# US 7,609,865 B2 · 3D fingerprint and palm print data model and capture devices using multi structured lights and cameras > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,865 B2 - Document ID: US7609865B2 - Status: Granted - Kind: B2 - Application number: 11/269,312 - Filed: 2005-11-08 - Published: 2006-06-08 - Granted: 2009-10-27 - Earliest claimed: 2004-11-08 - Assignees: Biomagnetics - Inventors: Feng Chen - Web page: https://patentgrep.com/patent/US7609865B2 ## CPC - G06V 40/1312: {direct reading, e.g. contactless acquisition} - G06V 10/145: Illumination specially adapted for pattern recognition, e.g. using gratings - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A method and system for biometric identification utilizes structured light (e.g., fine grid) that is projected to the target objects (fingers and palm). The image with structured light on the object contours can give 3D information of the objects with resolution to satisfy NIST fingerprint standard. In embodiments, the structured light can be of different color, to reduce the burden of the software processing. To enhance the capture speed, a model with 2D image on “smooth” 3D surface can be used. In this “2.5-D” case, the finest feature of the structured light can be as big as millimeter size. Although grid-structured light can satisfy current requirement of fingerprint and palm print capture standards, in other embodiments, a customized structure based on the initial scan result can give optimal result on the 3D data. This may be useful when higher resolution is desired. ## Claims ### Claim 1 A system for determining a biometric feature, comprising: (a) a light source emitting a structured light on an object having the biometric feature; (b) a recorder configured to capture an image of the object in a digital form; and (c) a processor that produces a data set representative of a surface of the object by analyzing the topological deformations in the captured image, the data set including x-coordinates, y-coordinates, and one of (i) grayscale, and (ii) texture. ### Claim 2 (depends on 1) The system of claim 1 wherein the data set is stored in one of (i) a 3D surface, and (ii) smoothed 3D surface with texture. ### Claim 3 (depends on 1) The system of claim 1 wherein the structured light has a form selected from one of (i) a grid, and (ii) a web. ### Claim 4 (depends on 1) The system of claim 1 wherein the light source emits the structured light and an illuminating light; and wherein the processor includes instructions for differentiating a part due to the structured light and a part due to the illuminating light. ### Claim 5 (depends on 1) The system of claim 1 wherein the recorder includes at least one camera. ### Claim 6 (depends on 1) The system of claim 1 wherein the recorder captures images from a plurality of angles. ### Claim 7 (depends on 1) The system of claim 1 wherein the light source, recorder and the processor cooperate to capture a plurality of images substantially simultaneously. ### Claim 8 A method for determining a biometric feature, comprising: (a) illuminating an object having the biometric feature with a light source; (b) capturing an image of the illuminated object in a digital form; and (c) processing the image with a processor to produce a digital representation of the object wherein topological variations in the digital image are recorded in x-coordinates, y-coordinates and grayscale; and (d) constructing a database using the image. ### Claim 9 (depends on 8) The method of claim 8 wherein the light source emits a structured light. ### Claim 10 (depends on 8) The method of claim 8 wherein the recorder includes at least one camera. ### Claim 11 (depends on 8) The method of claim 8 wherein the recorder captures images from a plurality of angles. ### Claim 12 (depends on 8) The method of claim 8 wherein the light source illuminates the object with a grid and the processor records the topological deformities of the grid in grayscale. ### Claim 13 (depends on 8) The method of claim 8 wherein the illuminating uses a structured light and an illuminating light; and further comprising differentiating a part due to the structured light and a part due to the illuminating light while processing the image. ### Claim 14 A method for preserving information relating to a biometric feature, comprising: illuminating an object having the biometric feature with a light source; capturing an image of the illuminated object in a digital form with a digital camera; processing the image with a processor to produce a 2.5 D data set, wherein the 2.5 D data set includes an X coordinate, a Y-coordinate, and one of (i) grayscale, and (ii) texture; and constructing a database using the 2.5 D data set. ### Claim 15 (depends on 14) The method of claim 14 wherein the image is captured from a plurality of angles. ### Claim 16 (depends on 14) The method of claim 14 wherein the illuminating uses a structured light and an illuminating light; and further comprising differentiating a part due to the structured light and a part due to the illuminating light while processing the image. ### Claim 17 (depends on 14) The method of claim 14 wherein the texture is a relative vertical distance. ### Claim 18 (depends on 14) The method of claim 14 wherein the grayscale replaces a height value.