00067 ,  G06K9/6211 ,  G07C9/00158

摘要： A method and apparatus for verification of personnel identity by correlation of fingerprint images. The method includes the steps of: first enrolling a person by the steps of forming a reference image of a fingerprint of the person, identifying a plurality of reference sections within the reference image, where the image data contained in each of the reference sections is distinct relative to the image data adjacent to and surrounding the reference section, and saving the image data of each of the reference sections; and then verifying the identity of someone claiming to be an enrolled person by the steps of retrieving the image data of the reference sections of the enrolled person, forming a verify image of the fingerprint of the person claiming to be enrolled, where the verify image includes a plurality of verify regions each corresponding in position to one of the reference sections and each larger in extent than its corresponding reference section, determining a best-match location within each verify region at which the image data is most similar to the image data of its corresponding reference section, and verifying the identity of the person claiming to be enrolled according to the degree of similarity between the image data of the best-match locations and the corresponding reference sections and according to the degree of similarity between the relative positioning of the best-match locations and the corresponding reference sections.

摘要翻译： 一种用于通过指纹图像相关来验证人员身份的方法和装置。 该方法包括以下步骤：首先通过形成人的指纹的参考图像的步骤登记人，识别参考图像内的多个参考部分，其中包含在每个参考部分中的图像数据是不同的 相对于与参考部分相邻并围绕参考部分的图像数据，并且保存每个参考部分的图像数据; 然后通过检索所登记人员的参考部分的图像数据的步骤来验证被声称是登记的人的身份，形成声称被注册的人的指纹的验证图像，其中验证图像包括 多个验证区域，其各自对应于参考部分之一的位置，并且每个在其对应的参考部分中大于其范围，确定每个验证区域内的最佳匹配位置，在该验证区域内图像数据最接近其中的图像数据 相应的参考部分，并且根据最佳匹配位置的图像数据和对应的参考部分之间的相似程度，根据最佳匹配位置的相对位置之间的相似度来验证声称被注册的人的身份 - 匹配位置和相应的参考部分。

公开(公告)号：EP0251504B1

公开(公告)日：1993-11-10

申请号：EP87304911.8

申请日：1987-06-03

申请人： IDENTIX INCORPORATED

发明人： Driscoll, Edward C., Jr. ,  Martin, Craig O. ,  Ruby, Kenneth ,  Russell, James J. ,  Watson, John G.

IPC分类号： G07C9/00 ,  G06K9/64

CPC分类号： G06K9/001 ,  G06K9/00067 ,  G06K9/6211 ,  G07C9/00158

公开(公告)号：EP0308162A3

公开(公告)日：1990-06-06

申请号：EP88308416.2

申请日：1988-09-12

申请人： IDENTIX INCORPORATED

发明人： Sartor, Thomas F. ,  Driscoll, Edward C., Jr.

IPC分类号： A61B5/10 ,  G06K9/00

CPC分类号： G06K9/00046 ,  A61B5/1172

摘要： An optical system for fingerprint imaging utilizing a platen prism (14) and a correction prism (30). The platen prism includes a platen area (18) on one face for receiving a finger to be imaged. Light from a monochromatic light source (22) enters the platen prism through a second face (18) and is totally internally reflected at the platen area surface except in the regions where ridges of the finger directly contact the platen prism. The correction prism (30) receives the light from the platen prism. An objective lens (38) receives the light from the correction prism and forms a fingerprint image on a light detector. The geometry and placement of the correction prism, with respect to the platen prism, are selected to reduce defocussing of the fingerprint image on the detector introduced by the tilting of the platen area with respect to the axis of the objective lens. The light detector (48), typically an area array detector such as a charge coupled device array, provides an output used for fingerprint verification and the like. Preferably, the correction prism, in combination with the platen prism, also provides anamorphic magnification of the fingerprint image thereby permitting the aspect ratio of the image to be controlled. Thus, the image aspect ratio can be selected to match the aspect ratio of the light sensitive cells which form the area array detector.

摘要翻译： 一种用于使用压板棱镜（14）和校正棱镜（30）进行指纹成像的光学系统。 压板棱镜包括在一个面上用于接收待成像的手指的压板区域（18）。 来自单色光源（22）的光通过第二面（18）进入压板棱镜，并且除了手指的脊部直接接触压板棱镜的区域之外，在压板区域表面处完全内部反射。 校正棱镜（30）接收来自压板棱镜的光。 物镜（38）接收来自校正棱镜的光，并在光检测器上形成指纹图像。 选择校正棱镜相对于压板棱镜的几何形状和放置，以减少由于压板区域相对于物镜轴线的倾斜引起的指纹图像在检测器上的偏聚。 光检测器（48）通常是诸如电荷耦合器件阵列的区域阵列检测器，提供用于指纹验证等的输出。 优选地，校正棱镜与压板棱镜组合还提供指纹图像的变形放大率，从而允许控制图像的纵横比。 因此，可以选择图像宽高比以匹配形成区域阵列检测器的光敏感单元的纵横比。