# US 10,372,973 B2 · Biometric identification > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,372,973 B2 - Document ID: US10372973B2 - Status: Granted - Kind: B2 - Application number: 15/321,379 - Filed: 2015-06-05 - Published: 2017-06-08 - Granted: 2019-08-06 - Earliest claimed: 2014-06-23 - Assignees: British Telecommunications public limited company - Applicants: British Telecommunications Public Limited Company - Inventors: Andrew Gordon Davis; Simon Giles Thompson - Web page: https://patentgrep.com/patent/US10372973B2 ## CPC - G06V 10/993: {Evaluation of the quality of the acquired pattern} - G06V 10/141: Control of illumination - G06V 40/161: {Detection; Localisation; Normalisation} - G06V 40/168: {Feature extraction; Face representation} - G06V 40/172: {Classification, e.g. identification} - G06F 9/451: Execution arrangements for user interfaces - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract This invention provides a method of face recognition and a device for implementing said method, the method comprising the steps of: (a) performing a face recognition algorithm on an image of a user to determine an identity of the user, the image having an illumination level; (b) determining if a reliability measurement of the identity of the user determined by the face recognition algorithm meets a threshold indicating reliable identification and, if the reliability measurement is below the threshold indicating reliable identification; (c) receiving a new image of the user, the new image having an adjusted illumination level; and (d) performing a further face recognition algorithm on the new image of the user to determine the identity of the user. ## Claims ### Claim 1 A method of face recognition, the method comprising the steps of: (a) performing an initial face recognition algorithm on an initial image of a user to determine the identity of the user including performing a matching process of the initial image of the user with one or more stored images of the user, the initial image having an initial illumination level; (b) determining if a reliability measurement of the identity of the user determined by the initial face recognition algorithm meets a first threshold, the first threshold indicating possible identification and, if the reliability measurement is above the first threshold indicating possible identification; (c) performing a face recognition algorithm on an image of a user to determine an identity of the user, the image having an illumination level; (d) determining if a reliability measurement of the identity of the user determined by the face recognition algorithm meets a second threshold, the second threshold indicating reliable identification and, if the reliability measurement is below the second threshold indicating reliable identification; (e) receiving a new image of the user, the new image having an adjusted illumination level; and (f) performing a further face recognition algorithm on the new image of the user to determine the identity of the user. ### Claim 2 (depends on 1) A method as claimed in claim 1, further comprising the steps of: (g) determining if a reliability measurement of the identity of the user determined by the further face recognition algorithm meets the second threshold indicating reliable identification and, if the reliability measurement is below the second threshold indicating reliable identification, repeating steps (e) and (f). ### Claim 3 (depends on 2) A method as claimed in claim 2, wherein steps (e), (f) and (g) are repeated iteratively. ### Claim 4 (depends on 1) A method as claimed in claim 1, for face recognition on an interactive terminal having a screen, wherein, if the reliability measurement is above the second threshold indicating reliable identification, the method further comprises the steps of: personalizing the interactive terminal's screen for the user. ### Claim 5 (depends on 4) A method as claimed in claim 4, wherein the interactive terminal has a screen adapted to display a plurality of functions, the method further comprising the step of: personalizing the at least one of the plurality of functions for the user. ### Claim 6 (depends on 4) A method as claimed in claim 4, wherein the interactive terminal further includes a light and the illumination level is adjusted by increasing the lighting level of the light. ### Claim 7 (depends on 1) A non-transitory computer-readable storage medium storing a computer program containing computer-executable code which, when executed on a computer, causes the computer to perform the steps of the method of claim 1. ### Claim 8 A device for face recognition comprising a processor adapted to: (a) perform an initial face recognition algorithm on an initial image of a user to determine the identity of the user, the initial image having an initial illumination level, and wherein performance of the initial face recognition algorithm on the initial image of the user to determine the identity of the user includes performance of a matching process of the initial image of the user with one or more stored images of the user; (b) determine if a reliability measurement of the identity of the user determined by the initial face recognition algorithm meets a first threshold, the first threshold indicating possible identification and, if the reliability measurement is above the first threshold indicating possible identification; (c) perform a face recognition algorithm on an image of a user to determine an identity of the user, the image having an illumination level; (d) determine if a reliability measurement of the identity of the user determined by the face recognition algorithm meets a second threshold, the second threshold indicating reliable identification and, if the reliability measurement is below the second threshold indicating reliable identification; (e) receive a new image of the user, the new image having an adjusted illumination level; and (f) perform a further face recognition algorithm on the new image of the user to determine the identity of the user. ### Claim 9 (depends on 8) A device as claimed in claim 8, wherein the processor is further adapted to: (g) determine if a reliability measurement of the identity of the user determined by the further face recognition algorithm meets the second threshold indicating reliable identification and, if the reliability measurement is below the second threshold indicating reliable identification, repeating steps (e) and (f). ### Claim 10 (depends on 9) A device as claimed in claim 9, wherein the processor is adapted to repeat steps (e), (f) and (g) iteratively. ### Claim 11 (depends on 8) A device as claimed in claim 8, being an interactive terminal and further comprising a screen, wherein, if the reliability measurement is above the threshold indicating reliable identification, the processor is further adapted to personalize the screen for the identified user. ### Claim 12 (depends on 11) A device as claimed in claim 11, wherein the processor is further adapted to display a plurality of functions on the screen, and, if the reliability measurement is above the threshold indicating reliable identification, the processor is adapted to personalize at least one of the plurality of functions for the identified user. ### Claim 13 (depends on 8) A device as claimed in claim 8, further comprising a light having an adjustable lighting level, wherein the processor adjusts the illumination level by increasing the lighting level of the light. ### Claim 14 An interactive terminal comprising: a touchscreen display configured to receive user input; a camera; a light source; a processing system, including a computer processor, for executing computer code so that the processing system is configured at least to: (a) receive input from the touchscreen display; (b) obtain an initial image of a user using the camera; (c) perform an initial face recognition algorithm on the initial image of a user to determine the identity of the user, the initial image having an initial illumination level, and wherein performance of the initial face recognition algorithm on the initial image of the user to determine the identity of the user includes performance of a matching process of the initial image of the user with one or more images of the user; (d) determine if a reliability measurement of the identity of the user determined by the initial face recognition algorithm meets a first threshold, the first threshold indicating possible identification and, if the reliability measurement is above the first threshold indicating possible identification: (e) perform a face recognition algorithm on an image of a user to determine an identity of the user, the image having an illumination level; and (f) determine if a reliability measurement of the identity of the user determined by the face recognition algorithm meets a second threshold, the second threshold indicating reliable identification, and if the reliability measurement is below the second threshold indicating reliable identification: (g) adjust an illumination level using the light source; (h) obtain a new image of the user having the adjusted illumination level using the camera; and (i) perform a further face recognition algorithm on the new image of the user to determine the identity of the user. ### Claim 15 (depends on 14) An interactive terminal as in claim 14, wherein the processing system is further configured to personalize a screen displayed on the touchscreen display for the user.